diff options
Diffstat (limited to 'sound/core')
46 files changed, 1938 insertions, 2403 deletions
diff --git a/sound/core/.kunitconfig b/sound/core/.kunitconfig new file mode 100644 index 0000000000..440f974ba0 --- /dev/null +++ b/sound/core/.kunitconfig @@ -0,0 +1,5 @@ +CONFIG_KUNIT=y +CONFIG_SOUND=y +CONFIG_SND=y +CONFIG_SND_PCM=y +CONFIG_SND_CORE_TEST=y diff --git a/sound/core/Kconfig b/sound/core/Kconfig index e41818e59a..8077f481d8 100644 --- a/sound/core/Kconfig +++ b/sound/core/Kconfig @@ -39,6 +39,23 @@ config SND_UMP_LEGACY_RAWMIDI legacy MIDI 1.0 byte streams is created for each UMP Endpoint. The device contains 16 substreams corresponding to UMP groups. +config SND_CORE_TEST + tristate "Sound core KUnit test" + depends on KUNIT + select SND_PCM + default KUNIT_ALL_TESTS + help + This options enables the sound core functions KUnit test. + + KUnit tests run during boot and output the results to the debug + log in TAP format (https://testanything.org/). Only useful for + kernel devs running KUnit test harness and are not for inclusion + into a production build. + + For more information on KUnit and unit tests in general, refer + to the KUnit documentation in Documentation/dev-tools/kunit/. + + config SND_COMPRESS_OFFLOAD tristate diff --git a/sound/core/Makefile b/sound/core/Makefile index f6526b3371..b8aa886198 100644 --- a/sound/core/Makefile +++ b/sound/core/Makefile @@ -48,6 +48,8 @@ obj-$(CONFIG_SND_SEQ_DEVICE) += snd-seq-device.o obj-$(CONFIG_SND_RAWMIDI) += snd-rawmidi.o obj-$(CONFIG_SND_UMP) += snd-ump.o +obj-$(CONFIG_SND_CORE_TEST) += sound_kunit.o + obj-$(CONFIG_SND_OSSEMUL) += oss/ obj-$(CONFIG_SND_SEQUENCER) += seq/ diff --git a/sound/core/compress_offload.c b/sound/core/compress_offload.c index 619371aa99..f0008fa2d8 100644 --- a/sound/core/compress_offload.c +++ b/sound/core/compress_offload.c @@ -127,9 +127,8 @@ static int snd_compr_open(struct inode *inode, struct file *f) init_waitqueue_head(&runtime->sleep); data->stream.runtime = runtime; f->private_data = (void *)data; - mutex_lock(&compr->lock); - ret = compr->ops->open(&data->stream); - mutex_unlock(&compr->lock); + scoped_guard(mutex, &compr->lock) + ret = compr->ops->open(&data->stream); if (ret) { kfree(runtime); kfree(data); @@ -288,7 +287,7 @@ static ssize_t snd_compr_write(struct file *f, const char __user *buf, return -EFAULT; stream = &data->stream; - mutex_lock(&stream->device->lock); + guard(mutex)(&stream->device->lock); /* write is allowed when stream is running or has been steup */ switch (stream->runtime->state) { case SNDRV_PCM_STATE_SETUP: @@ -296,7 +295,6 @@ static ssize_t snd_compr_write(struct file *f, const char __user *buf, case SNDRV_PCM_STATE_RUNNING: break; default: - mutex_unlock(&stream->device->lock); return -EBADFD; } @@ -322,7 +320,6 @@ static ssize_t snd_compr_write(struct file *f, const char __user *buf, pr_debug("stream prepared, Houston we are good to go\n"); } - mutex_unlock(&stream->device->lock); return retval; } @@ -339,7 +336,7 @@ static ssize_t snd_compr_read(struct file *f, char __user *buf, return -EFAULT; stream = &data->stream; - mutex_lock(&stream->device->lock); + guard(mutex)(&stream->device->lock); /* read is allowed when stream is running, paused, draining and setup * (yes setup is state which we transition to after stop, so if user @@ -350,11 +347,9 @@ static ssize_t snd_compr_read(struct file *f, char __user *buf, case SNDRV_PCM_STATE_PREPARED: case SNDRV_PCM_STATE_SUSPENDED: case SNDRV_PCM_STATE_DISCONNECTED: - retval = -EBADFD; - goto out; + return -EBADFD; case SNDRV_PCM_STATE_XRUN: - retval = -EPIPE; - goto out; + return -EPIPE; } avail = snd_compr_get_avail(stream); @@ -363,17 +358,13 @@ static ssize_t snd_compr_read(struct file *f, char __user *buf, if (avail > count) avail = count; - if (stream->ops->copy) { + if (stream->ops->copy) retval = stream->ops->copy(stream, buf, avail); - } else { - retval = -ENXIO; - goto out; - } + else + return -ENXIO; if (retval > 0) stream->runtime->total_bytes_transferred += retval; -out: - mutex_unlock(&stream->device->lock); return retval; } @@ -402,13 +393,12 @@ static __poll_t snd_compr_poll(struct file *f, poll_table *wait) stream = &data->stream; - mutex_lock(&stream->device->lock); + guard(mutex)(&stream->device->lock); switch (stream->runtime->state) { case SNDRV_PCM_STATE_OPEN: case SNDRV_PCM_STATE_XRUN: - retval = snd_compr_get_poll(stream) | EPOLLERR; - goto out; + return snd_compr_get_poll(stream) | EPOLLERR; default: break; } @@ -433,11 +423,9 @@ static __poll_t snd_compr_poll(struct file *f, poll_table *wait) retval = snd_compr_get_poll(stream); break; default: - retval = snd_compr_get_poll(stream) | EPOLLERR; - break; + return snd_compr_get_poll(stream) | EPOLLERR; } -out: - mutex_unlock(&stream->device->lock); + return retval; } @@ -465,7 +453,7 @@ static int snd_compr_get_codec_caps(struct snd_compr_stream *stream, unsigned long arg) { int retval; - struct snd_compr_codec_caps *caps; + struct snd_compr_codec_caps *caps __free(kfree) = NULL; if (!stream->ops->get_codec_caps) return -ENXIO; @@ -476,12 +464,9 @@ snd_compr_get_codec_caps(struct snd_compr_stream *stream, unsigned long arg) retval = stream->ops->get_codec_caps(stream, caps); if (retval) - goto out; + return retval; if (copy_to_user((void __user *)arg, caps, sizeof(*caps))) - retval = -EFAULT; - -out: - kfree(caps); + return -EFAULT; return retval; } #endif /* !COMPR_CODEC_CAPS_OVERFLOW */ @@ -586,7 +571,7 @@ static int snd_compress_check_input(struct snd_compr_params *params) static int snd_compr_set_params(struct snd_compr_stream *stream, unsigned long arg) { - struct snd_compr_params *params; + struct snd_compr_params *params __free(kfree) = NULL; int retval; if (stream->runtime->state == SNDRV_PCM_STATE_OPEN || stream->next_track) { @@ -596,24 +581,22 @@ snd_compr_set_params(struct snd_compr_stream *stream, unsigned long arg) */ params = memdup_user((void __user *)arg, sizeof(*params)); if (IS_ERR(params)) - return PTR_ERR(params); + return PTR_ERR(no_free_ptr(params)); retval = snd_compress_check_input(params); if (retval) - goto out; + return retval; retval = snd_compr_allocate_buffer(stream, params); - if (retval) { - retval = -ENOMEM; - goto out; - } + if (retval) + return -ENOMEM; retval = stream->ops->set_params(stream, params); if (retval) - goto out; + return retval; if (stream->next_track) - goto out; + return retval; stream->metadata_set = false; stream->next_track = false; @@ -622,15 +605,13 @@ snd_compr_set_params(struct snd_compr_stream *stream, unsigned long arg) } else { return -EPERM; } -out: - kfree(params); return retval; } static int snd_compr_get_params(struct snd_compr_stream *stream, unsigned long arg) { - struct snd_codec *params; + struct snd_codec *params __free(kfree) = NULL; int retval; if (!stream->ops->get_params) @@ -641,12 +622,9 @@ snd_compr_get_params(struct snd_compr_stream *stream, unsigned long arg) return -ENOMEM; retval = stream->ops->get_params(stream, params); if (retval) - goto out; + return retval; if (copy_to_user((char __user *)arg, params, sizeof(*params))) - retval = -EFAULT; - -out: - kfree(params); + return -EFAULT; return retval; } @@ -805,12 +783,10 @@ static void error_delayed_work(struct work_struct *work) stream = container_of(work, struct snd_compr_stream, error_work.work); - mutex_lock(&stream->device->lock); + guard(mutex)(&stream->device->lock); stream->ops->trigger(stream, SNDRV_PCM_TRIGGER_STOP); wake_up(&stream->runtime->sleep); - - mutex_unlock(&stream->device->lock); } /** @@ -967,70 +943,52 @@ static long snd_compr_ioctl(struct file *f, unsigned int cmd, unsigned long arg) { struct snd_compr_file *data = f->private_data; struct snd_compr_stream *stream; - int retval = -ENOTTY; if (snd_BUG_ON(!data)) return -EFAULT; stream = &data->stream; - mutex_lock(&stream->device->lock); + guard(mutex)(&stream->device->lock); switch (_IOC_NR(cmd)) { case _IOC_NR(SNDRV_COMPRESS_IOCTL_VERSION): - retval = put_user(SNDRV_COMPRESS_VERSION, + return put_user(SNDRV_COMPRESS_VERSION, (int __user *)arg) ? -EFAULT : 0; - break; case _IOC_NR(SNDRV_COMPRESS_GET_CAPS): - retval = snd_compr_get_caps(stream, arg); - break; + return snd_compr_get_caps(stream, arg); #ifndef COMPR_CODEC_CAPS_OVERFLOW case _IOC_NR(SNDRV_COMPRESS_GET_CODEC_CAPS): - retval = snd_compr_get_codec_caps(stream, arg); - break; + return snd_compr_get_codec_caps(stream, arg); #endif case _IOC_NR(SNDRV_COMPRESS_SET_PARAMS): - retval = snd_compr_set_params(stream, arg); - break; + return snd_compr_set_params(stream, arg); case _IOC_NR(SNDRV_COMPRESS_GET_PARAMS): - retval = snd_compr_get_params(stream, arg); - break; + return snd_compr_get_params(stream, arg); case _IOC_NR(SNDRV_COMPRESS_SET_METADATA): - retval = snd_compr_set_metadata(stream, arg); - break; + return snd_compr_set_metadata(stream, arg); case _IOC_NR(SNDRV_COMPRESS_GET_METADATA): - retval = snd_compr_get_metadata(stream, arg); - break; + return snd_compr_get_metadata(stream, arg); case _IOC_NR(SNDRV_COMPRESS_TSTAMP): - retval = snd_compr_tstamp(stream, arg); - break; + return snd_compr_tstamp(stream, arg); case _IOC_NR(SNDRV_COMPRESS_AVAIL): - retval = snd_compr_ioctl_avail(stream, arg); - break; + return snd_compr_ioctl_avail(stream, arg); case _IOC_NR(SNDRV_COMPRESS_PAUSE): - retval = snd_compr_pause(stream); - break; + return snd_compr_pause(stream); case _IOC_NR(SNDRV_COMPRESS_RESUME): - retval = snd_compr_resume(stream); - break; + return snd_compr_resume(stream); case _IOC_NR(SNDRV_COMPRESS_START): - retval = snd_compr_start(stream); - break; + return snd_compr_start(stream); case _IOC_NR(SNDRV_COMPRESS_STOP): - retval = snd_compr_stop(stream); - break; + return snd_compr_stop(stream); case _IOC_NR(SNDRV_COMPRESS_DRAIN): - retval = snd_compr_drain(stream); - break; + return snd_compr_drain(stream); case _IOC_NR(SNDRV_COMPRESS_PARTIAL_DRAIN): - retval = snd_compr_partial_drain(stream); - break; + return snd_compr_partial_drain(stream); case _IOC_NR(SNDRV_COMPRESS_NEXT_TRACK): - retval = snd_compr_next_track(stream); - break; - + return snd_compr_next_track(stream); } - mutex_unlock(&stream->device->lock); - return retval; + + return -ENOTTY; } /* support of 32bit userspace on 64bit platforms */ diff --git a/sound/core/control.c b/sound/core/control.c index 59c8658966..fb0c60044f 100644 --- a/sound/core/control.c +++ b/sound/core/control.c @@ -44,7 +44,6 @@ static int snd_ctl_remove_locked(struct snd_card *card, static int snd_ctl_open(struct inode *inode, struct file *file) { - unsigned long flags; struct snd_card *card; struct snd_ctl_file *ctl; int i, err; @@ -80,9 +79,8 @@ static int snd_ctl_open(struct inode *inode, struct file *file) ctl->preferred_subdevice[i] = -1; ctl->pid = get_pid(task_pid(current)); file->private_data = ctl; - write_lock_irqsave(&card->ctl_files_rwlock, flags); - list_add_tail(&ctl->list, &card->ctl_files); - write_unlock_irqrestore(&card->ctl_files_rwlock, flags); + scoped_guard(write_lock_irqsave, &card->ctl_files_rwlock) + list_add_tail(&ctl->list, &card->ctl_files); snd_card_unref(card); return 0; @@ -98,21 +96,18 @@ static int snd_ctl_open(struct inode *inode, struct file *file) static void snd_ctl_empty_read_queue(struct snd_ctl_file * ctl) { - unsigned long flags; struct snd_kctl_event *cread; - spin_lock_irqsave(&ctl->read_lock, flags); + guard(spinlock_irqsave)(&ctl->read_lock); while (!list_empty(&ctl->events)) { cread = snd_kctl_event(ctl->events.next); list_del(&cread->list); kfree(cread); } - spin_unlock_irqrestore(&ctl->read_lock, flags); } static int snd_ctl_release(struct inode *inode, struct file *file) { - unsigned long flags; struct snd_card *card; struct snd_ctl_file *ctl; struct snd_kcontrol *control; @@ -121,15 +116,17 @@ static int snd_ctl_release(struct inode *inode, struct file *file) ctl = file->private_data; file->private_data = NULL; card = ctl->card; - write_lock_irqsave(&card->ctl_files_rwlock, flags); - list_del(&ctl->list); - write_unlock_irqrestore(&card->ctl_files_rwlock, flags); - down_write(&card->controls_rwsem); - list_for_each_entry(control, &card->controls, list) - for (idx = 0; idx < control->count; idx++) - if (control->vd[idx].owner == ctl) - control->vd[idx].owner = NULL; - up_write(&card->controls_rwsem); + + scoped_guard(write_lock_irqsave, &card->ctl_files_rwlock) + list_del(&ctl->list); + + scoped_guard(rwsem_write, &card->controls_rwsem) { + list_for_each_entry(control, &card->controls, list) + for (idx = 0; idx < control->count; idx++) + if (control->vd[idx].owner == ctl) + control->vd[idx].owner = NULL; + } + snd_fasync_free(ctl->fasync); snd_ctl_empty_read_queue(ctl); put_pid(ctl->pid); @@ -152,7 +149,6 @@ static int snd_ctl_release(struct inode *inode, struct file *file) void snd_ctl_notify(struct snd_card *card, unsigned int mask, struct snd_ctl_elem_id *id) { - unsigned long flags; struct snd_ctl_file *ctl; struct snd_kctl_event *ev; @@ -160,34 +156,34 @@ void snd_ctl_notify(struct snd_card *card, unsigned int mask, return; if (card->shutdown) return; - read_lock_irqsave(&card->ctl_files_rwlock, flags); + + guard(read_lock_irqsave)(&card->ctl_files_rwlock); #if IS_ENABLED(CONFIG_SND_MIXER_OSS) card->mixer_oss_change_count++; #endif list_for_each_entry(ctl, &card->ctl_files, list) { if (!ctl->subscribed) continue; - spin_lock(&ctl->read_lock); - list_for_each_entry(ev, &ctl->events, list) { - if (ev->id.numid == id->numid) { - ev->mask |= mask; - goto _found; + scoped_guard(spinlock, &ctl->read_lock) { + list_for_each_entry(ev, &ctl->events, list) { + if (ev->id.numid == id->numid) { + ev->mask |= mask; + goto _found; + } } + ev = kzalloc(sizeof(*ev), GFP_ATOMIC); + if (ev) { + ev->id = *id; + ev->mask = mask; + list_add_tail(&ev->list, &ctl->events); + } else { + dev_err(card->dev, "No memory available to allocate event\n"); + } +_found: + wake_up(&ctl->change_sleep); } - ev = kzalloc(sizeof(*ev), GFP_ATOMIC); - if (ev) { - ev->id = *id; - ev->mask = mask; - list_add_tail(&ev->list, &ctl->events); - } else { - dev_err(card->dev, "No memory available to allocate event\n"); - } - _found: - wake_up(&ctl->change_sleep); - spin_unlock(&ctl->read_lock); snd_kill_fasync(ctl->fasync, SIGIO, POLL_IN); } - read_unlock_irqrestore(&card->ctl_files_rwlock, flags); } EXPORT_SYMBOL(snd_ctl_notify); @@ -210,10 +206,9 @@ void snd_ctl_notify_one(struct snd_card *card, unsigned int mask, id.index += ioff; id.numid += ioff; snd_ctl_notify(card, mask, &id); - down_read(&snd_ctl_layer_rwsem); + guard(rwsem_read)(&snd_ctl_layer_rwsem); for (lops = snd_ctl_layer; lops; lops = lops->next) lops->lnotify(card, mask, kctl, ioff); - up_read(&snd_ctl_layer_rwsem); } EXPORT_SYMBOL(snd_ctl_notify_one); @@ -520,9 +515,9 @@ static int snd_ctl_add_replace(struct snd_card *card, if (snd_BUG_ON(!card || !kcontrol->info)) goto error; - down_write(&card->controls_rwsem); - err = __snd_ctl_add_replace(card, kcontrol, mode); - up_write(&card->controls_rwsem); + scoped_guard(rwsem_write, &card->controls_rwsem) + err = __snd_ctl_add_replace(card, kcontrol, mode); + if (err < 0) goto error; return 0; @@ -616,12 +611,8 @@ static inline int snd_ctl_remove_locked(struct snd_card *card, */ int snd_ctl_remove(struct snd_card *card, struct snd_kcontrol *kcontrol) { - int ret; - - down_write(&card->controls_rwsem); - ret = snd_ctl_remove_locked(card, kcontrol); - up_write(&card->controls_rwsem); - return ret; + guard(rwsem_write)(&card->controls_rwsem); + return snd_ctl_remove_locked(card, kcontrol); } EXPORT_SYMBOL(snd_ctl_remove); @@ -638,17 +629,12 @@ EXPORT_SYMBOL(snd_ctl_remove); int snd_ctl_remove_id(struct snd_card *card, struct snd_ctl_elem_id *id) { struct snd_kcontrol *kctl; - int ret; - down_write(&card->controls_rwsem); + guard(rwsem_write)(&card->controls_rwsem); kctl = snd_ctl_find_id_locked(card, id); - if (kctl == NULL) { - up_write(&card->controls_rwsem); + if (kctl == NULL) return -ENOENT; - } - ret = snd_ctl_remove_locked(card, kctl); - up_write(&card->controls_rwsem); - return ret; + return snd_ctl_remove_locked(card, kctl); } EXPORT_SYMBOL(snd_ctl_remove_id); @@ -667,27 +653,18 @@ static int snd_ctl_remove_user_ctl(struct snd_ctl_file * file, { struct snd_card *card = file->card; struct snd_kcontrol *kctl; - int idx, ret; + int idx; - down_write(&card->controls_rwsem); + guard(rwsem_write)(&card->controls_rwsem); kctl = snd_ctl_find_id_locked(card, id); - if (kctl == NULL) { - ret = -ENOENT; - goto error; - } - if (!(kctl->vd[0].access & SNDRV_CTL_ELEM_ACCESS_USER)) { - ret = -EINVAL; - goto error; - } + if (kctl == NULL) + return -ENOENT; + if (!(kctl->vd[0].access & SNDRV_CTL_ELEM_ACCESS_USER)) + return -EINVAL; for (idx = 0; idx < kctl->count; idx++) - if (kctl->vd[idx].owner != NULL && kctl->vd[idx].owner != file) { - ret = -EBUSY; - goto error; - } - ret = snd_ctl_remove_locked(card, kctl); -error: - up_write(&card->controls_rwsem); - return ret; + if (kctl->vd[idx].owner != NULL && kctl->vd[idx].owner != file) + return -EBUSY; + return snd_ctl_remove_locked(card, kctl); } /** @@ -764,18 +741,15 @@ int snd_ctl_rename_id(struct snd_card *card, struct snd_ctl_elem_id *src_id, struct snd_kcontrol *kctl; int saved_numid; - down_write(&card->controls_rwsem); + guard(rwsem_write)(&card->controls_rwsem); kctl = snd_ctl_find_id_locked(card, src_id); - if (kctl == NULL) { - up_write(&card->controls_rwsem); + if (kctl == NULL) return -ENOENT; - } saved_numid = kctl->id.numid; remove_hash_entries(card, kctl); kctl->id = *dst_id; kctl->id.numid = saved_numid; add_hash_entries(card, kctl); - up_write(&card->controls_rwsem); return 0; } EXPORT_SYMBOL(snd_ctl_rename_id); @@ -793,7 +767,7 @@ EXPORT_SYMBOL(snd_ctl_rename_id); void snd_ctl_rename(struct snd_card *card, struct snd_kcontrol *kctl, const char *name) { - down_write(&card->controls_rwsem); + guard(rwsem_write)(&card->controls_rwsem); remove_hash_entries(card, kctl); if (strscpy(kctl->id.name, name, sizeof(kctl->id.name)) < 0) @@ -801,7 +775,6 @@ void snd_ctl_rename(struct snd_card *card, struct snd_kcontrol *kctl, name, kctl->id.name); add_hash_entries(card, kctl); - up_write(&card->controls_rwsem); } EXPORT_SYMBOL(snd_ctl_rename); @@ -859,12 +832,8 @@ EXPORT_SYMBOL(snd_ctl_find_numid_locked); struct snd_kcontrol *snd_ctl_find_numid(struct snd_card *card, unsigned int numid) { - struct snd_kcontrol *kctl; - - down_read(&card->controls_rwsem); - kctl = snd_ctl_find_numid_locked(card, numid); - up_read(&card->controls_rwsem); - return kctl; + guard(rwsem_read)(&card->controls_rwsem); + return snd_ctl_find_numid_locked(card, numid); } EXPORT_SYMBOL(snd_ctl_find_numid); @@ -920,37 +889,30 @@ EXPORT_SYMBOL(snd_ctl_find_id_locked); struct snd_kcontrol *snd_ctl_find_id(struct snd_card *card, const struct snd_ctl_elem_id *id) { - struct snd_kcontrol *kctl; - - down_read(&card->controls_rwsem); - kctl = snd_ctl_find_id_locked(card, id); - up_read(&card->controls_rwsem); - return kctl; + guard(rwsem_read)(&card->controls_rwsem); + return snd_ctl_find_id_locked(card, id); } EXPORT_SYMBOL(snd_ctl_find_id); static int snd_ctl_card_info(struct snd_card *card, struct snd_ctl_file * ctl, unsigned int cmd, void __user *arg) { - struct snd_ctl_card_info *info; + struct snd_ctl_card_info *info __free(kfree) = NULL; info = kzalloc(sizeof(*info), GFP_KERNEL); if (! info) return -ENOMEM; - down_read(&snd_ioctl_rwsem); - info->card = card->number; - strscpy(info->id, card->id, sizeof(info->id)); - strscpy(info->driver, card->driver, sizeof(info->driver)); - strscpy(info->name, card->shortname, sizeof(info->name)); - strscpy(info->longname, card->longname, sizeof(info->longname)); - strscpy(info->mixername, card->mixername, sizeof(info->mixername)); - strscpy(info->components, card->components, sizeof(info->components)); - up_read(&snd_ioctl_rwsem); - if (copy_to_user(arg, info, sizeof(struct snd_ctl_card_info))) { - kfree(info); + scoped_guard(rwsem_read, &snd_ioctl_rwsem) { + info->card = card->number; + strscpy(info->id, card->id, sizeof(info->id)); + strscpy(info->driver, card->driver, sizeof(info->driver)); + strscpy(info->name, card->shortname, sizeof(info->name)); + strscpy(info->longname, card->longname, sizeof(info->longname)); + strscpy(info->mixername, card->mixername, sizeof(info->mixername)); + strscpy(info->components, card->components, sizeof(info->components)); + } + if (copy_to_user(arg, info, sizeof(struct snd_ctl_card_info))) return -EFAULT; - } - kfree(info); return 0; } @@ -960,37 +922,31 @@ static int snd_ctl_elem_list(struct snd_card *card, struct snd_kcontrol *kctl; struct snd_ctl_elem_id id; unsigned int offset, space, jidx; - int err = 0; offset = list->offset; space = list->space; - down_read(&card->controls_rwsem); + guard(rwsem_read)(&card->controls_rwsem); list->count = card->controls_count; list->used = 0; - if (space > 0) { - list_for_each_entry(kctl, &card->controls, list) { - if (offset >= kctl->count) { - offset -= kctl->count; - continue; - } - for (jidx = offset; jidx < kctl->count; jidx++) { - snd_ctl_build_ioff(&id, kctl, jidx); - if (copy_to_user(list->pids + list->used, &id, - sizeof(id))) { - err = -EFAULT; - goto out; - } - list->used++; - if (!--space) - goto out; - } - offset = 0; + if (!space) + return 0; + list_for_each_entry(kctl, &card->controls, list) { + if (offset >= kctl->count) { + offset -= kctl->count; + continue; } + for (jidx = offset; jidx < kctl->count; jidx++) { + snd_ctl_build_ioff(&id, kctl, jidx); + if (copy_to_user(list->pids + list->used, &id, sizeof(id))) + return -EFAULT; + list->used++; + if (!--space) + return 0; + } + offset = 0; } - out: - up_read(&card->controls_rwsem); - return err; + return 0; } static int snd_ctl_elem_list_user(struct snd_card *card, @@ -1238,16 +1194,12 @@ static int snd_ctl_elem_info(struct snd_ctl_file *ctl, { struct snd_card *card = ctl->card; struct snd_kcontrol *kctl; - int result; - down_read(&card->controls_rwsem); + guard(rwsem_read)(&card->controls_rwsem); kctl = snd_ctl_find_id_locked(card, &info->id); - if (kctl == NULL) - result = -ENOENT; - else - result = __snd_ctl_elem_info(card, kctl, info, ctl); - up_read(&card->controls_rwsem); - return result; + if (!kctl) + return -ENOENT; + return __snd_ctl_elem_info(card, kctl, info, ctl); } static int snd_ctl_elem_info_user(struct snd_ctl_file *ctl, @@ -1279,19 +1231,15 @@ static int snd_ctl_elem_read(struct snd_card *card, const u32 pattern = 0xdeadbeef; int ret; - down_read(&card->controls_rwsem); + guard(rwsem_read)(&card->controls_rwsem); kctl = snd_ctl_find_id_locked(card, &control->id); - if (kctl == NULL) { - ret = -ENOENT; - goto unlock; - } + if (!kctl) + return -ENOENT; index_offset = snd_ctl_get_ioff(kctl, &control->id); vd = &kctl->vd[index_offset]; - if (!(vd->access & SNDRV_CTL_ELEM_ACCESS_READ) || kctl->get == NULL) { - ret = -EPERM; - goto unlock; - } + if (!(vd->access & SNDRV_CTL_ELEM_ACCESS_READ) || !kctl->get) + return -EPERM; snd_ctl_build_ioff(&control->id, kctl, index_offset); @@ -1301,7 +1249,7 @@ static int snd_ctl_elem_read(struct snd_card *card, info.id = control->id; ret = __snd_ctl_elem_info(card, kctl, &info, NULL); if (ret < 0) - goto unlock; + return ret; #endif if (!snd_ctl_skip_validation(&info)) @@ -1311,7 +1259,7 @@ static int snd_ctl_elem_read(struct snd_card *card, ret = kctl->get(kctl, control); snd_power_unref(card); if (ret < 0) - goto unlock; + return ret; if (!snd_ctl_skip_validation(&info) && sanity_check_elem_value(card, control, &info, pattern) < 0) { dev_err(card->dev, @@ -1319,32 +1267,27 @@ static int snd_ctl_elem_read(struct snd_card *card, control->id.iface, control->id.device, control->id.subdevice, control->id.name, control->id.index); - ret = -EINVAL; - goto unlock; + return -EINVAL; } -unlock: - up_read(&card->controls_rwsem); - return ret; + return 0; } static int snd_ctl_elem_read_user(struct snd_card *card, struct snd_ctl_elem_value __user *_control) { - struct snd_ctl_elem_value *control; + struct snd_ctl_elem_value *control __free(kfree) = NULL; int result; control = memdup_user(_control, sizeof(*control)); if (IS_ERR(control)) - return PTR_ERR(control); + return PTR_ERR(no_free_ptr(control)); result = snd_ctl_elem_read(card, control); if (result < 0) - goto error; + return result; if (copy_to_user(_control, control, sizeof(*control))) - result = -EFAULT; - error: - kfree(control); + return -EFAULT; return result; } @@ -1406,23 +1349,21 @@ static int snd_ctl_elem_write(struct snd_card *card, struct snd_ctl_file *file, static int snd_ctl_elem_write_user(struct snd_ctl_file *file, struct snd_ctl_elem_value __user *_control) { - struct snd_ctl_elem_value *control; + struct snd_ctl_elem_value *control __free(kfree) = NULL; struct snd_card *card; int result; control = memdup_user(_control, sizeof(*control)); if (IS_ERR(control)) - return PTR_ERR(control); + return PTR_ERR(no_free_ptr(control)); card = file->card; result = snd_ctl_elem_write(card, file, control); if (result < 0) - goto error; + return result; if (copy_to_user(_control, control, sizeof(*control))) - result = -EFAULT; - error: - kfree(control); + return -EFAULT; return result; } @@ -1433,25 +1374,18 @@ static int snd_ctl_elem_lock(struct snd_ctl_file *file, struct snd_ctl_elem_id id; struct snd_kcontrol *kctl; struct snd_kcontrol_volatile *vd; - int result; if (copy_from_user(&id, _id, sizeof(id))) return -EFAULT; - down_write(&card->controls_rwsem); + guard(rwsem_write)(&card->controls_rwsem); kctl = snd_ctl_find_id_locked(card, &id); - if (kctl == NULL) { - result = -ENOENT; - } else { - vd = &kctl->vd[snd_ctl_get_ioff(kctl, &id)]; - if (vd->owner != NULL) - result = -EBUSY; - else { - vd->owner = file; - result = 0; - } - } - up_write(&card->controls_rwsem); - return result; + if (!kctl) + return -ENOENT; + vd = &kctl->vd[snd_ctl_get_ioff(kctl, &id)]; + if (vd->owner) + return -EBUSY; + vd->owner = file; + return 0; } static int snd_ctl_elem_unlock(struct snd_ctl_file *file, @@ -1461,27 +1395,20 @@ static int snd_ctl_elem_unlock(struct snd_ctl_file *file, struct snd_ctl_elem_id id; struct snd_kcontrol *kctl; struct snd_kcontrol_volatile *vd; - int result; if (copy_from_user(&id, _id, sizeof(id))) return -EFAULT; - down_write(&card->controls_rwsem); + guard(rwsem_write)(&card->controls_rwsem); kctl = snd_ctl_find_id_locked(card, &id); - if (kctl == NULL) { - result = -ENOENT; - } else { - vd = &kctl->vd[snd_ctl_get_ioff(kctl, &id)]; - if (vd->owner == NULL) - result = -EINVAL; - else if (vd->owner != file) - result = -EPERM; - else { - vd->owner = NULL; - result = 0; - } - } - up_write(&card->controls_rwsem); - return result; + if (!kctl) + return -ENOENT; + vd = &kctl->vd[snd_ctl_get_ioff(kctl, &id)]; + if (!vd->owner) + return -EINVAL; + if (vd->owner != file) + return -EPERM; + vd->owner = NULL; + return 0; } struct user_element { @@ -1763,11 +1690,9 @@ static int snd_ctl_elem_add(struct snd_ctl_file *file, private_size = value_sizes[info->type] * info->count; alloc_size = compute_user_elem_size(private_size, count); - down_write(&card->controls_rwsem); - if (check_user_elem_overflow(card, alloc_size)) { - err = -ENOMEM; - goto unlock; - } + guard(rwsem_write)(&card->controls_rwsem); + if (check_user_elem_overflow(card, alloc_size)) + return -ENOMEM; /* * Keep memory object for this userspace control. After passing this @@ -1777,13 +1702,12 @@ static int snd_ctl_elem_add(struct snd_ctl_file *file, */ err = snd_ctl_new(&kctl, count, access, file); if (err < 0) - goto unlock; + return err; memcpy(&kctl->id, &info->id, sizeof(kctl->id)); ue = kzalloc(alloc_size, GFP_KERNEL); if (!ue) { kfree(kctl); - err = -ENOMEM; - goto unlock; + return -ENOMEM; } kctl->private_data = ue; kctl->private_free = snd_ctl_elem_user_free; @@ -1801,7 +1725,7 @@ static int snd_ctl_elem_add(struct snd_ctl_file *file, err = snd_ctl_elem_init_enum_names(ue); if (err < 0) { snd_ctl_free_one(kctl); - goto unlock; + return err; } } @@ -1821,7 +1745,7 @@ static int snd_ctl_elem_add(struct snd_ctl_file *file, err = __snd_ctl_add_replace(card, kctl, CTL_ADD_EXCLUSIVE); if (err < 0) { snd_ctl_free_one(kctl); - goto unlock; + return err; } offset = snd_ctl_get_ioff(kctl, &info->id); snd_ctl_build_ioff(&info->id, kctl, offset); @@ -1832,9 +1756,7 @@ static int snd_ctl_elem_add(struct snd_ctl_file *file, * applications because the field originally means PID of a process * which locks the element. */ - unlock: - up_write(&card->controls_rwsem); - return err; + return 0; } static int snd_ctl_elem_add_user(struct snd_ctl_file *file, @@ -2036,34 +1958,29 @@ static long snd_ctl_ioctl(struct file *file, unsigned int cmd, unsigned long arg case SNDRV_CTL_IOCTL_SUBSCRIBE_EVENTS: return snd_ctl_subscribe_events(ctl, ip); case SNDRV_CTL_IOCTL_TLV_READ: - down_read(&ctl->card->controls_rwsem); - err = snd_ctl_tlv_ioctl(ctl, argp, SNDRV_CTL_TLV_OP_READ); - up_read(&ctl->card->controls_rwsem); + scoped_guard(rwsem_read, &ctl->card->controls_rwsem) + err = snd_ctl_tlv_ioctl(ctl, argp, SNDRV_CTL_TLV_OP_READ); return err; case SNDRV_CTL_IOCTL_TLV_WRITE: - down_write(&ctl->card->controls_rwsem); - err = snd_ctl_tlv_ioctl(ctl, argp, SNDRV_CTL_TLV_OP_WRITE); - up_write(&ctl->card->controls_rwsem); + scoped_guard(rwsem_write, &ctl->card->controls_rwsem) + err = snd_ctl_tlv_ioctl(ctl, argp, SNDRV_CTL_TLV_OP_WRITE); return err; case SNDRV_CTL_IOCTL_TLV_COMMAND: - down_write(&ctl->card->controls_rwsem); - err = snd_ctl_tlv_ioctl(ctl, argp, SNDRV_CTL_TLV_OP_CMD); - up_write(&ctl->card->controls_rwsem); + scoped_guard(rwsem_write, &ctl->card->controls_rwsem) + err = snd_ctl_tlv_ioctl(ctl, argp, SNDRV_CTL_TLV_OP_CMD); return err; case SNDRV_CTL_IOCTL_POWER: return -ENOPROTOOPT; case SNDRV_CTL_IOCTL_POWER_STATE: return put_user(SNDRV_CTL_POWER_D0, ip) ? -EFAULT : 0; } - down_read(&snd_ioctl_rwsem); + + guard(rwsem_read)(&snd_ioctl_rwsem); list_for_each_entry(p, &snd_control_ioctls, list) { err = p->fioctl(card, ctl, cmd, arg); - if (err != -ENOIOCTLCMD) { - up_read(&snd_ioctl_rwsem); + if (err != -ENOIOCTLCMD) return err; - } } - up_read(&snd_ioctl_rwsem); dev_dbg(card->dev, "unknown ioctl = 0x%x\n", cmd); return -ENOTTY; } @@ -2155,9 +2072,8 @@ static int _snd_ctl_register_ioctl(snd_kctl_ioctl_func_t fcn, struct list_head * if (pn == NULL) return -ENOMEM; pn->fioctl = fcn; - down_write(&snd_ioctl_rwsem); + guard(rwsem_write)(&snd_ioctl_rwsem); list_add_tail(&pn->list, lists); - up_write(&snd_ioctl_rwsem); return 0; } @@ -2200,16 +2116,14 @@ static int _snd_ctl_unregister_ioctl(snd_kctl_ioctl_func_t fcn, if (snd_BUG_ON(!fcn)) return -EINVAL; - down_write(&snd_ioctl_rwsem); + guard(rwsem_write)(&snd_ioctl_rwsem); list_for_each_entry(p, lists, list) { if (p->fioctl == fcn) { list_del(&p->list); - up_write(&snd_ioctl_rwsem); kfree(p); return 0; } } - up_write(&snd_ioctl_rwsem); snd_BUG(); return -EINVAL; } @@ -2256,9 +2170,8 @@ int snd_ctl_get_preferred_subdevice(struct snd_card *card, int type) { struct snd_ctl_file *kctl; int subdevice = -1; - unsigned long flags; - read_lock_irqsave(&card->ctl_files_rwlock, flags); + guard(read_lock_irqsave)(&card->ctl_files_rwlock); list_for_each_entry(kctl, &card->ctl_files, list) { if (kctl->pid == task_pid(current)) { subdevice = kctl->preferred_subdevice[type]; @@ -2266,7 +2179,6 @@ int snd_ctl_get_preferred_subdevice(struct snd_card *card, int type) break; } } - read_unlock_irqrestore(&card->ctl_files_rwlock, flags); return subdevice; } EXPORT_SYMBOL_GPL(snd_ctl_get_preferred_subdevice); @@ -2296,13 +2208,11 @@ int snd_ctl_request_layer(const char *module_name) if (module_name == NULL) return 0; - down_read(&snd_ctl_layer_rwsem); - for (lops = snd_ctl_layer; lops; lops = lops->next) - if (strcmp(lops->module_name, module_name) == 0) - break; - up_read(&snd_ctl_layer_rwsem); - if (lops) - return 0; + scoped_guard(rwsem_read, &snd_ctl_layer_rwsem) { + for (lops = snd_ctl_layer; lops; lops = lops->next) + if (strcmp(lops->module_name, module_name) == 0) + return 0; + } return request_module(module_name); } EXPORT_SYMBOL_GPL(snd_ctl_request_layer); @@ -2319,16 +2229,15 @@ void snd_ctl_register_layer(struct snd_ctl_layer_ops *lops) struct snd_card *card; int card_number; - down_write(&snd_ctl_layer_rwsem); - lops->next = snd_ctl_layer; - snd_ctl_layer = lops; - up_write(&snd_ctl_layer_rwsem); + scoped_guard(rwsem_write, &snd_ctl_layer_rwsem) { + lops->next = snd_ctl_layer; + snd_ctl_layer = lops; + } for (card_number = 0; card_number < SNDRV_CARDS; card_number++) { card = snd_card_ref(card_number); if (card) { - down_read(&card->controls_rwsem); - lops->lregister(card); - up_read(&card->controls_rwsem); + scoped_guard(rwsem_read, &card->controls_rwsem) + lops->lregister(card); snd_card_unref(card); } } @@ -2347,7 +2256,7 @@ void snd_ctl_disconnect_layer(struct snd_ctl_layer_ops *lops) { struct snd_ctl_layer_ops *lops2, *prev_lops2; - down_write(&snd_ctl_layer_rwsem); + guard(rwsem_write)(&snd_ctl_layer_rwsem); for (lops2 = snd_ctl_layer, prev_lops2 = NULL; lops2; lops2 = lops2->next) { if (lops2 == lops) { if (!prev_lops2) @@ -2358,7 +2267,6 @@ void snd_ctl_disconnect_layer(struct snd_ctl_layer_ops *lops) } prev_lops2 = lops2; } - up_write(&snd_ctl_layer_rwsem); } EXPORT_SYMBOL_GPL(snd_ctl_disconnect_layer); @@ -2379,25 +2287,29 @@ static const struct file_operations snd_ctl_f_ops = .fasync = snd_ctl_fasync, }; +/* call lops under rwsems; called from snd_ctl_dev_*() below() */ +#define call_snd_ctl_lops(_card, _op) \ + do { \ + struct snd_ctl_layer_ops *lops; \ + guard(rwsem_read)(&(_card)->controls_rwsem); \ + guard(rwsem_read)(&snd_ctl_layer_rwsem); \ + for (lops = snd_ctl_layer; lops; lops = lops->next) \ + lops->_op(_card); \ + } while (0) + /* * registration of the control device */ static int snd_ctl_dev_register(struct snd_device *device) { struct snd_card *card = device->device_data; - struct snd_ctl_layer_ops *lops; int err; err = snd_register_device(SNDRV_DEVICE_TYPE_CONTROL, card, -1, &snd_ctl_f_ops, card, card->ctl_dev); if (err < 0) return err; - down_read(&card->controls_rwsem); - down_read(&snd_ctl_layer_rwsem); - for (lops = snd_ctl_layer; lops; lops = lops->next) - lops->lregister(card); - up_read(&snd_ctl_layer_rwsem); - up_read(&card->controls_rwsem); + call_snd_ctl_lops(card, lregister); return 0; } @@ -2408,23 +2320,15 @@ static int snd_ctl_dev_disconnect(struct snd_device *device) { struct snd_card *card = device->device_data; struct snd_ctl_file *ctl; - struct snd_ctl_layer_ops *lops; - unsigned long flags; - read_lock_irqsave(&card->ctl_files_rwlock, flags); - list_for_each_entry(ctl, &card->ctl_files, list) { - wake_up(&ctl->change_sleep); - snd_kill_fasync(ctl->fasync, SIGIO, POLL_ERR); + scoped_guard(read_lock_irqsave, &card->ctl_files_rwlock) { + list_for_each_entry(ctl, &card->ctl_files, list) { + wake_up(&ctl->change_sleep); + snd_kill_fasync(ctl->fasync, SIGIO, POLL_ERR); + } } - read_unlock_irqrestore(&card->ctl_files_rwlock, flags); - - down_read(&card->controls_rwsem); - down_read(&snd_ctl_layer_rwsem); - for (lops = snd_ctl_layer; lops; lops = lops->next) - lops->ldisconnect(card); - up_read(&snd_ctl_layer_rwsem); - up_read(&card->controls_rwsem); + call_snd_ctl_lops(card, ldisconnect); return snd_unregister_device(card->ctl_dev); } @@ -2436,17 +2340,17 @@ static int snd_ctl_dev_free(struct snd_device *device) struct snd_card *card = device->device_data; struct snd_kcontrol *control; - down_write(&card->controls_rwsem); - while (!list_empty(&card->controls)) { - control = snd_kcontrol(card->controls.next); - __snd_ctl_remove(card, control, false); - } + scoped_guard(rwsem_write, &card->controls_rwsem) { + while (!list_empty(&card->controls)) { + control = snd_kcontrol(card->controls.next); + __snd_ctl_remove(card, control, false); + } #ifdef CONFIG_SND_CTL_FAST_LOOKUP - xa_destroy(&card->ctl_numids); - xa_destroy(&card->ctl_hash); + xa_destroy(&card->ctl_numids); + xa_destroy(&card->ctl_hash); #endif - up_write(&card->controls_rwsem); + } put_device(card->ctl_dev); return 0; } diff --git a/sound/core/control_compat.c b/sound/core/control_compat.c index 63d7875010..934bb945e7 100644 --- a/sound/core/control_compat.c +++ b/sound/core/control_compat.c @@ -79,61 +79,56 @@ struct snd_ctl_elem_info32 { static int snd_ctl_elem_info_compat(struct snd_ctl_file *ctl, struct snd_ctl_elem_info32 __user *data32) { - struct snd_ctl_elem_info *data; + struct snd_ctl_elem_info *data __free(kfree) = NULL; int err; data = kzalloc(sizeof(*data), GFP_KERNEL); if (! data) return -ENOMEM; - err = -EFAULT; /* copy id */ if (copy_from_user(&data->id, &data32->id, sizeof(data->id))) - goto error; + return -EFAULT; /* we need to copy the item index. * hope this doesn't break anything.. */ if (get_user(data->value.enumerated.item, &data32->value.enumerated.item)) - goto error; + return -EFAULT; err = snd_ctl_elem_info(ctl, data); if (err < 0) - goto error; + return err; /* restore info to 32bit */ - err = -EFAULT; /* id, type, access, count */ if (copy_to_user(&data32->id, &data->id, sizeof(data->id)) || copy_to_user(&data32->type, &data->type, 3 * sizeof(u32))) - goto error; + return -EFAULT; if (put_user(data->owner, &data32->owner)) - goto error; + return -EFAULT; switch (data->type) { case SNDRV_CTL_ELEM_TYPE_BOOLEAN: case SNDRV_CTL_ELEM_TYPE_INTEGER: if (put_user(data->value.integer.min, &data32->value.integer.min) || put_user(data->value.integer.max, &data32->value.integer.max) || put_user(data->value.integer.step, &data32->value.integer.step)) - goto error; + return -EFAULT; break; case SNDRV_CTL_ELEM_TYPE_INTEGER64: if (copy_to_user(&data32->value.integer64, &data->value.integer64, sizeof(data->value.integer64))) - goto error; + return -EFAULT; break; case SNDRV_CTL_ELEM_TYPE_ENUMERATED: if (copy_to_user(&data32->value.enumerated, &data->value.enumerated, sizeof(data->value.enumerated))) - goto error; + return -EFAULT; break; default: break; } - err = 0; - error: - kfree(data); - return err; + return 0; } /* read / write */ @@ -169,31 +164,25 @@ static int get_ctl_type(struct snd_card *card, struct snd_ctl_elem_id *id, int *countp) { struct snd_kcontrol *kctl; - struct snd_ctl_elem_info *info; + struct snd_ctl_elem_info *info __free(kfree) = NULL; int err; - down_read(&card->controls_rwsem); + guard(rwsem_read)(&card->controls_rwsem); kctl = snd_ctl_find_id_locked(card, id); - if (! kctl) { - up_read(&card->controls_rwsem); + if (!kctl) return -ENOENT; - } info = kzalloc(sizeof(*info), GFP_KERNEL); - if (info == NULL) { - up_read(&card->controls_rwsem); + if (info == NULL) return -ENOMEM; - } info->id = *id; err = snd_power_ref_and_wait(card); if (!err) err = kctl->info(kctl, info); snd_power_unref(card); - up_read(&card->controls_rwsem); if (err >= 0) { err = info->type; *countp = info->count; } - kfree(info); return err; } @@ -289,7 +278,7 @@ static int copy_ctl_value_to_user(void __user *userdata, static int ctl_elem_read_user(struct snd_card *card, void __user *userdata, void __user *valuep) { - struct snd_ctl_elem_value *data; + struct snd_ctl_elem_value *data __free(kfree) = NULL; int err, type, count; data = kzalloc(sizeof(*data), GFP_KERNEL); @@ -299,21 +288,18 @@ static int ctl_elem_read_user(struct snd_card *card, err = copy_ctl_value_from_user(card, data, userdata, valuep, &type, &count); if (err < 0) - goto error; + return err; err = snd_ctl_elem_read(card, data); if (err < 0) - goto error; - err = copy_ctl_value_to_user(userdata, valuep, data, type, count); - error: - kfree(data); - return err; + return err; + return copy_ctl_value_to_user(userdata, valuep, data, type, count); } static int ctl_elem_write_user(struct snd_ctl_file *file, void __user *userdata, void __user *valuep) { - struct snd_ctl_elem_value *data; + struct snd_ctl_elem_value *data __free(kfree) = NULL; struct snd_card *card = file->card; int err, type, count; @@ -324,15 +310,12 @@ static int ctl_elem_write_user(struct snd_ctl_file *file, err = copy_ctl_value_from_user(card, data, userdata, valuep, &type, &count); if (err < 0) - goto error; + return err; err = snd_ctl_elem_write(card, file, data); if (err < 0) - goto error; - err = copy_ctl_value_to_user(userdata, valuep, data, type, count); - error: - kfree(data); - return err; + return err; + return copy_ctl_value_to_user(userdata, valuep, data, type, count); } static int snd_ctl_elem_read_user_compat(struct snd_card *card, @@ -366,49 +349,44 @@ static int snd_ctl_elem_add_compat(struct snd_ctl_file *file, struct snd_ctl_elem_info32 __user *data32, int replace) { - struct snd_ctl_elem_info *data; - int err; + struct snd_ctl_elem_info *data __free(kfree) = NULL; data = kzalloc(sizeof(*data), GFP_KERNEL); if (! data) return -ENOMEM; - err = -EFAULT; /* id, type, access, count */ \ if (copy_from_user(&data->id, &data32->id, sizeof(data->id)) || copy_from_user(&data->type, &data32->type, 3 * sizeof(u32))) - goto error; + return -EFAULT; if (get_user(data->owner, &data32->owner)) - goto error; + return -EFAULT; switch (data->type) { case SNDRV_CTL_ELEM_TYPE_BOOLEAN: case SNDRV_CTL_ELEM_TYPE_INTEGER: if (get_user(data->value.integer.min, &data32->value.integer.min) || get_user(data->value.integer.max, &data32->value.integer.max) || get_user(data->value.integer.step, &data32->value.integer.step)) - goto error; + return -EFAULT; break; case SNDRV_CTL_ELEM_TYPE_INTEGER64: if (copy_from_user(&data->value.integer64, &data32->value.integer64, sizeof(data->value.integer64))) - goto error; + return -EFAULT; break; case SNDRV_CTL_ELEM_TYPE_ENUMERATED: if (copy_from_user(&data->value.enumerated, &data32->value.enumerated, sizeof(data->value.enumerated))) - goto error; + return -EFAULT; data->value.enumerated.names_ptr = (uintptr_t)compat_ptr(data->value.enumerated.names_ptr); break; default: break; } - err = snd_ctl_elem_add(file, data, replace); - error: - kfree(data); - return err; + return snd_ctl_elem_add(file, data, replace); } enum { @@ -468,16 +446,13 @@ static inline long snd_ctl_ioctl_compat(struct file *file, unsigned int cmd, uns #endif /* CONFIG_X86_X32_ABI */ } - down_read(&snd_ioctl_rwsem); + guard(rwsem_read)(&snd_ioctl_rwsem); list_for_each_entry(p, &snd_control_compat_ioctls, list) { if (p->fioctl) { err = p->fioctl(ctl->card, ctl, cmd, arg); - if (err != -ENOIOCTLCMD) { - up_read(&snd_ioctl_rwsem); + if (err != -ENOIOCTLCMD) return err; - } } } - up_read(&snd_ioctl_rwsem); return -ENOIOCTLCMD; } diff --git a/sound/core/control_led.c b/sound/core/control_led.c index a78eb48927..3d37e9fa7b 100644 --- a/sound/core/control_led.c +++ b/sound/core/control_led.c @@ -147,29 +147,27 @@ static void snd_ctl_led_set_state(struct snd_card *card, unsigned int access, return; route = -1; found = false; - mutex_lock(&snd_ctl_led_mutex); - /* the card may not be registered (active) at this point */ - if (card && !snd_ctl_led_card_valid[card->number]) { - mutex_unlock(&snd_ctl_led_mutex); - return; - } - list_for_each_entry(lctl, &led->controls, list) { - if (lctl->kctl == kctl && lctl->index_offset == ioff) - found = true; - UPDATE_ROUTE(route, snd_ctl_led_get(lctl)); - } - if (!found && kctl && card) { - lctl = kzalloc(sizeof(*lctl), GFP_KERNEL); - if (lctl) { - lctl->card = card; - lctl->access = access; - lctl->kctl = kctl; - lctl->index_offset = ioff; - list_add(&lctl->list, &led->controls); + scoped_guard(mutex, &snd_ctl_led_mutex) { + /* the card may not be registered (active) at this point */ + if (card && !snd_ctl_led_card_valid[card->number]) + return; + list_for_each_entry(lctl, &led->controls, list) { + if (lctl->kctl == kctl && lctl->index_offset == ioff) + found = true; UPDATE_ROUTE(route, snd_ctl_led_get(lctl)); } + if (!found && kctl && card) { + lctl = kzalloc(sizeof(*lctl), GFP_KERNEL); + if (lctl) { + lctl->card = card; + lctl->access = access; + lctl->kctl = kctl; + lctl->index_offset = ioff; + list_add(&lctl->list, &led->controls); + UPDATE_ROUTE(route, snd_ctl_led_get(lctl)); + } + } } - mutex_unlock(&snd_ctl_led_mutex); switch (led->mode) { case MODE_OFF: route = 1; break; case MODE_ON: route = 0; break; @@ -201,14 +199,13 @@ static unsigned int snd_ctl_led_remove(struct snd_kcontrol *kctl, unsigned int i struct snd_ctl_led_ctl *lctl; unsigned int ret = 0; - mutex_lock(&snd_ctl_led_mutex); + guard(mutex)(&snd_ctl_led_mutex); lctl = snd_ctl_led_find(kctl, ioff); if (lctl && (access == 0 || access != lctl->access)) { ret = lctl->access; list_del(&lctl->list); kfree(lctl); } - mutex_unlock(&snd_ctl_led_mutex); return ret; } @@ -239,44 +236,36 @@ static void snd_ctl_led_notify(struct snd_card *card, unsigned int mask, } } +DEFINE_FREE(snd_card_unref, struct snd_card *, if (_T) snd_card_unref(_T)) + static int snd_ctl_led_set_id(int card_number, struct snd_ctl_elem_id *id, unsigned int group, bool set) { - struct snd_card *card; + struct snd_card *card __free(snd_card_unref) = NULL; struct snd_kcontrol *kctl; struct snd_kcontrol_volatile *vd; unsigned int ioff, access, new_access; - int err = 0; card = snd_card_ref(card_number); - if (card) { - down_write(&card->controls_rwsem); - kctl = snd_ctl_find_id_locked(card, id); - if (kctl) { - ioff = snd_ctl_get_ioff(kctl, id); - vd = &kctl->vd[ioff]; - access = vd->access & SNDRV_CTL_ELEM_ACCESS_LED_MASK; - if (access != 0 && access != group_to_access(group)) { - err = -EXDEV; - goto unlock; - } - new_access = vd->access & ~SNDRV_CTL_ELEM_ACCESS_LED_MASK; - if (set) - new_access |= group_to_access(group); - if (new_access != vd->access) { - vd->access = new_access; - snd_ctl_led_notify(card, SNDRV_CTL_EVENT_MASK_INFO, kctl, ioff); - } - } else { - err = -ENOENT; - } -unlock: - up_write(&card->controls_rwsem); - snd_card_unref(card); - } else { - err = -ENXIO; + if (!card) + return -ENXIO; + guard(rwsem_write)(&card->controls_rwsem); + kctl = snd_ctl_find_id_locked(card, id); + if (!kctl) + return -ENOENT; + ioff = snd_ctl_get_ioff(kctl, id); + vd = &kctl->vd[ioff]; + access = vd->access & SNDRV_CTL_ELEM_ACCESS_LED_MASK; + if (access != 0 && access != group_to_access(group)) + return -EXDEV; + new_access = vd->access & ~SNDRV_CTL_ELEM_ACCESS_LED_MASK; + if (set) + new_access |= group_to_access(group); + if (new_access != vd->access) { + vd->access = new_access; + snd_ctl_led_notify(card, SNDRV_CTL_EVENT_MASK_INFO, kctl, ioff); } - return err; + return 0; } static void snd_ctl_led_refresh(void) @@ -312,7 +301,7 @@ repeat: static int snd_ctl_led_reset(int card_number, unsigned int group) { - struct snd_card *card; + struct snd_card *card __free(snd_card_unref) = NULL; struct snd_ctl_led *led; struct snd_ctl_led_ctl *lctl; struct snd_kcontrol_volatile *vd; @@ -322,26 +311,22 @@ static int snd_ctl_led_reset(int card_number, unsigned int group) if (!card) return -ENXIO; - mutex_lock(&snd_ctl_led_mutex); - if (!snd_ctl_led_card_valid[card_number]) { - mutex_unlock(&snd_ctl_led_mutex); - snd_card_unref(card); - return -ENXIO; - } - led = &snd_ctl_leds[group]; + scoped_guard(mutex, &snd_ctl_led_mutex) { + if (!snd_ctl_led_card_valid[card_number]) + return -ENXIO; + led = &snd_ctl_leds[group]; repeat: - list_for_each_entry(lctl, &led->controls, list) - if (lctl->card == card) { - vd = &lctl->kctl->vd[lctl->index_offset]; - vd->access &= ~group_to_access(group); - snd_ctl_led_ctl_destroy(lctl); - change = true; - goto repeat; - } - mutex_unlock(&snd_ctl_led_mutex); + list_for_each_entry(lctl, &led->controls, list) + if (lctl->card == card) { + vd = &lctl->kctl->vd[lctl->index_offset]; + vd->access &= ~group_to_access(group); + snd_ctl_led_ctl_destroy(lctl); + change = true; + goto repeat; + } + } if (change) snd_ctl_led_set_state(NULL, group_to_access(group), NULL, 0); - snd_card_unref(card); return 0; } @@ -353,9 +338,8 @@ static void snd_ctl_led_register(struct snd_card *card) if (snd_BUG_ON(card->number < 0 || card->number >= ARRAY_SIZE(snd_ctl_led_card_valid))) return; - mutex_lock(&snd_ctl_led_mutex); - snd_ctl_led_card_valid[card->number] = true; - mutex_unlock(&snd_ctl_led_mutex); + scoped_guard(mutex, &snd_ctl_led_mutex) + snd_ctl_led_card_valid[card->number] = true; /* the register callback is already called with held card->controls_rwsem */ list_for_each_entry(kctl, &card->controls, list) for (ioff = 0; ioff < kctl->count; ioff++) @@ -367,10 +351,10 @@ static void snd_ctl_led_register(struct snd_card *card) static void snd_ctl_led_disconnect(struct snd_card *card) { snd_ctl_led_sysfs_remove(card); - mutex_lock(&snd_ctl_led_mutex); - snd_ctl_led_card_valid[card->number] = false; - snd_ctl_led_clean(card); - mutex_unlock(&snd_ctl_led_mutex); + scoped_guard(mutex, &snd_ctl_led_mutex) { + snd_ctl_led_card_valid[card->number] = false; + snd_ctl_led_clean(card); + } snd_ctl_led_refresh(); } @@ -430,9 +414,8 @@ static ssize_t mode_store(struct device *dev, else return count; - mutex_lock(&snd_ctl_led_mutex); - led->mode = mode; - mutex_unlock(&snd_ctl_led_mutex); + scoped_guard(mutex, &snd_ctl_led_mutex) + led->mode = mode; snd_ctl_led_set_state(NULL, group_to_access(led->group), NULL, 0); return count; @@ -615,15 +598,15 @@ static ssize_t list_show(struct device *dev, struct device_attribute *attr, char *buf) { struct snd_ctl_led_card *led_card = container_of(dev, struct snd_ctl_led_card, dev); - struct snd_card *card; + struct snd_card *card __free(snd_card_unref) = NULL; struct snd_ctl_led_ctl *lctl; size_t l = 0; card = snd_card_ref(led_card->number); if (!card) return -ENXIO; - down_read(&card->controls_rwsem); - mutex_lock(&snd_ctl_led_mutex); + guard(rwsem_read)(&card->controls_rwsem); + guard(mutex)(&snd_ctl_led_mutex); if (snd_ctl_led_card_valid[led_card->number]) { list_for_each_entry(lctl, &led_card->led->controls, list) { if (lctl->card != card) @@ -634,9 +617,6 @@ static ssize_t list_show(struct device *dev, lctl->kctl->id.numid + lctl->index_offset); } } - mutex_unlock(&snd_ctl_led_mutex); - up_read(&card->controls_rwsem); - snd_card_unref(card); return l; } diff --git a/sound/core/hrtimer.c b/sound/core/hrtimer.c index e97ff8cccb..147c1fea47 100644 --- a/sound/core/hrtimer.c +++ b/sound/core/hrtimer.c @@ -35,12 +35,12 @@ static enum hrtimer_restart snd_hrtimer_callback(struct hrtimer *hrt) unsigned long ticks; enum hrtimer_restart ret = HRTIMER_NORESTART; - spin_lock(&t->lock); - if (!t->running) - goto out; /* fast path */ - stime->in_callback = true; - ticks = t->sticks; - spin_unlock(&t->lock); + scoped_guard(spinlock, &t->lock) { + if (!t->running) + return HRTIMER_NORESTART; /* fast path */ + stime->in_callback = true; + ticks = t->sticks; + } /* calculate the drift */ delta = ktime_sub(hrt->base->get_time(), hrtimer_get_expires(hrt)); @@ -49,15 +49,13 @@ static enum hrtimer_restart snd_hrtimer_callback(struct hrtimer *hrt) snd_timer_interrupt(stime->timer, ticks); - spin_lock(&t->lock); + guard(spinlock)(&t->lock); if (t->running) { hrtimer_add_expires_ns(hrt, t->sticks * resolution); ret = HRTIMER_RESTART; } stime->in_callback = false; - out: - spin_unlock(&t->lock); return ret; } @@ -80,10 +78,10 @@ static int snd_hrtimer_close(struct snd_timer *t) struct snd_hrtimer *stime = t->private_data; if (stime) { - spin_lock_irq(&t->lock); - t->running = 0; /* just to be sure */ - stime->in_callback = 1; /* skip start/stop */ - spin_unlock_irq(&t->lock); + scoped_guard(spinlock_irq, &t->lock) { + t->running = 0; /* just to be sure */ + stime->in_callback = 1; /* skip start/stop */ + } hrtimer_cancel(&stime->hrt); kfree(stime); diff --git a/sound/core/hwdep.c b/sound/core/hwdep.c index de7476034f..09200df293 100644 --- a/sound/core/hwdep.c +++ b/sound/core/hwdep.c @@ -149,12 +149,12 @@ static int snd_hwdep_release(struct inode *inode, struct file * file) struct snd_hwdep *hw = file->private_data; struct module *mod = hw->card->module; - mutex_lock(&hw->open_mutex); - if (hw->ops.release) - err = hw->ops.release(hw, file); - if (hw->used > 0) - hw->used--; - mutex_unlock(&hw->open_mutex); + scoped_guard(mutex, &hw->open_mutex) { + if (hw->ops.release) + err = hw->ops.release(hw, file); + if (hw->used > 0) + hw->used--; + } wake_up(&hw->open_wait); snd_card_file_remove(hw->card, file); @@ -272,23 +272,23 @@ static int snd_hwdep_control_ioctl(struct snd_card *card, if (get_user(device, (int __user *)arg)) return -EFAULT; - mutex_lock(®ister_mutex); - - if (device < 0) - device = 0; - else if (device < SNDRV_MINOR_HWDEPS) - device++; - else - device = SNDRV_MINOR_HWDEPS; - - while (device < SNDRV_MINOR_HWDEPS) { - if (snd_hwdep_search(card, device)) - break; - device++; + + scoped_guard(mutex, ®ister_mutex) { + if (device < 0) + device = 0; + else if (device < SNDRV_MINOR_HWDEPS) + device++; + else + device = SNDRV_MINOR_HWDEPS; + + while (device < SNDRV_MINOR_HWDEPS) { + if (snd_hwdep_search(card, device)) + break; + device++; + } + if (device >= SNDRV_MINOR_HWDEPS) + device = -1; } - if (device >= SNDRV_MINOR_HWDEPS) - device = -1; - mutex_unlock(®ister_mutex); if (put_user(device, (int __user *)arg)) return -EFAULT; return 0; @@ -296,19 +296,18 @@ static int snd_hwdep_control_ioctl(struct snd_card *card, case SNDRV_CTL_IOCTL_HWDEP_INFO: { struct snd_hwdep_info __user *info = (struct snd_hwdep_info __user *)arg; - int device, err; + int device; struct snd_hwdep *hwdep; if (get_user(device, &info->device)) return -EFAULT; - mutex_lock(®ister_mutex); - hwdep = snd_hwdep_search(card, device); - if (hwdep) - err = snd_hwdep_info(hwdep, info); - else - err = -ENXIO; - mutex_unlock(®ister_mutex); - return err; + scoped_guard(mutex, ®ister_mutex) { + hwdep = snd_hwdep_search(card, device); + if (!hwdep) + return -ENXIO; + return snd_hwdep_info(hwdep, info); + } + break; } } return -ENOIOCTLCMD; @@ -422,11 +421,9 @@ static int snd_hwdep_dev_register(struct snd_device *device) struct snd_card *card = hwdep->card; int err; - mutex_lock(®ister_mutex); - if (snd_hwdep_search(card, hwdep->device)) { - mutex_unlock(®ister_mutex); + guard(mutex)(®ister_mutex); + if (snd_hwdep_search(card, hwdep->device)) return -EBUSY; - } list_add_tail(&hwdep->list, &snd_hwdep_devices); err = snd_register_device(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card, hwdep->device, @@ -434,7 +431,6 @@ static int snd_hwdep_dev_register(struct snd_device *device) if (err < 0) { dev_err(hwdep->dev, "unable to register\n"); list_del(&hwdep->list); - mutex_unlock(®ister_mutex); return err; } @@ -454,7 +450,6 @@ static int snd_hwdep_dev_register(struct snd_device *device) hwdep->ossreg = 1; } #endif - mutex_unlock(®ister_mutex); return 0; } @@ -464,12 +459,10 @@ static int snd_hwdep_dev_disconnect(struct snd_device *device) if (snd_BUG_ON(!hwdep)) return -ENXIO; - mutex_lock(®ister_mutex); - if (snd_hwdep_search(hwdep->card, hwdep->device) != hwdep) { - mutex_unlock(®ister_mutex); + guard(mutex)(®ister_mutex); + if (snd_hwdep_search(hwdep->card, hwdep->device) != hwdep) return -EINVAL; - } - mutex_lock(&hwdep->open_mutex); + guard(mutex)(&hwdep->open_mutex); wake_up(&hwdep->open_wait); #ifdef CONFIG_SND_OSSEMUL if (hwdep->ossreg) @@ -477,8 +470,6 @@ static int snd_hwdep_dev_disconnect(struct snd_device *device) #endif snd_unregister_device(hwdep->dev); list_del_init(&hwdep->list); - mutex_unlock(&hwdep->open_mutex); - mutex_unlock(®ister_mutex); return 0; } @@ -492,11 +483,10 @@ static void snd_hwdep_proc_read(struct snd_info_entry *entry, { struct snd_hwdep *hwdep; - mutex_lock(®ister_mutex); + guard(mutex)(®ister_mutex); list_for_each_entry(hwdep, &snd_hwdep_devices, list) snd_iprintf(buffer, "%02i-%02i: %s\n", hwdep->card->number, hwdep->device, hwdep->name); - mutex_unlock(®ister_mutex); } static struct snd_info_entry *snd_hwdep_proc_entry; diff --git a/sound/core/info.c b/sound/core/info.c index e2f302e55b..1f5b8a3d9e 100644 --- a/sound/core/info.c +++ b/sound/core/info.c @@ -105,17 +105,15 @@ static loff_t snd_info_entry_llseek(struct file *file, loff_t offset, int orig) { struct snd_info_private_data *data; struct snd_info_entry *entry; - loff_t ret = -EINVAL, size; + loff_t size; data = file->private_data; entry = data->entry; - mutex_lock(&entry->access); - if (entry->c.ops->llseek) { - ret = entry->c.ops->llseek(entry, - data->file_private_data, - file, offset, orig); - goto out; - } + guard(mutex)(&entry->access); + if (entry->c.ops->llseek) + return entry->c.ops->llseek(entry, + data->file_private_data, + file, offset, orig); size = entry->size; switch (orig) { @@ -126,21 +124,18 @@ static loff_t snd_info_entry_llseek(struct file *file, loff_t offset, int orig) break; case SEEK_END: if (!size) - goto out; + return -EINVAL; offset += size; break; default: - goto out; + return -EINVAL; } if (offset < 0) - goto out; + return -EINVAL; if (size && offset > size) offset = size; file->f_pos = offset; - ret = offset; - out: - mutex_unlock(&entry->access); - return ret; + return offset; } static ssize_t snd_info_entry_read(struct file *file, char __user *buffer, @@ -238,10 +233,10 @@ static int snd_info_entry_open(struct inode *inode, struct file *file) struct snd_info_private_data *data; int mode, err; - mutex_lock(&info_mutex); + guard(mutex)(&info_mutex); err = alloc_info_private(entry, &data); if (err < 0) - goto unlock; + return err; mode = file->f_flags & O_ACCMODE; if (((mode == O_RDONLY || mode == O_RDWR) && !entry->c.ops->read) || @@ -257,14 +252,11 @@ static int snd_info_entry_open(struct inode *inode, struct file *file) } file->private_data = data; - mutex_unlock(&info_mutex); return 0; error: kfree(data); module_put(entry->module); - unlock: - mutex_unlock(&info_mutex); return err; } @@ -306,7 +298,6 @@ static ssize_t snd_info_text_entry_write(struct file *file, struct snd_info_buffer *buf; loff_t pos; size_t next; - int err = 0; if (!entry->c.text.write) return -EIO; @@ -317,34 +308,24 @@ static ssize_t snd_info_text_entry_write(struct file *file, /* don't handle too large text inputs */ if (next > 16 * 1024) return -EIO; - mutex_lock(&entry->access); + guard(mutex)(&entry->access); buf = data->wbuffer; if (!buf) { data->wbuffer = buf = kzalloc(sizeof(*buf), GFP_KERNEL); - if (!buf) { - err = -ENOMEM; - goto error; - } + if (!buf) + return -ENOMEM; } if (next > buf->len) { char *nbuf = kvzalloc(PAGE_ALIGN(next), GFP_KERNEL); - if (!nbuf) { - err = -ENOMEM; - goto error; - } + if (!nbuf) + return -ENOMEM; kvfree(buf->buffer); buf->buffer = nbuf; buf->len = PAGE_ALIGN(next); } - if (copy_from_user(buf->buffer + pos, buffer, count)) { - err = -EFAULT; - goto error; - } + if (copy_from_user(buf->buffer + pos, buffer, count)) + return -EFAULT; buf->size = next; - error: - mutex_unlock(&entry->access); - if (err < 0) - return err; *offset = next; return count; } @@ -369,10 +350,10 @@ static int snd_info_text_entry_open(struct inode *inode, struct file *file) struct snd_info_private_data *data; int err; - mutex_lock(&info_mutex); + guard(mutex)(&info_mutex); err = alloc_info_private(entry, &data); if (err < 0) - goto unlock; + return err; data->rbuffer = kzalloc(sizeof(*data->rbuffer), GFP_KERNEL); if (!data->rbuffer) { @@ -386,15 +367,12 @@ static int snd_info_text_entry_open(struct inode *inode, struct file *file) err = single_open(file, snd_info_seq_show, data); if (err < 0) goto error; - mutex_unlock(&info_mutex); return 0; error: kfree(data->rbuffer); kfree(data); module_put(entry->module); - unlock: - mutex_unlock(&info_mutex); return err; } @@ -549,7 +527,7 @@ int snd_info_card_register(struct snd_card *card) */ void snd_info_card_id_change(struct snd_card *card) { - mutex_lock(&info_mutex); + guard(mutex)(&info_mutex); if (card->proc_root_link) { proc_remove(card->proc_root_link); card->proc_root_link = NULL; @@ -558,7 +536,6 @@ void snd_info_card_id_change(struct snd_card *card) card->proc_root_link = proc_symlink(card->id, snd_proc_root->p, card->proc_root->name); - mutex_unlock(&info_mutex); } /* @@ -574,12 +551,11 @@ void snd_info_card_disconnect(struct snd_card *card) if (card->proc_root) proc_remove(card->proc_root->p); - mutex_lock(&info_mutex); + guard(mutex)(&info_mutex); if (card->proc_root) snd_info_clear_entries(card->proc_root); card->proc_root_link = NULL; card->proc_root = NULL; - mutex_unlock(&info_mutex); } /* @@ -703,9 +679,8 @@ snd_info_create_entry(const char *name, struct snd_info_entry *parent, entry->parent = parent; entry->module = module; if (parent) { - mutex_lock(&parent->access); + guard(mutex)(&parent->access); list_add_tail(&entry->list, &parent->children); - mutex_unlock(&parent->access); } return entry; } @@ -775,9 +750,8 @@ void snd_info_free_entry(struct snd_info_entry * entry) return; if (entry->p) { proc_remove(entry->p); - mutex_lock(&info_mutex); + guard(mutex)(&info_mutex); snd_info_clear_entries(entry); - mutex_unlock(&info_mutex); } /* free all children at first */ @@ -786,9 +760,8 @@ void snd_info_free_entry(struct snd_info_entry * entry) p = entry->parent; if (p) { - mutex_lock(&p->access); + guard(mutex)(&p->access); list_del(&entry->list); - mutex_unlock(&p->access); } kfree(entry->name); if (entry->private_free) @@ -804,15 +777,13 @@ static int __snd_info_register(struct snd_info_entry *entry) if (snd_BUG_ON(!entry)) return -ENXIO; root = entry->parent == NULL ? snd_proc_root->p : entry->parent->p; - mutex_lock(&info_mutex); + guard(mutex)(&info_mutex); if (entry->p || !root) - goto unlock; + return 0; if (S_ISDIR(entry->mode)) { p = proc_mkdir_mode(entry->name, entry->mode, root); - if (!p) { - mutex_unlock(&info_mutex); + if (!p) return -ENOMEM; - } } else { const struct proc_ops *ops; if (entry->content == SNDRV_INFO_CONTENT_DATA) @@ -821,15 +792,11 @@ static int __snd_info_register(struct snd_info_entry *entry) ops = &snd_info_text_entry_ops; p = proc_create_data(entry->name, entry->mode, root, ops, entry); - if (!p) { - mutex_unlock(&info_mutex); + if (!p) return -ENOMEM; - } proc_set_size(p, entry->size); } entry->p = p; - unlock: - mutex_unlock(&info_mutex); return 0; } diff --git a/sound/core/info_oss.c b/sound/core/info_oss.c index ebc714b2f4..0dbbb80055 100644 --- a/sound/core/info_oss.c +++ b/sound/core/info_oss.c @@ -29,20 +29,17 @@ int snd_oss_info_register(int dev, int num, char *string) return -ENXIO; if (snd_BUG_ON(num < 0 || num >= SNDRV_CARDS)) return -ENXIO; - mutex_lock(&strings); + guard(mutex)(&strings); if (string == NULL) { x = snd_sndstat_strings[num][dev]; kfree(x); x = NULL; } else { x = kstrdup(string, GFP_KERNEL); - if (x == NULL) { - mutex_unlock(&strings); + if (x == NULL) return -ENOMEM; - } } snd_sndstat_strings[num][dev] = x; - mutex_unlock(&strings); return 0; } EXPORT_SYMBOL(snd_oss_info_register); @@ -53,7 +50,7 @@ static int snd_sndstat_show_strings(struct snd_info_buffer *buf, char *id, int d char *str; snd_iprintf(buf, "\n%s:", id); - mutex_lock(&strings); + guard(mutex)(&strings); for (idx = 0; idx < SNDRV_CARDS; idx++) { str = snd_sndstat_strings[idx][dev]; if (str) { @@ -64,7 +61,6 @@ static int snd_sndstat_show_strings(struct snd_info_buffer *buf, char *id, int d snd_iprintf(buf, "%i: %s\n", idx, str); } } - mutex_unlock(&strings); if (ok < 0) snd_iprintf(buf, " NOT ENABLED IN CONFIG\n"); return ok; diff --git a/sound/core/init.c b/sound/core/init.c index d97b8af897..b8912de048 100644 --- a/sound/core/init.c +++ b/sound/core/init.c @@ -284,30 +284,31 @@ static int snd_card_init(struct snd_card *card, struct device *parent, if (xid) strscpy(card->id, xid, sizeof(card->id)); err = 0; - mutex_lock(&snd_card_mutex); - if (idx < 0) /* first check the matching module-name slot */ - idx = get_slot_from_bitmask(idx, module_slot_match, module); - if (idx < 0) /* if not matched, assign an empty slot */ - idx = get_slot_from_bitmask(idx, check_empty_slot, module); - if (idx < 0) - err = -ENODEV; - else if (idx < snd_ecards_limit) { - if (test_bit(idx, snd_cards_lock)) - err = -EBUSY; /* invalid */ - } else if (idx >= SNDRV_CARDS) - err = -ENODEV; + scoped_guard(mutex, &snd_card_mutex) { + if (idx < 0) /* first check the matching module-name slot */ + idx = get_slot_from_bitmask(idx, module_slot_match, module); + if (idx < 0) /* if not matched, assign an empty slot */ + idx = get_slot_from_bitmask(idx, check_empty_slot, module); + if (idx < 0) + err = -ENODEV; + else if (idx < snd_ecards_limit) { + if (test_bit(idx, snd_cards_lock)) + err = -EBUSY; /* invalid */ + } else if (idx >= SNDRV_CARDS) + err = -ENODEV; + if (!err) { + set_bit(idx, snd_cards_lock); /* lock it */ + if (idx >= snd_ecards_limit) + snd_ecards_limit = idx + 1; /* increase the limit */ + } + } if (err < 0) { - mutex_unlock(&snd_card_mutex); dev_err(parent, "cannot find the slot for index %d (range 0-%i), error: %d\n", - idx, snd_ecards_limit - 1, err); + idx, snd_ecards_limit - 1, err); if (!card->managed) kfree(card); /* manually free here, as no destructor called */ return err; } - set_bit(idx, snd_cards_lock); /* lock it */ - if (idx >= snd_ecards_limit) - snd_ecards_limit = idx + 1; /* increase the limit */ - mutex_unlock(&snd_card_mutex); card->dev = parent; card->number = idx; #ifdef MODULE @@ -386,11 +387,10 @@ struct snd_card *snd_card_ref(int idx) { struct snd_card *card; - mutex_lock(&snd_card_mutex); + guard(mutex)(&snd_card_mutex); card = snd_cards[idx]; if (card) get_device(&card->card_dev); - mutex_unlock(&snd_card_mutex); return card; } EXPORT_SYMBOL_GPL(snd_card_ref); @@ -398,12 +398,8 @@ EXPORT_SYMBOL_GPL(snd_card_ref); /* return non-zero if a card is already locked */ int snd_card_locked(int card) { - int locked; - - mutex_lock(&snd_card_mutex); - locked = test_bit(card, snd_cards_lock); - mutex_unlock(&snd_card_mutex); - return locked; + guard(mutex)(&snd_card_mutex); + return test_bit(card, snd_cards_lock); } static loff_t snd_disconnect_llseek(struct file *file, loff_t offset, int orig) @@ -427,15 +423,15 @@ static int snd_disconnect_release(struct inode *inode, struct file *file) { struct snd_monitor_file *df = NULL, *_df; - spin_lock(&shutdown_lock); - list_for_each_entry(_df, &shutdown_files, shutdown_list) { - if (_df->file == file) { - df = _df; - list_del_init(&df->shutdown_list); - break; + scoped_guard(spinlock, &shutdown_lock) { + list_for_each_entry(_df, &shutdown_files, shutdown_list) { + if (_df->file == file) { + df = _df; + list_del_init(&df->shutdown_list); + break; + } } } - spin_unlock(&shutdown_lock); if (likely(df)) { if ((file->f_flags & FASYNC) && df->disconnected_f_op->fasync) @@ -501,27 +497,24 @@ void snd_card_disconnect(struct snd_card *card) if (!card) return; - spin_lock(&card->files_lock); - if (card->shutdown) { - spin_unlock(&card->files_lock); - return; - } - card->shutdown = 1; + scoped_guard(spinlock, &card->files_lock) { + if (card->shutdown) + return; + card->shutdown = 1; - /* replace file->f_op with special dummy operations */ - list_for_each_entry(mfile, &card->files_list, list) { - /* it's critical part, use endless loop */ - /* we have no room to fail */ - mfile->disconnected_f_op = mfile->file->f_op; + /* replace file->f_op with special dummy operations */ + list_for_each_entry(mfile, &card->files_list, list) { + /* it's critical part, use endless loop */ + /* we have no room to fail */ + mfile->disconnected_f_op = mfile->file->f_op; - spin_lock(&shutdown_lock); - list_add(&mfile->shutdown_list, &shutdown_files); - spin_unlock(&shutdown_lock); + scoped_guard(spinlock, &shutdown_lock) + list_add(&mfile->shutdown_list, &shutdown_files); - mfile->file->f_op = &snd_shutdown_f_ops; - fops_get(mfile->file->f_op); + mfile->file->f_op = &snd_shutdown_f_ops; + fops_get(mfile->file->f_op); + } } - spin_unlock(&card->files_lock); #ifdef CONFIG_PM /* wake up sleepers here before other callbacks for avoiding potential @@ -546,16 +539,21 @@ void snd_card_disconnect(struct snd_card *card) synchronize_irq(card->sync_irq); snd_info_card_disconnect(card); +#ifdef CONFIG_SND_DEBUG + debugfs_remove(card->debugfs_root); + card->debugfs_root = NULL; +#endif + if (card->registered) { device_del(&card->card_dev); card->registered = false; } /* disable fops (user space) operations for ALSA API */ - mutex_lock(&snd_card_mutex); - snd_cards[card->number] = NULL; - clear_bit(card->number, snd_cards_lock); - mutex_unlock(&snd_card_mutex); + scoped_guard(mutex, &snd_card_mutex) { + snd_cards[card->number] = NULL; + clear_bit(card->number, snd_cards_lock); + } #ifdef CONFIG_PM snd_power_sync_ref(card); @@ -576,11 +574,10 @@ void snd_card_disconnect_sync(struct snd_card *card) { snd_card_disconnect(card); - spin_lock_irq(&card->files_lock); + guard(spinlock_irq)(&card->files_lock); wait_event_lock_irq(card->remove_sleep, list_empty(&card->files_list), card->files_lock); - spin_unlock_irq(&card->files_lock); } EXPORT_SYMBOL_GPL(snd_card_disconnect_sync); @@ -598,10 +595,6 @@ static int snd_card_do_free(struct snd_card *card) dev_warn(card->dev, "unable to free card info\n"); /* Not fatal error */ } -#ifdef CONFIG_SND_DEBUG - debugfs_remove(card->debugfs_root); - card->debugfs_root = NULL; -#endif if (card->release_completion) complete(card->release_completion); if (!card->managed) @@ -774,9 +767,8 @@ void snd_card_set_id(struct snd_card *card, const char *nid) /* check if user specified own card->id */ if (card->id[0] != '\0') return; - mutex_lock(&snd_card_mutex); + guard(mutex)(&snd_card_mutex); snd_card_set_id_no_lock(card, nid, nid); - mutex_unlock(&snd_card_mutex); } EXPORT_SYMBOL(snd_card_set_id); @@ -804,14 +796,11 @@ static ssize_t id_store(struct device *dev, struct device_attribute *attr, } memcpy(buf1, buf, copy); buf1[copy] = '\0'; - mutex_lock(&snd_card_mutex); - if (!card_id_ok(NULL, buf1)) { - mutex_unlock(&snd_card_mutex); + guard(mutex)(&snd_card_mutex); + if (!card_id_ok(NULL, buf1)) return -EEXIST; - } strcpy(card->id, buf1); snd_info_card_id_change(card); - mutex_unlock(&snd_card_mutex); return count; } @@ -904,26 +893,27 @@ int snd_card_register(struct snd_card *card) err = snd_device_register_all(card); if (err < 0) return err; - mutex_lock(&snd_card_mutex); - if (snd_cards[card->number]) { - /* already registered */ - mutex_unlock(&snd_card_mutex); - return snd_info_card_register(card); /* register pending info */ - } - if (*card->id) { - /* make a unique id name from the given string */ - char tmpid[sizeof(card->id)]; - memcpy(tmpid, card->id, sizeof(card->id)); - snd_card_set_id_no_lock(card, tmpid, tmpid); - } else { - /* create an id from either shortname or longname */ - const char *src; - src = *card->shortname ? card->shortname : card->longname; - snd_card_set_id_no_lock(card, src, - retrieve_id_from_card_name(src)); + scoped_guard(mutex, &snd_card_mutex) { + if (snd_cards[card->number]) { + /* already registered */ + return snd_info_card_register(card); /* register pending info */ + } + if (*card->id) { + /* make a unique id name from the given string */ + char tmpid[sizeof(card->id)]; + + memcpy(tmpid, card->id, sizeof(card->id)); + snd_card_set_id_no_lock(card, tmpid, tmpid); + } else { + /* create an id from either shortname or longname */ + const char *src; + + src = *card->shortname ? card->shortname : card->longname; + snd_card_set_id_no_lock(card, src, + retrieve_id_from_card_name(src)); + } + snd_cards[card->number] = card; } - snd_cards[card->number] = card; - mutex_unlock(&snd_card_mutex); err = snd_info_card_register(card); if (err < 0) return err; @@ -944,7 +934,7 @@ static void snd_card_info_read(struct snd_info_entry *entry, struct snd_card *card; for (idx = count = 0; idx < SNDRV_CARDS; idx++) { - mutex_lock(&snd_card_mutex); + guard(mutex)(&snd_card_mutex); card = snd_cards[idx]; if (card) { count++; @@ -956,7 +946,6 @@ static void snd_card_info_read(struct snd_info_entry *entry, snd_iprintf(buffer, " %s\n", card->longname); } - mutex_unlock(&snd_card_mutex); } if (!count) snd_iprintf(buffer, "--- no soundcards ---\n"); @@ -969,13 +958,12 @@ void snd_card_info_read_oss(struct snd_info_buffer *buffer) struct snd_card *card; for (idx = count = 0; idx < SNDRV_CARDS; idx++) { - mutex_lock(&snd_card_mutex); + guard(mutex)(&snd_card_mutex); card = snd_cards[idx]; if (card) { count++; snd_iprintf(buffer, "%s\n", card->longname); } - mutex_unlock(&snd_card_mutex); } if (!count) { snd_iprintf(buffer, "--- no soundcards ---\n"); @@ -992,12 +980,11 @@ static void snd_card_module_info_read(struct snd_info_entry *entry, struct snd_card *card; for (idx = 0; idx < SNDRV_CARDS; idx++) { - mutex_lock(&snd_card_mutex); + guard(mutex)(&snd_card_mutex); card = snd_cards[idx]; if (card) snd_iprintf(buffer, "%2i %s\n", idx, card->module->name); - mutex_unlock(&snd_card_mutex); } } #endif @@ -1079,15 +1066,13 @@ int snd_card_file_add(struct snd_card *card, struct file *file) mfile->file = file; mfile->disconnected_f_op = NULL; INIT_LIST_HEAD(&mfile->shutdown_list); - spin_lock(&card->files_lock); + guard(spinlock)(&card->files_lock); if (card->shutdown) { - spin_unlock(&card->files_lock); kfree(mfile); return -ENODEV; } list_add(&mfile->list, &card->files_list); get_device(&card->card_dev); - spin_unlock(&card->files_lock); return 0; } EXPORT_SYMBOL(snd_card_file_add); @@ -1109,22 +1094,21 @@ int snd_card_file_remove(struct snd_card *card, struct file *file) { struct snd_monitor_file *mfile, *found = NULL; - spin_lock(&card->files_lock); - list_for_each_entry(mfile, &card->files_list, list) { - if (mfile->file == file) { - list_del(&mfile->list); - spin_lock(&shutdown_lock); - list_del(&mfile->shutdown_list); - spin_unlock(&shutdown_lock); - if (mfile->disconnected_f_op) - fops_put(mfile->disconnected_f_op); - found = mfile; - break; + scoped_guard(spinlock, &card->files_lock) { + list_for_each_entry(mfile, &card->files_list, list) { + if (mfile->file == file) { + list_del(&mfile->list); + scoped_guard(spinlock, &shutdown_lock) + list_del(&mfile->shutdown_list); + if (mfile->disconnected_f_op) + fops_put(mfile->disconnected_f_op); + found = mfile; + break; + } } + if (list_empty(&card->files_list)) + wake_up_all(&card->remove_sleep); } - if (list_empty(&card->files_list)) - wake_up_all(&card->remove_sleep); - spin_unlock(&card->files_lock); if (!found) { dev_err(card->dev, "card file remove problem (%p)\n", file); return -ENOENT; diff --git a/sound/core/jack.c b/sound/core/jack.c index e0f034e727..e4bcecdf89 100644 --- a/sound/core/jack.c +++ b/sound/core/jack.c @@ -37,16 +37,18 @@ static const int jack_switch_types[SND_JACK_SWITCH_TYPES] = { }; #endif /* CONFIG_SND_JACK_INPUT_DEV */ +static void snd_jack_remove_debugfs(struct snd_jack *jack); + static int snd_jack_dev_disconnect(struct snd_device *device) { -#ifdef CONFIG_SND_JACK_INPUT_DEV struct snd_jack *jack = device->device_data; - mutex_lock(&jack->input_dev_lock); - if (!jack->input_dev) { - mutex_unlock(&jack->input_dev_lock); + snd_jack_remove_debugfs(jack); + +#ifdef CONFIG_SND_JACK_INPUT_DEV + guard(mutex)(&jack->input_dev_lock); + if (!jack->input_dev) return 0; - } /* If the input device is registered with the input subsystem * then we need to use a different deallocator. */ @@ -55,7 +57,6 @@ static int snd_jack_dev_disconnect(struct snd_device *device) else input_free_device(jack->input_dev); jack->input_dev = NULL; - mutex_unlock(&jack->input_dev_lock); #endif /* CONFIG_SND_JACK_INPUT_DEV */ return 0; } @@ -92,11 +93,9 @@ static int snd_jack_dev_register(struct snd_device *device) snprintf(jack->name, sizeof(jack->name), "%s %s", card->shortname, jack->id); - mutex_lock(&jack->input_dev_lock); - if (!jack->input_dev) { - mutex_unlock(&jack->input_dev_lock); + guard(mutex)(&jack->input_dev_lock); + if (!jack->input_dev) return 0; - } jack->input_dev->name = jack->name; @@ -121,7 +120,6 @@ static int snd_jack_dev_register(struct snd_device *device) if (err == 0) jack->registered = 1; - mutex_unlock(&jack->input_dev_lock); return err; } #endif /* CONFIG_SND_JACK_INPUT_DEV */ @@ -387,10 +385,14 @@ static int snd_jack_debugfs_add_inject_node(struct snd_jack *jack, return 0; } -static void snd_jack_debugfs_clear_inject_node(struct snd_jack_kctl *jack_kctl) +static void snd_jack_remove_debugfs(struct snd_jack *jack) { - debugfs_remove(jack_kctl->jack_debugfs_root); - jack_kctl->jack_debugfs_root = NULL; + struct snd_jack_kctl *jack_kctl; + + list_for_each_entry(jack_kctl, &jack->kctl_list, list) { + debugfs_remove(jack_kctl->jack_debugfs_root); + jack_kctl->jack_debugfs_root = NULL; + } } #else /* CONFIG_SND_JACK_INJECTION_DEBUG */ static int snd_jack_debugfs_add_inject_node(struct snd_jack *jack, @@ -399,7 +401,7 @@ static int snd_jack_debugfs_add_inject_node(struct snd_jack *jack, return 0; } -static void snd_jack_debugfs_clear_inject_node(struct snd_jack_kctl *jack_kctl) +static void snd_jack_remove_debugfs(struct snd_jack *jack) { } #endif /* CONFIG_SND_JACK_INJECTION_DEBUG */ @@ -410,7 +412,6 @@ static void snd_jack_kctl_private_free(struct snd_kcontrol *kctl) jack_kctl = kctl->private_data; if (jack_kctl) { - snd_jack_debugfs_clear_inject_node(jack_kctl); list_del(&jack_kctl->list); kfree(jack_kctl); } @@ -503,8 +504,8 @@ int snd_jack_new(struct snd_card *card, const char *id, int type, .dev_free = snd_jack_dev_free, #ifdef CONFIG_SND_JACK_INPUT_DEV .dev_register = snd_jack_dev_register, - .dev_disconnect = snd_jack_dev_disconnect, #endif /* CONFIG_SND_JACK_INPUT_DEV */ + .dev_disconnect = snd_jack_dev_disconnect, }; if (initial_kctl) { @@ -586,14 +587,9 @@ EXPORT_SYMBOL(snd_jack_new); void snd_jack_set_parent(struct snd_jack *jack, struct device *parent) { WARN_ON(jack->registered); - mutex_lock(&jack->input_dev_lock); - if (!jack->input_dev) { - mutex_unlock(&jack->input_dev_lock); - return; - } - - jack->input_dev->dev.parent = parent; - mutex_unlock(&jack->input_dev_lock); + guard(mutex)(&jack->input_dev_lock); + if (jack->input_dev) + jack->input_dev->dev.parent = parent; } EXPORT_SYMBOL(snd_jack_set_parent); diff --git a/sound/core/oss/mixer_oss.c b/sound/core/oss/mixer_oss.c index dae2da3808..6a0508093e 100644 --- a/sound/core/oss/mixer_oss.c +++ b/sound/core/oss/mixer_oss.c @@ -130,13 +130,12 @@ static int snd_mixer_oss_devmask(struct snd_mixer_oss_file *fmixer) if (mixer == NULL) return -EIO; - mutex_lock(&mixer->reg_mutex); + guard(mutex)(&mixer->reg_mutex); for (chn = 0; chn < 31; chn++) { pslot = &mixer->slots[chn]; if (pslot->put_volume || pslot->put_recsrc) result |= 1 << chn; } - mutex_unlock(&mixer->reg_mutex); return result; } @@ -148,13 +147,12 @@ static int snd_mixer_oss_stereodevs(struct snd_mixer_oss_file *fmixer) if (mixer == NULL) return -EIO; - mutex_lock(&mixer->reg_mutex); + guard(mutex)(&mixer->reg_mutex); for (chn = 0; chn < 31; chn++) { pslot = &mixer->slots[chn]; if (pslot->put_volume && pslot->stereo) result |= 1 << chn; } - mutex_unlock(&mixer->reg_mutex); return result; } @@ -165,7 +163,7 @@ static int snd_mixer_oss_recmask(struct snd_mixer_oss_file *fmixer) if (mixer == NULL) return -EIO; - mutex_lock(&mixer->reg_mutex); + guard(mutex)(&mixer->reg_mutex); if (mixer->put_recsrc && mixer->get_recsrc) { /* exclusive */ result = mixer->mask_recsrc; } else { @@ -177,7 +175,6 @@ static int snd_mixer_oss_recmask(struct snd_mixer_oss_file *fmixer) result |= 1 << chn; } } - mutex_unlock(&mixer->reg_mutex); return result; } @@ -188,12 +185,12 @@ static int snd_mixer_oss_get_recsrc(struct snd_mixer_oss_file *fmixer) if (mixer == NULL) return -EIO; - mutex_lock(&mixer->reg_mutex); + guard(mutex)(&mixer->reg_mutex); if (mixer->put_recsrc && mixer->get_recsrc) { /* exclusive */ unsigned int index; result = mixer->get_recsrc(fmixer, &index); if (result < 0) - goto unlock; + return result; result = 1 << index; } else { struct snd_mixer_oss_slot *pslot; @@ -209,8 +206,6 @@ static int snd_mixer_oss_get_recsrc(struct snd_mixer_oss_file *fmixer) } } mixer->oss_recsrc = result; - unlock: - mutex_unlock(&mixer->reg_mutex); return result; } @@ -224,7 +219,7 @@ static int snd_mixer_oss_set_recsrc(struct snd_mixer_oss_file *fmixer, int recsr if (mixer == NULL) return -EIO; - mutex_lock(&mixer->reg_mutex); + guard(mutex)(&mixer->reg_mutex); if (mixer->get_recsrc && mixer->put_recsrc) { /* exclusive input */ if (recsrc & ~mixer->oss_recsrc) recsrc &= ~mixer->oss_recsrc; @@ -250,7 +245,6 @@ static int snd_mixer_oss_set_recsrc(struct snd_mixer_oss_file *fmixer, int recsr } } } - mutex_unlock(&mixer->reg_mutex); return result; } @@ -262,7 +256,7 @@ static int snd_mixer_oss_get_volume(struct snd_mixer_oss_file *fmixer, int slot) if (mixer == NULL || slot > 30) return -EIO; - mutex_lock(&mixer->reg_mutex); + guard(mutex)(&mixer->reg_mutex); pslot = &mixer->slots[slot]; left = pslot->volume[0]; right = pslot->volume[1]; @@ -270,21 +264,15 @@ static int snd_mixer_oss_get_volume(struct snd_mixer_oss_file *fmixer, int slot) result = pslot->get_volume(fmixer, pslot, &left, &right); if (!pslot->stereo) right = left; - if (snd_BUG_ON(left < 0 || left > 100)) { - result = -EIO; - goto unlock; - } - if (snd_BUG_ON(right < 0 || right > 100)) { - result = -EIO; - goto unlock; - } + if (snd_BUG_ON(left < 0 || left > 100)) + return -EIO; + if (snd_BUG_ON(right < 0 || right > 100)) + return -EIO; if (result >= 0) { pslot->volume[0] = left; pslot->volume[1] = right; result = (left & 0xff) | ((right & 0xff) << 8); } - unlock: - mutex_unlock(&mixer->reg_mutex); return result; } @@ -297,7 +285,7 @@ static int snd_mixer_oss_set_volume(struct snd_mixer_oss_file *fmixer, if (mixer == NULL || slot > 30) return -EIO; - mutex_lock(&mixer->reg_mutex); + guard(mutex)(&mixer->reg_mutex); pslot = &mixer->slots[slot]; if (left > 100) left = 100; @@ -308,12 +296,10 @@ static int snd_mixer_oss_set_volume(struct snd_mixer_oss_file *fmixer, if (pslot->put_volume) result = pslot->put_volume(fmixer, pslot, left, right); if (result < 0) - goto unlock; + return result; pslot->volume[0] = left; pslot->volume[1] = right; result = (left & 0xff) | ((right & 0xff) << 8); - unlock: - mutex_unlock(&mixer->reg_mutex); return result; } @@ -532,37 +518,31 @@ static void snd_mixer_oss_get_volume1_vol(struct snd_mixer_oss_file *fmixer, unsigned int numid, int *left, int *right) { - struct snd_ctl_elem_info *uinfo; - struct snd_ctl_elem_value *uctl; + struct snd_ctl_elem_info *uinfo __free(kfree) = NULL; + struct snd_ctl_elem_value *uctl __free(kfree) = NULL; struct snd_kcontrol *kctl; struct snd_card *card = fmixer->card; if (numid == ID_UNKNOWN) return; - down_read(&card->controls_rwsem); + guard(rwsem_read)(&card->controls_rwsem); kctl = snd_ctl_find_numid_locked(card, numid); - if (!kctl) { - up_read(&card->controls_rwsem); + if (!kctl) return; - } uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL); uctl = kzalloc(sizeof(*uctl), GFP_KERNEL); if (uinfo == NULL || uctl == NULL) - goto __unalloc; + return; if (kctl->info(kctl, uinfo)) - goto __unalloc; + return; if (kctl->get(kctl, uctl)) - goto __unalloc; + return; if (uinfo->type == SNDRV_CTL_ELEM_TYPE_BOOLEAN && uinfo->value.integer.min == 0 && uinfo->value.integer.max == 1) - goto __unalloc; + return; *left = snd_mixer_oss_conv1(uctl->value.integer.value[0], uinfo->value.integer.min, uinfo->value.integer.max, &pslot->volume[0]); if (uinfo->count > 1) *right = snd_mixer_oss_conv1(uctl->value.integer.value[1], uinfo->value.integer.min, uinfo->value.integer.max, &pslot->volume[1]); - __unalloc: - up_read(&card->controls_rwsem); - kfree(uctl); - kfree(uinfo); } static void snd_mixer_oss_get_volume1_sw(struct snd_mixer_oss_file *fmixer, @@ -571,27 +551,25 @@ static void snd_mixer_oss_get_volume1_sw(struct snd_mixer_oss_file *fmixer, int *left, int *right, int route) { - struct snd_ctl_elem_info *uinfo; - struct snd_ctl_elem_value *uctl; + struct snd_ctl_elem_info *uinfo __free(kfree) = NULL; + struct snd_ctl_elem_value *uctl __free(kfree) = NULL; struct snd_kcontrol *kctl; struct snd_card *card = fmixer->card; if (numid == ID_UNKNOWN) return; - down_read(&card->controls_rwsem); + guard(rwsem_read)(&card->controls_rwsem); kctl = snd_ctl_find_numid_locked(card, numid); - if (!kctl) { - up_read(&card->controls_rwsem); + if (!kctl) return; - } uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL); uctl = kzalloc(sizeof(*uctl), GFP_KERNEL); if (uinfo == NULL || uctl == NULL) - goto __unalloc; + return; if (kctl->info(kctl, uinfo)) - goto __unalloc; + return; if (kctl->get(kctl, uctl)) - goto __unalloc; + return; if (!uctl->value.integer.value[0]) { *left = 0; if (uinfo->count == 1) @@ -599,10 +577,6 @@ static void snd_mixer_oss_get_volume1_sw(struct snd_mixer_oss_file *fmixer, } if (uinfo->count > 1 && !uctl->value.integer.value[route ? 3 : 1]) *right = 0; - __unalloc: - up_read(&card->controls_rwsem); - kfree(uctl); - kfree(uinfo); } static int snd_mixer_oss_get_volume1(struct snd_mixer_oss_file *fmixer, @@ -636,41 +610,35 @@ static void snd_mixer_oss_put_volume1_vol(struct snd_mixer_oss_file *fmixer, unsigned int numid, int left, int right) { - struct snd_ctl_elem_info *uinfo; - struct snd_ctl_elem_value *uctl; + struct snd_ctl_elem_info *uinfo __free(kfree) = NULL; + struct snd_ctl_elem_value *uctl __free(kfree) = NULL; struct snd_kcontrol *kctl; struct snd_card *card = fmixer->card; int res; if (numid == ID_UNKNOWN) return; - down_read(&card->controls_rwsem); + guard(rwsem_read)(&card->controls_rwsem); kctl = snd_ctl_find_numid_locked(card, numid); - if (!kctl) { - up_read(&card->controls_rwsem); + if (!kctl) return; - } uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL); uctl = kzalloc(sizeof(*uctl), GFP_KERNEL); if (uinfo == NULL || uctl == NULL) - goto __unalloc; + return; if (kctl->info(kctl, uinfo)) - goto __unalloc; + return; if (uinfo->type == SNDRV_CTL_ELEM_TYPE_BOOLEAN && uinfo->value.integer.min == 0 && uinfo->value.integer.max == 1) - goto __unalloc; + return; uctl->value.integer.value[0] = snd_mixer_oss_conv2(left, uinfo->value.integer.min, uinfo->value.integer.max); if (uinfo->count > 1) uctl->value.integer.value[1] = snd_mixer_oss_conv2(right, uinfo->value.integer.min, uinfo->value.integer.max); res = kctl->put(kctl, uctl); if (res < 0) - goto __unalloc; + return; if (res > 0) snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id); - __unalloc: - up_read(&card->controls_rwsem); - kfree(uctl); - kfree(uinfo); } static void snd_mixer_oss_put_volume1_sw(struct snd_mixer_oss_file *fmixer, @@ -679,26 +647,24 @@ static void snd_mixer_oss_put_volume1_sw(struct snd_mixer_oss_file *fmixer, int left, int right, int route) { - struct snd_ctl_elem_info *uinfo; - struct snd_ctl_elem_value *uctl; + struct snd_ctl_elem_info *uinfo __free(kfree) = NULL; + struct snd_ctl_elem_value *uctl __free(kfree) = NULL; struct snd_kcontrol *kctl; struct snd_card *card = fmixer->card; int res; if (numid == ID_UNKNOWN) return; - down_read(&card->controls_rwsem); + guard(rwsem_read)(&card->controls_rwsem); kctl = snd_ctl_find_numid_locked(card, numid); - if (!kctl) { - up_read(&card->controls_rwsem); + if (!kctl) return; - } uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL); uctl = kzalloc(sizeof(*uctl), GFP_KERNEL); if (uinfo == NULL || uctl == NULL) - goto __unalloc; + return; if (kctl->info(kctl, uinfo)) - goto __unalloc; + return; if (uinfo->count > 1) { uctl->value.integer.value[0] = left > 0 ? 1 : 0; uctl->value.integer.value[route ? 3 : 1] = right > 0 ? 1 : 0; @@ -711,13 +677,9 @@ static void snd_mixer_oss_put_volume1_sw(struct snd_mixer_oss_file *fmixer, } res = kctl->put(kctl, uctl); if (res < 0) - goto __unalloc; + return; if (res > 0) snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id); - __unalloc: - up_read(&card->controls_rwsem); - kfree(uctl); - kfree(uinfo); } static int snd_mixer_oss_put_volume1(struct snd_mixer_oss_file *fmixer, @@ -822,28 +784,24 @@ static int snd_mixer_oss_get_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned struct snd_kcontrol *kctl; struct snd_mixer_oss_slot *pslot; struct slot *slot; - struct snd_ctl_elem_info *uinfo; - struct snd_ctl_elem_value *uctl; + struct snd_ctl_elem_info *uinfo __free(kfree) = NULL; + struct snd_ctl_elem_value *uctl __free(kfree) = NULL; int err, idx; uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL); uctl = kzalloc(sizeof(*uctl), GFP_KERNEL); - if (uinfo == NULL || uctl == NULL) { - err = -ENOMEM; - goto __free_only; - } - down_read(&card->controls_rwsem); + if (uinfo == NULL || uctl == NULL) + return -ENOMEM; + guard(rwsem_read)(&card->controls_rwsem); kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0); - if (! kctl) { - err = -ENOENT; - goto __unlock; - } + if (!kctl) + return -ENOENT; err = kctl->info(kctl, uinfo); if (err < 0) - goto __unlock; + return err; err = kctl->get(kctl, uctl); if (err < 0) - goto __unlock; + return err; for (idx = 0; idx < 32; idx++) { if (!(mixer->mask_recsrc & (1 << idx))) continue; @@ -858,13 +816,7 @@ static int snd_mixer_oss_get_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned break; } } - err = 0; - __unlock: - up_read(&card->controls_rwsem); - __free_only: - kfree(uctl); - kfree(uinfo); - return err; + return 0; } static int snd_mixer_oss_put_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned int active_index) @@ -874,26 +826,22 @@ static int snd_mixer_oss_put_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned struct snd_kcontrol *kctl; struct snd_mixer_oss_slot *pslot; struct slot *slot = NULL; - struct snd_ctl_elem_info *uinfo; - struct snd_ctl_elem_value *uctl; + struct snd_ctl_elem_info *uinfo __free(kfree) = NULL; + struct snd_ctl_elem_value *uctl __free(kfree) = NULL; int err; unsigned int idx; uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL); uctl = kzalloc(sizeof(*uctl), GFP_KERNEL); - if (uinfo == NULL || uctl == NULL) { - err = -ENOMEM; - goto __free_only; - } - down_read(&card->controls_rwsem); + if (uinfo == NULL || uctl == NULL) + return -ENOMEM; + guard(rwsem_read)(&card->controls_rwsem); kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0); - if (! kctl) { - err = -ENOENT; - goto __unlock; - } + if (!kctl) + return -ENOENT; err = kctl->info(kctl, uinfo); if (err < 0) - goto __unlock; + return err; for (idx = 0; idx < 32; idx++) { if (!(mixer->mask_recsrc & (1 << idx))) continue; @@ -907,20 +855,14 @@ static int snd_mixer_oss_put_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned break; slot = NULL; } - if (! slot) - goto __unlock; + if (!slot) + return 0; for (idx = 0; idx < uinfo->count; idx++) uctl->value.enumerated.item[idx] = slot->capture_item; err = kctl->put(kctl, uctl); if (err > 0) snd_ctl_notify(fmixer->card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id); - err = 0; - __unlock: - up_read(&card->controls_rwsem); - __free_only: - kfree(uctl); - kfree(uinfo); - return err; + return 0; } struct snd_mixer_oss_assign_table { @@ -931,34 +873,26 @@ struct snd_mixer_oss_assign_table { static int snd_mixer_oss_build_test(struct snd_mixer_oss *mixer, struct slot *slot, const char *name, int index, int item) { - struct snd_ctl_elem_info *info; + struct snd_ctl_elem_info *info __free(kfree) = NULL; struct snd_kcontrol *kcontrol; struct snd_card *card = mixer->card; int err; - down_read(&card->controls_rwsem); - kcontrol = snd_mixer_oss_test_id(mixer, name, index); - if (kcontrol == NULL) { - up_read(&card->controls_rwsem); - return 0; - } - info = kmalloc(sizeof(*info), GFP_KERNEL); - if (! info) { - up_read(&card->controls_rwsem); - return -ENOMEM; - } - err = kcontrol->info(kcontrol, info); - if (err < 0) { - up_read(&card->controls_rwsem); - kfree(info); - return err; + scoped_guard(rwsem_read, &card->controls_rwsem) { + kcontrol = snd_mixer_oss_test_id(mixer, name, index); + if (kcontrol == NULL) + return 0; + info = kmalloc(sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + err = kcontrol->info(kcontrol, info); + if (err < 0) + return err; + slot->numid[item] = kcontrol->id.numid; } - slot->numid[item] = kcontrol->id.numid; - up_read(&card->controls_rwsem); if (info->count > slot->channels) slot->channels = info->count; slot->present |= 1 << item; - kfree(info); return 0; } @@ -1068,24 +1002,19 @@ static int snd_mixer_oss_build_input(struct snd_mixer_oss *mixer, memset(slot.numid, 0xff, sizeof(slot.numid)); /* ID_UNKNOWN */ if (snd_mixer_oss_build_test_all(mixer, ptr, &slot)) return 0; - down_read(&mixer->card->controls_rwsem); + guard(rwsem_read)(&mixer->card->controls_rwsem); kctl = NULL; if (!ptr->index) kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0); if (kctl) { - struct snd_ctl_elem_info *uinfo; + struct snd_ctl_elem_info *uinfo __free(kfree) = NULL; uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL); - if (! uinfo) { - up_read(&mixer->card->controls_rwsem); + if (!uinfo) return -ENOMEM; - } - if (kctl->info(kctl, uinfo)) { - up_read(&mixer->card->controls_rwsem); - kfree(uinfo); + if (kctl->info(kctl, uinfo)) return 0; - } strcpy(str, ptr->name); if (!strcmp(str, "Master")) strcpy(str, "Mix"); @@ -1097,20 +1026,15 @@ static int snd_mixer_oss_build_input(struct snd_mixer_oss *mixer, } else { for (slot.capture_item = 1; slot.capture_item < uinfo->value.enumerated.items; slot.capture_item++) { uinfo->value.enumerated.item = slot.capture_item; - if (kctl->info(kctl, uinfo)) { - up_read(&mixer->card->controls_rwsem); - kfree(uinfo); + if (kctl->info(kctl, uinfo)) return 0; - } if (!strcmp(uinfo->value.enumerated.name, str)) { slot.present |= SNDRV_MIXER_OSS_PRESENT_CAPTURE; break; } } } - kfree(uinfo); } - up_read(&mixer->card->controls_rwsem); if (slot.present != 0) { pslot = kmalloc(sizeof(slot), GFP_KERNEL); if (! pslot) @@ -1183,7 +1107,7 @@ static void snd_mixer_oss_proc_read(struct snd_info_entry *entry, struct snd_mixer_oss *mixer = entry->private_data; int i; - mutex_lock(&mixer->reg_mutex); + guard(mutex)(&mixer->reg_mutex); for (i = 0; i < SNDRV_OSS_MAX_MIXERS; i++) { struct slot *p; @@ -1198,7 +1122,6 @@ static void snd_mixer_oss_proc_read(struct snd_info_entry *entry, else snd_iprintf(buffer, "\"\" 0\n"); } - mutex_unlock(&mixer->reg_mutex); } static void snd_mixer_oss_proc_write(struct snd_info_entry *entry, @@ -1225,9 +1148,8 @@ static void snd_mixer_oss_proc_write(struct snd_info_entry *entry, cptr = snd_info_get_str(str, cptr, sizeof(str)); if (! *str) { /* remove the entry */ - mutex_lock(&mixer->reg_mutex); - mixer_slot_clear(&mixer->slots[ch]); - mutex_unlock(&mixer->reg_mutex); + scoped_guard(mutex, &mixer->reg_mutex) + mixer_slot_clear(&mixer->slots[ch]); continue; } snd_info_get_str(idxstr, cptr, sizeof(idxstr)); @@ -1236,28 +1158,27 @@ static void snd_mixer_oss_proc_write(struct snd_info_entry *entry, pr_err("ALSA: mixer_oss: invalid index %d\n", idx); continue; } - mutex_lock(&mixer->reg_mutex); - slot = (struct slot *)mixer->slots[ch].private_data; - if (slot && slot->assigned && - slot->assigned->index == idx && ! strcmp(slot->assigned->name, str)) - /* not changed */ - goto __unlock; - tbl = kmalloc(sizeof(*tbl), GFP_KERNEL); - if (!tbl) - goto __unlock; - tbl->oss_id = ch; - tbl->name = kstrdup(str, GFP_KERNEL); - if (! tbl->name) { - kfree(tbl); - goto __unlock; - } - tbl->index = idx; - if (snd_mixer_oss_build_input(mixer, tbl, 1, 1) <= 0) { - kfree(tbl->name); - kfree(tbl); + scoped_guard(mutex, &mixer->reg_mutex) { + slot = (struct slot *)mixer->slots[ch].private_data; + if (slot && slot->assigned && + slot->assigned->index == idx && !strcmp(slot->assigned->name, str)) + /* not changed */ + break; + tbl = kmalloc(sizeof(*tbl), GFP_KERNEL); + if (!tbl) + break; + tbl->oss_id = ch; + tbl->name = kstrdup(str, GFP_KERNEL); + if (!tbl->name) { + kfree(tbl); + break; + } + tbl->index = idx; + if (snd_mixer_oss_build_input(mixer, tbl, 1, 1) <= 0) { + kfree(tbl->name); + kfree(tbl); + } } - __unlock: - mutex_unlock(&mixer->reg_mutex); } } diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c index 728c211142..7386982cf4 100644 --- a/sound/core/oss/pcm_oss.c +++ b/sound/core/oss/pcm_oss.c @@ -377,7 +377,7 @@ static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm, snd_pcm_hw_param_t var, unsigned int best, int *dir) { - struct snd_pcm_hw_params *save = NULL; + struct snd_pcm_hw_params *save __free(kfree) = NULL; int v; unsigned int saved_min; int last = 0; @@ -404,38 +404,30 @@ static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm, saved_min = min; min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir); if (min >= 0) { - struct snd_pcm_hw_params *params1; + struct snd_pcm_hw_params *params1 __free(kfree) = NULL; if (max < 0) goto _end; if ((unsigned int)min == saved_min && mindir == valdir) goto _end; params1 = kmalloc(sizeof(*params1), GFP_KERNEL); - if (params1 == NULL) { - kfree(save); + if (params1 == NULL) return -ENOMEM; - } *params1 = *save; max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir); - if (max < 0) { - kfree(params1); + if (max < 0) goto _end; - } if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) { *params = *params1; last = 1; } - kfree(params1); } else { *params = *save; max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir); - if (max < 0) { - kfree(save); + if (max < 0) return max; - } last = 1; } _end: - kfree(save); if (last) v = snd_pcm_hw_param_last(pcm, params, var, dir); else @@ -789,7 +781,7 @@ static int choose_rate(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, unsigned int best_rate) { const struct snd_interval *it; - struct snd_pcm_hw_params *save; + struct snd_pcm_hw_params *save __free(kfree) = NULL; unsigned int rate, prev; save = kmalloc(sizeof(*save), GFP_KERNEL); @@ -808,10 +800,8 @@ static int choose_rate(struct snd_pcm_substream *substream, ret = snd_pcm_hw_param_set(substream, params, SNDRV_PCM_HW_PARAM_RATE, rate, 0); - if (ret == (int)rate) { - kfree(save); + if (ret == (int)rate) return rate; - } *params = *save; } prev = rate; @@ -821,7 +811,6 @@ static int choose_rate(struct snd_pcm_substream *substream, } /* not found, use the nearest rate */ - kfree(save); return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL); } @@ -1634,9 +1623,8 @@ static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size) break; result = 0; set_current_state(TASK_INTERRUPTIBLE); - snd_pcm_stream_lock_irq(substream); - state = runtime->state; - snd_pcm_stream_unlock_irq(substream); + scoped_guard(pcm_stream_lock_irq, substream) + state = runtime->state; if (state != SNDRV_PCM_STATE_RUNNING) { set_current_state(TASK_RUNNING); break; @@ -1847,7 +1835,7 @@ static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) struct snd_pcm_substream *substream; int err; int direct; - struct snd_pcm_hw_params *params; + struct snd_pcm_hw_params *params __free(kfree) = NULL; unsigned int formats = 0; const struct snd_mask *format_mask; int fmt; @@ -1873,7 +1861,7 @@ static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) _snd_pcm_hw_params_any(params); err = snd_pcm_hw_refine(substream, params); if (err < 0) - goto error; + return err; format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT); for (fmt = 0; fmt < 32; ++fmt) { if (snd_mask_test(format_mask, fmt)) { @@ -1883,9 +1871,7 @@ static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) } } - error: - kfree(params); - return err < 0 ? err : formats; + return formats; } static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format) @@ -2347,7 +2333,7 @@ static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, { struct snd_pcm_oss_setup *setup; - mutex_lock(&pcm->streams[stream].oss.setup_mutex); + guard(mutex)(&pcm->streams[stream].oss.setup_mutex); do { for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) { @@ -2358,7 +2344,6 @@ static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, out: if (setup) *rsetup = *setup; - mutex_unlock(&pcm->streams[stream].oss.setup_mutex); } static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) @@ -2853,23 +2838,23 @@ static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait) if (psubstream != NULL) { struct snd_pcm_runtime *runtime = psubstream->runtime; poll_wait(file, &runtime->sleep, wait); - snd_pcm_stream_lock_irq(psubstream); - if (runtime->state != SNDRV_PCM_STATE_DRAINING && - (runtime->state != SNDRV_PCM_STATE_RUNNING || - snd_pcm_oss_playback_ready(psubstream))) - mask |= EPOLLOUT | EPOLLWRNORM; - snd_pcm_stream_unlock_irq(psubstream); + scoped_guard(pcm_stream_lock_irq, psubstream) { + if (runtime->state != SNDRV_PCM_STATE_DRAINING && + (runtime->state != SNDRV_PCM_STATE_RUNNING || + snd_pcm_oss_playback_ready(psubstream))) + mask |= EPOLLOUT | EPOLLWRNORM; + } } if (csubstream != NULL) { struct snd_pcm_runtime *runtime = csubstream->runtime; snd_pcm_state_t ostate; poll_wait(file, &runtime->sleep, wait); - snd_pcm_stream_lock_irq(csubstream); - ostate = runtime->state; - if (ostate != SNDRV_PCM_STATE_RUNNING || - snd_pcm_oss_capture_ready(csubstream)) - mask |= EPOLLIN | EPOLLRDNORM; - snd_pcm_stream_unlock_irq(csubstream); + scoped_guard(pcm_stream_lock_irq, csubstream) { + ostate = runtime->state; + if (ostate != SNDRV_PCM_STATE_RUNNING || + snd_pcm_oss_capture_ready(csubstream)) + mask |= EPOLLIN | EPOLLRDNORM; + } if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { struct snd_pcm_oss_file ofile; memset(&ofile, 0, sizeof(ofile)); @@ -2964,7 +2949,7 @@ static void snd_pcm_oss_proc_read(struct snd_info_entry *entry, { struct snd_pcm_str *pstr = entry->private_data; struct snd_pcm_oss_setup *setup = pstr->oss.setup_list; - mutex_lock(&pstr->oss.setup_mutex); + guard(mutex)(&pstr->oss.setup_mutex); while (setup) { snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n", setup->task_name, @@ -2978,7 +2963,6 @@ static void snd_pcm_oss_proc_read(struct snd_info_entry *entry, setup->nosilence ? " no-silence" : ""); setup = setup->next; } - mutex_unlock(&pstr->oss.setup_mutex); } static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr) @@ -3004,12 +2988,11 @@ static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, struct snd_pcm_oss_setup *setup, *setup1, template; while (!snd_info_get_line(buffer, line, sizeof(line))) { - mutex_lock(&pstr->oss.setup_mutex); + guard(mutex)(&pstr->oss.setup_mutex); memset(&template, 0, sizeof(template)); ptr = snd_info_get_str(task_name, line, sizeof(task_name)); if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) { snd_pcm_oss_proc_free_setup_list(pstr); - mutex_unlock(&pstr->oss.setup_mutex); continue; } for (setup = pstr->oss.setup_list; setup; setup = setup->next) { @@ -3049,7 +3032,6 @@ static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, setup = kmalloc(sizeof(*setup), GFP_KERNEL); if (! setup) { buffer->error = -ENOMEM; - mutex_unlock(&pstr->oss.setup_mutex); return; } if (pstr->oss.setup_list == NULL) @@ -3063,12 +3045,10 @@ static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, if (! template.task_name) { kfree(setup); buffer->error = -ENOMEM; - mutex_unlock(&pstr->oss.setup_mutex); return; } } *setup = template; - mutex_unlock(&pstr->oss.setup_mutex); } } diff --git a/sound/core/pcm.c b/sound/core/pcm.c index d0788126cb..dc37f3508d 100644 --- a/sound/core/pcm.c +++ b/sound/core/pcm.c @@ -91,9 +91,8 @@ static int snd_pcm_control_ioctl(struct snd_card *card, if (get_user(device, (int __user *)arg)) return -EFAULT; - mutex_lock(®ister_mutex); - device = snd_pcm_next(card, device); - mutex_unlock(®ister_mutex); + scoped_guard(mutex, ®ister_mutex) + device = snd_pcm_next(card, device); if (put_user(device, (int __user *)arg)) return -EFAULT; return 0; @@ -106,7 +105,6 @@ static int snd_pcm_control_ioctl(struct snd_card *card, struct snd_pcm *pcm; struct snd_pcm_str *pstr; struct snd_pcm_substream *substream; - int err; info = (struct snd_pcm_info __user *)arg; if (get_user(device, &info->device)) @@ -118,35 +116,23 @@ static int snd_pcm_control_ioctl(struct snd_card *card, stream = array_index_nospec(stream, 2); if (get_user(subdevice, &info->subdevice)) return -EFAULT; - mutex_lock(®ister_mutex); + guard(mutex)(®ister_mutex); pcm = snd_pcm_get(card, device); - if (pcm == NULL) { - err = -ENXIO; - goto _error; - } + if (pcm == NULL) + return -ENXIO; pstr = &pcm->streams[stream]; - if (pstr->substream_count == 0) { - err = -ENOENT; - goto _error; - } - if (subdevice >= pstr->substream_count) { - err = -ENXIO; - goto _error; - } + if (pstr->substream_count == 0) + return -ENOENT; + if (subdevice >= pstr->substream_count) + return -ENXIO; for (substream = pstr->substream; substream; substream = substream->next) if (substream->number == (int)subdevice) break; - if (substream == NULL) { - err = -ENXIO; - goto _error; - } - mutex_lock(&pcm->open_mutex); - err = snd_pcm_info_user(substream, info); - mutex_unlock(&pcm->open_mutex); - _error: - mutex_unlock(®ister_mutex); - return err; + if (substream == NULL) + return -ENXIO; + guard(mutex)(&pcm->open_mutex); + return snd_pcm_info_user(substream, info); } case SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE: { @@ -225,9 +211,11 @@ static const char * const snd_pcm_format_names[] = { */ const char *snd_pcm_format_name(snd_pcm_format_t format) { - if ((__force unsigned int)format >= ARRAY_SIZE(snd_pcm_format_names)) + unsigned int format_num = (__force unsigned int)format; + + if (format_num >= ARRAY_SIZE(snd_pcm_format_names) || !snd_pcm_format_names[format_num]) return "Unknown"; - return snd_pcm_format_names[(__force unsigned int)format]; + return snd_pcm_format_names[format_num]; } EXPORT_SYMBOL_GPL(snd_pcm_format_name); @@ -340,7 +328,7 @@ static const char *snd_pcm_oss_format_name(int format) static void snd_pcm_proc_info_read(struct snd_pcm_substream *substream, struct snd_info_buffer *buffer) { - struct snd_pcm_info *info; + struct snd_pcm_info *info __free(kfree) = NULL; int err; if (! substream) @@ -353,7 +341,6 @@ static void snd_pcm_proc_info_read(struct snd_pcm_substream *substream, err = snd_pcm_info(substream, info); if (err < 0) { snd_iprintf(buffer, "error %d\n", err); - kfree(info); return; } snd_iprintf(buffer, "card: %d\n", info->card); @@ -367,7 +354,6 @@ static void snd_pcm_proc_info_read(struct snd_pcm_substream *substream, snd_iprintf(buffer, "subclass: %d\n", info->dev_subclass); snd_iprintf(buffer, "subdevices_count: %d\n", info->subdevices_count); snd_iprintf(buffer, "subdevices_avail: %d\n", info->subdevices_avail); - kfree(info); } static void snd_pcm_stream_proc_info_read(struct snd_info_entry *entry, @@ -389,15 +375,15 @@ static void snd_pcm_substream_proc_hw_params_read(struct snd_info_entry *entry, struct snd_pcm_substream *substream = entry->private_data; struct snd_pcm_runtime *runtime; - mutex_lock(&substream->pcm->open_mutex); + guard(mutex)(&substream->pcm->open_mutex); runtime = substream->runtime; if (!runtime) { snd_iprintf(buffer, "closed\n"); - goto unlock; + return; } if (runtime->state == SNDRV_PCM_STATE_OPEN) { snd_iprintf(buffer, "no setup\n"); - goto unlock; + return; } snd_iprintf(buffer, "access: %s\n", snd_pcm_access_name(runtime->access)); snd_iprintf(buffer, "format: %s\n", snd_pcm_format_name(runtime->format)); @@ -416,8 +402,6 @@ static void snd_pcm_substream_proc_hw_params_read(struct snd_info_entry *entry, snd_iprintf(buffer, "OSS period frames: %lu\n", (unsigned long)runtime->oss.period_frames); } #endif - unlock: - mutex_unlock(&substream->pcm->open_mutex); } static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry *entry, @@ -426,15 +410,15 @@ static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry *entry, struct snd_pcm_substream *substream = entry->private_data; struct snd_pcm_runtime *runtime; - mutex_lock(&substream->pcm->open_mutex); + guard(mutex)(&substream->pcm->open_mutex); runtime = substream->runtime; if (!runtime) { snd_iprintf(buffer, "closed\n"); - goto unlock; + return; } if (runtime->state == SNDRV_PCM_STATE_OPEN) { snd_iprintf(buffer, "no setup\n"); - goto unlock; + return; } snd_iprintf(buffer, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime->tstamp_mode)); snd_iprintf(buffer, "period_step: %u\n", runtime->period_step); @@ -444,8 +428,6 @@ static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry *entry, snd_iprintf(buffer, "silence_threshold: %lu\n", runtime->silence_threshold); snd_iprintf(buffer, "silence_size: %lu\n", runtime->silence_size); snd_iprintf(buffer, "boundary: %lu\n", runtime->boundary); - unlock: - mutex_unlock(&substream->pcm->open_mutex); } static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry, @@ -456,17 +438,17 @@ static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry, struct snd_pcm_status64 status; int err; - mutex_lock(&substream->pcm->open_mutex); + guard(mutex)(&substream->pcm->open_mutex); runtime = substream->runtime; if (!runtime) { snd_iprintf(buffer, "closed\n"); - goto unlock; + return; } memset(&status, 0, sizeof(status)); err = snd_pcm_status64(substream, &status); if (err < 0) { snd_iprintf(buffer, "error %d\n", err); - goto unlock; + return; } snd_iprintf(buffer, "state: %s\n", snd_pcm_state_name(status.state)); snd_iprintf(buffer, "owner_pid : %d\n", pid_vnr(substream->pid)); @@ -480,8 +462,6 @@ static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry, snd_iprintf(buffer, "-----\n"); snd_iprintf(buffer, "hw_ptr : %ld\n", runtime->status->hw_ptr); snd_iprintf(buffer, "appl_ptr : %ld\n", runtime->control->appl_ptr); - unlock: - mutex_unlock(&substream->pcm->open_mutex); } #ifdef CONFIG_SND_PCM_XRUN_DEBUG @@ -1009,9 +989,8 @@ void snd_pcm_detach_substream(struct snd_pcm_substream *substream) kfree(runtime->hw_constraints.rules); /* Avoid concurrent access to runtime via PCM timer interface */ if (substream->timer) { - spin_lock_irq(&substream->timer->lock); - substream->runtime = NULL; - spin_unlock_irq(&substream->timer->lock); + scoped_guard(spinlock_irq, &substream->timer->lock) + substream->runtime = NULL; } else { substream->runtime = NULL; } @@ -1068,10 +1047,10 @@ static int snd_pcm_dev_register(struct snd_device *device) return -ENXIO; pcm = device->device_data; - mutex_lock(®ister_mutex); + guard(mutex)(®ister_mutex); err = snd_pcm_add(pcm); if (err) - goto unlock; + return err; for (cidx = 0; cidx < 2; cidx++) { int devtype = -1; if (pcm->streams[cidx].substream == NULL) @@ -1090,7 +1069,7 @@ static int snd_pcm_dev_register(struct snd_device *device) pcm->streams[cidx].dev); if (err < 0) { list_del_init(&pcm->list); - goto unlock; + return err; } for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) @@ -1098,9 +1077,6 @@ static int snd_pcm_dev_register(struct snd_device *device) } pcm_call_notify(pcm, n_register); - - unlock: - mutex_unlock(®ister_mutex); return err; } @@ -1110,8 +1086,8 @@ static int snd_pcm_dev_disconnect(struct snd_device *device) struct snd_pcm_substream *substream; int cidx; - mutex_lock(®ister_mutex); - mutex_lock(&pcm->open_mutex); + guard(mutex)(®ister_mutex); + guard(mutex)(&pcm->open_mutex); wake_up(&pcm->open_wait); list_del_init(&pcm->list); @@ -1138,8 +1114,6 @@ static int snd_pcm_dev_disconnect(struct snd_device *device) snd_unregister_device(pcm->streams[cidx].dev); free_chmap(&pcm->streams[cidx]); } - mutex_unlock(&pcm->open_mutex); - mutex_unlock(®ister_mutex); return 0; } @@ -1164,7 +1138,7 @@ int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree) !notify->n_unregister || !notify->n_disconnect)) return -EINVAL; - mutex_lock(®ister_mutex); + guard(mutex)(®ister_mutex); if (nfree) { list_del(¬ify->list); list_for_each_entry(pcm, &snd_pcm_devices, list) @@ -1174,7 +1148,6 @@ int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree) list_for_each_entry(pcm, &snd_pcm_devices, list) notify->n_register(pcm); } - mutex_unlock(®ister_mutex); return 0; } EXPORT_SYMBOL(snd_pcm_notify); @@ -1190,7 +1163,7 @@ static void snd_pcm_proc_read(struct snd_info_entry *entry, { struct snd_pcm *pcm; - mutex_lock(®ister_mutex); + guard(mutex)(®ister_mutex); list_for_each_entry(pcm, &snd_pcm_devices, list) { snd_iprintf(buffer, "%02i-%02i: %s : %s", pcm->card->number, pcm->device, pcm->id, pcm->name); @@ -1202,7 +1175,6 @@ static void snd_pcm_proc_read(struct snd_info_entry *entry, pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count); snd_iprintf(buffer, "\n"); } - mutex_unlock(®ister_mutex); } static struct snd_info_entry *snd_pcm_proc_entry; diff --git a/sound/core/pcm_compat.c b/sound/core/pcm_compat.c index c96483091f..a42ec7f5a1 100644 --- a/sound/core/pcm_compat.c +++ b/sound/core/pcm_compat.c @@ -235,7 +235,7 @@ static int snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream *substream, int refine, struct snd_pcm_hw_params32 __user *data32) { - struct snd_pcm_hw_params *data; + struct snd_pcm_hw_params *data __free(kfree) = NULL; struct snd_pcm_runtime *runtime; int err; @@ -248,34 +248,28 @@ static int snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream *substream, return -ENOMEM; /* only fifo_size (RO from userspace) is different, so just copy all */ - if (copy_from_user(data, data32, sizeof(*data32))) { - err = -EFAULT; - goto error; - } + if (copy_from_user(data, data32, sizeof(*data32))) + return -EFAULT; if (refine) { err = snd_pcm_hw_refine(substream, data); if (err < 0) - goto error; + return err; err = fixup_unreferenced_params(substream, data); } else { err = snd_pcm_hw_params(substream, data); } if (err < 0) - goto error; + return err; if (copy_to_user(data32, data, sizeof(*data32)) || - put_user(data->fifo_size, &data32->fifo_size)) { - err = -EFAULT; - goto error; - } + put_user(data->fifo_size, &data32->fifo_size)) + return -EFAULT; if (! refine) { unsigned int new_boundary = recalculate_boundary(runtime); if (new_boundary) runtime->boundary = new_boundary; } - error: - kfree(data); return err; } @@ -338,7 +332,7 @@ static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream, compat_caddr_t buf; compat_caddr_t __user *bufptr; u32 frames; - void __user **bufs; + void __user **bufs __free(kfree) = NULL; int err, ch, i; if (! substream->runtime) @@ -360,10 +354,8 @@ static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream, return -ENOMEM; for (i = 0; i < ch; i++) { u32 ptr; - if (get_user(ptr, bufptr)) { - kfree(bufs); + if (get_user(ptr, bufptr)) return -EFAULT; - } bufs[i] = compat_ptr(ptr); bufptr++; } @@ -373,9 +365,8 @@ static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream, err = snd_pcm_lib_readv(substream, bufs, frames); if (err >= 0) { if (put_user(err, &data32->result)) - err = -EFAULT; + return -EFAULT; } - kfree(bufs); return err; } @@ -441,22 +432,22 @@ static int snd_pcm_ioctl_sync_ptr_x32(struct snd_pcm_substream *substream, boundary = recalculate_boundary(runtime); if (!boundary) boundary = 0x7fffffff; - snd_pcm_stream_lock_irq(substream); - /* FIXME: we should consider the boundary for the sync from app */ - if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL)) - control->appl_ptr = scontrol.appl_ptr; - else - scontrol.appl_ptr = control->appl_ptr % boundary; - if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) - control->avail_min = scontrol.avail_min; - else - scontrol.avail_min = control->avail_min; - sstatus.state = status->state; - sstatus.hw_ptr = status->hw_ptr % boundary; - sstatus.tstamp = status->tstamp; - sstatus.suspended_state = status->suspended_state; - sstatus.audio_tstamp = status->audio_tstamp; - snd_pcm_stream_unlock_irq(substream); + scoped_guard(pcm_stream_lock_irq, substream) { + /* FIXME: we should consider the boundary for the sync from app */ + if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL)) + control->appl_ptr = scontrol.appl_ptr; + else + scontrol.appl_ptr = control->appl_ptr % boundary; + if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) + control->avail_min = scontrol.avail_min; + else + scontrol.avail_min = control->avail_min; + sstatus.state = status->state; + sstatus.hw_ptr = status->hw_ptr % boundary; + sstatus.tstamp = status->tstamp; + sstatus.suspended_state = status->suspended_state; + sstatus.audio_tstamp = status->audio_tstamp; + } if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL)) snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_DEVICE); if (put_user(sstatus.state, &src->s.status.state) || @@ -519,26 +510,24 @@ static int snd_pcm_ioctl_sync_ptr_buggy(struct snd_pcm_substream *substream, if (err < 0) return err; } - snd_pcm_stream_lock_irq(substream); - if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) { - err = pcm_lib_apply_appl_ptr(substream, sync_cp->appl_ptr); - if (err < 0) { - snd_pcm_stream_unlock_irq(substream); - return err; + scoped_guard(pcm_stream_lock_irq, substream) { + if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) { + err = pcm_lib_apply_appl_ptr(substream, sync_cp->appl_ptr); + if (err < 0) + return err; + } else { + sync_cp->appl_ptr = control->appl_ptr; } - } else { - sync_cp->appl_ptr = control->appl_ptr; + if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) + control->avail_min = sync_cp->avail_min; + else + sync_cp->avail_min = control->avail_min; + sync_ptr.s.status.state = status->state; + sync_ptr.s.status.hw_ptr = status->hw_ptr; + sync_ptr.s.status.tstamp = status->tstamp; + sync_ptr.s.status.suspended_state = status->suspended_state; + sync_ptr.s.status.audio_tstamp = status->audio_tstamp; } - if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) - control->avail_min = sync_cp->avail_min; - else - sync_cp->avail_min = control->avail_min; - sync_ptr.s.status.state = status->state; - sync_ptr.s.status.hw_ptr = status->hw_ptr; - sync_ptr.s.status.tstamp = status->tstamp; - sync_ptr.s.status.suspended_state = status->suspended_state; - sync_ptr.s.status.audio_tstamp = status->audio_tstamp; - snd_pcm_stream_unlock_irq(substream); if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_DEVICE); if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c index 41103e5c43..6f73b3c2c2 100644 --- a/sound/core/pcm_lib.c +++ b/sound/core/pcm_lib.c @@ -1744,8 +1744,8 @@ static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, void *arg) { struct snd_pcm_runtime *runtime = substream->runtime; - unsigned long flags; - snd_pcm_stream_lock_irqsave(substream, flags); + + guard(pcm_stream_lock_irqsave)(substream); if (snd_pcm_running(substream) && snd_pcm_update_hw_ptr(substream) >= 0) runtime->status->hw_ptr %= runtime->buffer_size; @@ -1753,7 +1753,6 @@ static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, runtime->status->hw_ptr = 0; runtime->hw_ptr_wrap = 0; } - snd_pcm_stream_unlock_irqrestore(substream, flags); return 0; } @@ -1899,14 +1898,11 @@ EXPORT_SYMBOL(snd_pcm_period_elapsed_under_stream_lock); */ void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) { - unsigned long flags; - if (snd_BUG_ON(!substream)) return; - snd_pcm_stream_lock_irqsave(substream, flags); + guard(pcm_stream_lock_irqsave)(substream); snd_pcm_period_elapsed_under_stream_lock(substream); - snd_pcm_stream_unlock_irqrestore(substream, flags); } EXPORT_SYMBOL(snd_pcm_period_elapsed); diff --git a/sound/core/pcm_memory.c b/sound/core/pcm_memory.c index a0b9514716..506386959f 100644 --- a/sound/core/pcm_memory.c +++ b/sound/core/pcm_memory.c @@ -38,17 +38,15 @@ static void __update_allocated_size(struct snd_card *card, ssize_t bytes) static void update_allocated_size(struct snd_card *card, ssize_t bytes) { - mutex_lock(&card->memory_mutex); + guard(mutex)(&card->memory_mutex); __update_allocated_size(card, bytes); - mutex_unlock(&card->memory_mutex); } static void decrease_allocated_size(struct snd_card *card, size_t bytes) { - mutex_lock(&card->memory_mutex); + guard(mutex)(&card->memory_mutex); WARN_ON(card->total_pcm_alloc_bytes < bytes); __update_allocated_size(card, -(ssize_t)bytes); - mutex_unlock(&card->memory_mutex); } static int do_alloc_pages(struct snd_card *card, int type, struct device *dev, @@ -58,14 +56,12 @@ static int do_alloc_pages(struct snd_card *card, int type, struct device *dev, int err; /* check and reserve the requested size */ - mutex_lock(&card->memory_mutex); - if (max_alloc_per_card && - card->total_pcm_alloc_bytes + size > max_alloc_per_card) { - mutex_unlock(&card->memory_mutex); - return -ENOMEM; + scoped_guard(mutex, &card->memory_mutex) { + if (max_alloc_per_card && + card->total_pcm_alloc_bytes + size > max_alloc_per_card) + return -ENOMEM; + __update_allocated_size(card, size); } - __update_allocated_size(card, size); - mutex_unlock(&card->memory_mutex); if (str == SNDRV_PCM_STREAM_PLAYBACK) dir = DMA_TO_DEVICE; @@ -191,20 +187,20 @@ static void snd_pcm_lib_preallocate_proc_write(struct snd_info_entry *entry, size_t size; struct snd_dma_buffer new_dmab; - mutex_lock(&substream->pcm->open_mutex); + guard(mutex)(&substream->pcm->open_mutex); if (substream->runtime) { buffer->error = -EBUSY; - goto unlock; + return; } if (!snd_info_get_line(buffer, line, sizeof(line))) { snd_info_get_str(str, line, sizeof(str)); size = simple_strtoul(str, NULL, 10) * 1024; if ((size != 0 && size < 8192) || size > substream->dma_max) { buffer->error = -EINVAL; - goto unlock; + return; } if (substream->dma_buffer.bytes == size) - goto unlock; + return; memset(&new_dmab, 0, sizeof(new_dmab)); new_dmab.dev = substream->dma_buffer.dev; if (size > 0) { @@ -218,7 +214,7 @@ static void snd_pcm_lib_preallocate_proc_write(struct snd_info_entry *entry, substream->pcm->card->number, substream->pcm->device, substream->stream ? 'c' : 'p', substream->number, substream->pcm->name, size); - goto unlock; + return; } substream->buffer_bytes_max = size; } else { @@ -230,8 +226,6 @@ static void snd_pcm_lib_preallocate_proc_write(struct snd_info_entry *entry, } else { buffer->error = -EINVAL; } - unlock: - mutex_unlock(&substream->pcm->open_mutex); } static inline void preallocate_info_init(struct snd_pcm_substream *substream) diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index 21baf6bf7e..0b76e76823 100644 --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -236,7 +236,7 @@ int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) int snd_pcm_info_user(struct snd_pcm_substream *substream, struct snd_pcm_info __user * _info) { - struct snd_pcm_info *info; + struct snd_pcm_info *info __free(kfree) = NULL; int err; info = kmalloc(sizeof(*info), GFP_KERNEL); @@ -247,7 +247,6 @@ int snd_pcm_info_user(struct snd_pcm_substream *substream, if (copy_to_user(_info, info, sizeof(*info))) err = -EFAULT; } - kfree(info); return err; } @@ -359,7 +358,7 @@ static int constrain_params_by_rules(struct snd_pcm_substream *substream, struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints; unsigned int k; - unsigned int *rstamps; + unsigned int *rstamps __free(kfree) = NULL; unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; unsigned int stamp; struct snd_pcm_hw_rule *r; @@ -435,10 +434,8 @@ retry: } changed = r->func(params, r); - if (changed < 0) { - err = changed; - goto out; - } + if (changed < 0) + return changed; /* * When the parameter is changed, notify it to the caller @@ -469,8 +466,6 @@ retry: if (again) goto retry; - out: - kfree(rstamps); return err; } @@ -576,26 +571,24 @@ EXPORT_SYMBOL(snd_pcm_hw_refine); static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, struct snd_pcm_hw_params __user * _params) { - struct snd_pcm_hw_params *params; + struct snd_pcm_hw_params *params __free(kfree) = NULL; int err; params = memdup_user(_params, sizeof(*params)); if (IS_ERR(params)) - return PTR_ERR(params); + return PTR_ERR(no_free_ptr(params)); err = snd_pcm_hw_refine(substream, params); if (err < 0) - goto end; + return err; err = fixup_unreferenced_params(substream, params); if (err < 0) - goto end; + return err; if (copy_to_user(_params, params, sizeof(*params))) - err = -EFAULT; -end: - kfree(params); - return err; + return -EFAULT; + return 0; } static int period_to_usecs(struct snd_pcm_runtime *runtime) @@ -616,10 +609,9 @@ static int period_to_usecs(struct snd_pcm_runtime *runtime) static void snd_pcm_set_state(struct snd_pcm_substream *substream, snd_pcm_state_t state) { - snd_pcm_stream_lock_irq(substream); + guard(pcm_stream_lock_irq)(substream); if (substream->runtime->state != SNDRV_PCM_STATE_DISCONNECTED) __snd_pcm_set_state(substream->runtime, state); - snd_pcm_stream_unlock_irq(substream); } static inline void snd_pcm_timer_notify(struct snd_pcm_substream *substream, @@ -745,20 +737,20 @@ static int snd_pcm_hw_params(struct snd_pcm_substream *substream, err = snd_pcm_buffer_access_lock(runtime); if (err < 0) return err; - snd_pcm_stream_lock_irq(substream); - switch (runtime->state) { - case SNDRV_PCM_STATE_OPEN: - case SNDRV_PCM_STATE_SETUP: - case SNDRV_PCM_STATE_PREPARED: - if (!is_oss_stream(substream) && - atomic_read(&substream->mmap_count)) + scoped_guard(pcm_stream_lock_irq, substream) { + switch (runtime->state) { + case SNDRV_PCM_STATE_OPEN: + case SNDRV_PCM_STATE_SETUP: + case SNDRV_PCM_STATE_PREPARED: + if (!is_oss_stream(substream) && + atomic_read(&substream->mmap_count)) + err = -EBADFD; + break; + default: err = -EBADFD; - break; - default: - err = -EBADFD; - break; + break; + } } - snd_pcm_stream_unlock_irq(substream); if (err) goto unlock; @@ -869,21 +861,19 @@ static int snd_pcm_hw_params(struct snd_pcm_substream *substream, static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, struct snd_pcm_hw_params __user * _params) { - struct snd_pcm_hw_params *params; + struct snd_pcm_hw_params *params __free(kfree) = NULL; int err; params = memdup_user(_params, sizeof(*params)); if (IS_ERR(params)) - return PTR_ERR(params); + return PTR_ERR(no_free_ptr(params)); err = snd_pcm_hw_params(substream, params); if (err < 0) - goto end; + return err; if (copy_to_user(_params, params, sizeof(*params))) - err = -EFAULT; -end: - kfree(params); + return -EFAULT; return err; } @@ -910,18 +900,18 @@ static int snd_pcm_hw_free(struct snd_pcm_substream *substream) result = snd_pcm_buffer_access_lock(runtime); if (result < 0) return result; - snd_pcm_stream_lock_irq(substream); - switch (runtime->state) { - case SNDRV_PCM_STATE_SETUP: - case SNDRV_PCM_STATE_PREPARED: - if (atomic_read(&substream->mmap_count)) + scoped_guard(pcm_stream_lock_irq, substream) { + switch (runtime->state) { + case SNDRV_PCM_STATE_SETUP: + case SNDRV_PCM_STATE_PREPARED: + if (atomic_read(&substream->mmap_count)) + result = -EBADFD; + break; + default: result = -EBADFD; - break; - default: - result = -EBADFD; - break; + break; + } } - snd_pcm_stream_unlock_irq(substream); if (result) goto unlock; result = do_hw_free(substream); @@ -941,12 +931,10 @@ static int snd_pcm_sw_params(struct snd_pcm_substream *substream, if (PCM_RUNTIME_CHECK(substream)) return -ENXIO; runtime = substream->runtime; - snd_pcm_stream_lock_irq(substream); - if (runtime->state == SNDRV_PCM_STATE_OPEN) { - snd_pcm_stream_unlock_irq(substream); - return -EBADFD; + scoped_guard(pcm_stream_lock_irq, substream) { + if (runtime->state == SNDRV_PCM_STATE_OPEN) + return -EBADFD; } - snd_pcm_stream_unlock_irq(substream); if (params->tstamp_mode < 0 || params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) @@ -966,24 +954,24 @@ static int snd_pcm_sw_params(struct snd_pcm_substream *substream, return -EINVAL; } err = 0; - snd_pcm_stream_lock_irq(substream); - runtime->tstamp_mode = params->tstamp_mode; - if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12)) - runtime->tstamp_type = params->tstamp_type; - runtime->period_step = params->period_step; - runtime->control->avail_min = params->avail_min; - runtime->start_threshold = params->start_threshold; - runtime->stop_threshold = params->stop_threshold; - runtime->silence_threshold = params->silence_threshold; - runtime->silence_size = params->silence_size; - params->boundary = runtime->boundary; - if (snd_pcm_running(substream)) { - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && - runtime->silence_size > 0) - snd_pcm_playback_silence(substream, ULONG_MAX); - err = snd_pcm_update_state(substream, runtime); + scoped_guard(pcm_stream_lock_irq, substream) { + runtime->tstamp_mode = params->tstamp_mode; + if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12)) + runtime->tstamp_type = params->tstamp_type; + runtime->period_step = params->period_step; + runtime->control->avail_min = params->avail_min; + runtime->start_threshold = params->start_threshold; + runtime->stop_threshold = params->stop_threshold; + runtime->silence_threshold = params->silence_threshold; + runtime->silence_size = params->silence_size; + params->boundary = runtime->boundary; + if (snd_pcm_running(substream)) { + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && + runtime->silence_size > 0) + snd_pcm_playback_silence(substream, ULONG_MAX); + err = snd_pcm_update_state(substream, runtime); + } } - snd_pcm_stream_unlock_irq(substream); return err; } @@ -1017,7 +1005,7 @@ int snd_pcm_status64(struct snd_pcm_substream *substream, { struct snd_pcm_runtime *runtime = substream->runtime; - snd_pcm_stream_lock_irq(substream); + guard(pcm_stream_lock_irq)(substream); snd_pcm_unpack_audio_tstamp_config(status->audio_tstamp_data, &runtime->audio_tstamp_config); @@ -1038,7 +1026,7 @@ int snd_pcm_status64(struct snd_pcm_substream *substream, status->state = runtime->state; status->suspended_state = runtime->suspended_state; if (status->state == SNDRV_PCM_STATE_OPEN) - goto _end; + return 0; status->trigger_tstamp_sec = runtime->trigger_tstamp.tv_sec; status->trigger_tstamp_nsec = runtime->trigger_tstamp.tv_nsec; if (snd_pcm_running(substream)) { @@ -1083,8 +1071,6 @@ int snd_pcm_status64(struct snd_pcm_substream *substream, status->overrange = runtime->overrange; runtime->avail_max = 0; runtime->overrange = 0; - _end: - snd_pcm_stream_unlock_irq(substream); return 0; } @@ -1169,12 +1155,10 @@ static int snd_pcm_channel_info(struct snd_pcm_substream *substream, channel = info->channel; runtime = substream->runtime; - snd_pcm_stream_lock_irq(substream); - if (runtime->state == SNDRV_PCM_STATE_OPEN) { - snd_pcm_stream_unlock_irq(substream); - return -EBADFD; + scoped_guard(pcm_stream_lock_irq, substream) { + if (runtime->state == SNDRV_PCM_STATE_OPEN) + return -EBADFD; } - snd_pcm_stream_unlock_irq(substream); if (channel >= runtime->channels) return -EINVAL; memset(info, 0, sizeof(*info)); @@ -1395,12 +1379,8 @@ static int snd_pcm_action_lock_irq(const struct action_ops *ops, struct snd_pcm_substream *substream, snd_pcm_state_t state) { - int res; - - snd_pcm_stream_lock_irq(substream); - res = snd_pcm_action(ops, substream, state); - snd_pcm_stream_unlock_irq(substream); - return res; + guard(pcm_stream_lock_irq)(substream); + return snd_pcm_action(ops, substream, state); } /* @@ -1412,17 +1392,15 @@ static int snd_pcm_action_nonatomic(const struct action_ops *ops, int res; /* Guarantee the group members won't change during non-atomic action */ - down_read(&snd_pcm_link_rwsem); + guard(rwsem_read)(&snd_pcm_link_rwsem); res = snd_pcm_buffer_access_lock(substream->runtime); if (res < 0) - goto unlock; + return res; if (snd_pcm_stream_linked(substream)) res = snd_pcm_action_group(ops, substream, state, false); else res = snd_pcm_action_single(ops, substream, state); snd_pcm_buffer_access_unlock(substream->runtime); - unlock: - up_read(&snd_pcm_link_rwsem); return res; } @@ -1592,12 +1570,9 @@ int snd_pcm_drain_done(struct snd_pcm_substream *substream) */ int snd_pcm_stop_xrun(struct snd_pcm_substream *substream) { - unsigned long flags; - - snd_pcm_stream_lock_irqsave(substream, flags); + guard(pcm_stream_lock_irqsave)(substream); if (substream->runtime && snd_pcm_running(substream)) __snd_pcm_xrun(substream); - snd_pcm_stream_unlock_irqrestore(substream, flags); return 0; } EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun); @@ -1749,14 +1724,9 @@ static const struct action_ops snd_pcm_action_suspend = { */ static int snd_pcm_suspend(struct snd_pcm_substream *substream) { - int err; - unsigned long flags; - - snd_pcm_stream_lock_irqsave(substream, flags); - err = snd_pcm_action(&snd_pcm_action_suspend, substream, - ACTION_ARG_IGNORE); - snd_pcm_stream_unlock_irqrestore(substream, flags); - return err; + guard(pcm_stream_lock_irqsave)(substream); + return snd_pcm_action(&snd_pcm_action_suspend, substream, + ACTION_ARG_IGNORE); } /** @@ -1872,22 +1842,17 @@ static int snd_pcm_resume(struct snd_pcm_substream *substream) static int snd_pcm_xrun(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; - int result; - snd_pcm_stream_lock_irq(substream); + guard(pcm_stream_lock_irq)(substream); switch (runtime->state) { case SNDRV_PCM_STATE_XRUN: - result = 0; /* already there */ - break; + return 0; /* already there */ case SNDRV_PCM_STATE_RUNNING: __snd_pcm_xrun(substream); - result = 0; - break; + return 0; default: - result = -EBADFD; + return -EBADFD; } - snd_pcm_stream_unlock_irq(substream); - return result; } /* @@ -1916,13 +1881,12 @@ static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int err = snd_pcm_ops_ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); if (err < 0) return err; - snd_pcm_stream_lock_irq(substream); + guard(pcm_stream_lock_irq)(substream); runtime->hw_ptr_base = 0; runtime->hw_ptr_interrupt = runtime->status->hw_ptr - runtime->status->hw_ptr % runtime->period_size; runtime->silence_start = runtime->status->hw_ptr; runtime->silence_filled = 0; - snd_pcm_stream_unlock_irq(substream); return 0; } @@ -1930,12 +1894,11 @@ static void snd_pcm_post_reset(struct snd_pcm_substream *substream, snd_pcm_state_t state) { struct snd_pcm_runtime *runtime = substream->runtime; - snd_pcm_stream_lock_irq(substream); + guard(pcm_stream_lock_irq)(substream); runtime->control->appl_ptr = runtime->status->hw_ptr; if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && runtime->silence_size > 0) snd_pcm_playback_silence(substream, ULONG_MAX); - snd_pcm_stream_unlock_irq(substream); } static const struct action_ops snd_pcm_action_reset = { @@ -2011,16 +1974,16 @@ static int snd_pcm_prepare(struct snd_pcm_substream *substream, else f_flags = substream->f_flags; - snd_pcm_stream_lock_irq(substream); - switch (substream->runtime->state) { - case SNDRV_PCM_STATE_PAUSED: - snd_pcm_pause(substream, false); - fallthrough; - case SNDRV_PCM_STATE_SUSPENDED: - snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); - break; + scoped_guard(pcm_stream_lock_irq, substream) { + switch (substream->runtime->state) { + case SNDRV_PCM_STATE_PAUSED: + snd_pcm_pause(substream, false); + fallthrough; + case SNDRV_PCM_STATE_SUSPENDED: + snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); + break; + } } - snd_pcm_stream_unlock_irq(substream); return snd_pcm_action_nonatomic(&snd_pcm_action_prepare, substream, @@ -2237,14 +2200,13 @@ static int snd_pcm_drop(struct snd_pcm_substream *substream) runtime->state == SNDRV_PCM_STATE_DISCONNECTED) return -EBADFD; - snd_pcm_stream_lock_irq(substream); + guard(pcm_stream_lock_irq)(substream); /* resume pause */ if (runtime->state == SNDRV_PCM_STATE_PAUSED) snd_pcm_pause(substream, false); snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ - snd_pcm_stream_unlock_irq(substream); return result; } @@ -2273,53 +2235,44 @@ static bool is_pcm_file(struct file *file) */ static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) { - int res = 0; struct snd_pcm_file *pcm_file; struct snd_pcm_substream *substream1; - struct snd_pcm_group *group, *target_group; + struct snd_pcm_group *group __free(kfree) = NULL; + struct snd_pcm_group *target_group; bool nonatomic = substream->pcm->nonatomic; - struct fd f = fdget(fd); + CLASS(fd, f)(fd); if (!f.file) return -EBADFD; - if (!is_pcm_file(f.file)) { - res = -EBADFD; - goto _badf; - } + if (!is_pcm_file(f.file)) + return -EBADFD; + pcm_file = f.file->private_data; substream1 = pcm_file->substream; - if (substream == substream1) { - res = -EINVAL; - goto _badf; - } + if (substream == substream1) + return -EINVAL; group = kzalloc(sizeof(*group), GFP_KERNEL); - if (!group) { - res = -ENOMEM; - goto _nolock; - } + if (!group) + return -ENOMEM; snd_pcm_group_init(group); - down_write(&snd_pcm_link_rwsem); + guard(rwsem_write)(&snd_pcm_link_rwsem); if (substream->runtime->state == SNDRV_PCM_STATE_OPEN || substream->runtime->state != substream1->runtime->state || - substream->pcm->nonatomic != substream1->pcm->nonatomic) { - res = -EBADFD; - goto _end; - } - if (snd_pcm_stream_linked(substream1)) { - res = -EALREADY; - goto _end; - } + substream->pcm->nonatomic != substream1->pcm->nonatomic) + return -EBADFD; + if (snd_pcm_stream_linked(substream1)) + return -EALREADY; - snd_pcm_stream_lock_irq(substream); - if (!snd_pcm_stream_linked(substream)) { - snd_pcm_group_assign(substream, group); - group = NULL; /* assigned, don't free this one below */ + scoped_guard(pcm_stream_lock_irq, substream) { + if (!snd_pcm_stream_linked(substream)) { + snd_pcm_group_assign(substream, group); + group = NULL; /* assigned, don't free this one below */ + } + target_group = substream->group; } - target_group = substream->group; - snd_pcm_stream_unlock_irq(substream); snd_pcm_group_lock_irq(target_group, nonatomic); snd_pcm_stream_lock_nested(substream1); @@ -2327,13 +2280,7 @@ static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) refcount_inc(&target_group->refs); snd_pcm_stream_unlock(substream1); snd_pcm_group_unlock_irq(target_group, nonatomic); - _end: - up_write(&snd_pcm_link_rwsem); - _nolock: - kfree(group); - _badf: - fdput(f); - return res; + return 0; } static void relink_to_local(struct snd_pcm_substream *substream) @@ -2348,14 +2295,11 @@ static int snd_pcm_unlink(struct snd_pcm_substream *substream) struct snd_pcm_group *group; bool nonatomic = substream->pcm->nonatomic; bool do_free = false; - int res = 0; - down_write(&snd_pcm_link_rwsem); + guard(rwsem_write)(&snd_pcm_link_rwsem); - if (!snd_pcm_stream_linked(substream)) { - res = -EALREADY; - goto _end; - } + if (!snd_pcm_stream_linked(substream)) + return -EALREADY; group = substream->group; snd_pcm_group_lock_irq(group, nonatomic); @@ -2374,10 +2318,7 @@ static int snd_pcm_unlink(struct snd_pcm_substream *substream) snd_pcm_group_unlock_irq(group, nonatomic); if (do_free) kfree(group); - - _end: - up_write(&snd_pcm_link_rwsem); - return res; + return 0; } /* @@ -2950,10 +2891,10 @@ static int snd_pcm_release(struct inode *inode, struct file *file) /* block until the device gets woken up as it may touch the hardware */ snd_power_wait(pcm->card); - mutex_lock(&pcm->open_mutex); - snd_pcm_release_substream(substream); - kfree(pcm_file); - mutex_unlock(&pcm->open_mutex); + scoped_guard(mutex, &pcm->open_mutex) { + snd_pcm_release_substream(substream); + kfree(pcm_file); + } wake_up(&pcm->open_wait); module_put(pcm->card->module); snd_card_file_remove(pcm->card, file); @@ -3037,12 +2978,12 @@ static snd_pcm_sframes_t snd_pcm_rewind(struct snd_pcm_substream *substream, if (frames == 0) return 0; - snd_pcm_stream_lock_irq(substream); - ret = do_pcm_hwsync(substream); - if (!ret) - ret = rewind_appl_ptr(substream, frames, - snd_pcm_hw_avail(substream)); - snd_pcm_stream_unlock_irq(substream); + scoped_guard(pcm_stream_lock_irq, substream) { + ret = do_pcm_hwsync(substream); + if (!ret) + ret = rewind_appl_ptr(substream, frames, + snd_pcm_hw_avail(substream)); + } if (ret >= 0) snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_DEVICE); return ret; @@ -3056,12 +2997,12 @@ static snd_pcm_sframes_t snd_pcm_forward(struct snd_pcm_substream *substream, if (frames == 0) return 0; - snd_pcm_stream_lock_irq(substream); - ret = do_pcm_hwsync(substream); - if (!ret) - ret = forward_appl_ptr(substream, frames, - snd_pcm_avail(substream)); - snd_pcm_stream_unlock_irq(substream); + scoped_guard(pcm_stream_lock_irq, substream) { + ret = do_pcm_hwsync(substream); + if (!ret) + ret = forward_appl_ptr(substream, frames, + snd_pcm_avail(substream)); + } if (ret >= 0) snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_DEVICE); return ret; @@ -3072,11 +3013,11 @@ static int snd_pcm_delay(struct snd_pcm_substream *substream, { int err; - snd_pcm_stream_lock_irq(substream); - err = do_pcm_hwsync(substream); - if (delay && !err) - *delay = snd_pcm_calc_delay(substream); - snd_pcm_stream_unlock_irq(substream); + scoped_guard(pcm_stream_lock_irq, substream) { + err = do_pcm_hwsync(substream); + if (delay && !err) + *delay = snd_pcm_calc_delay(substream); + } snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_CPU); return err; @@ -3108,27 +3049,25 @@ static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, if (err < 0) return err; } - snd_pcm_stream_lock_irq(substream); - if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) { - err = pcm_lib_apply_appl_ptr(substream, - sync_ptr.c.control.appl_ptr); - if (err < 0) { - snd_pcm_stream_unlock_irq(substream); - return err; + scoped_guard(pcm_stream_lock_irq, substream) { + if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) { + err = pcm_lib_apply_appl_ptr(substream, + sync_ptr.c.control.appl_ptr); + if (err < 0) + return err; + } else { + sync_ptr.c.control.appl_ptr = control->appl_ptr; } - } else { - sync_ptr.c.control.appl_ptr = control->appl_ptr; + if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) + control->avail_min = sync_ptr.c.control.avail_min; + else + sync_ptr.c.control.avail_min = control->avail_min; + sync_ptr.s.status.state = status->state; + sync_ptr.s.status.hw_ptr = status->hw_ptr; + sync_ptr.s.status.tstamp = status->tstamp; + sync_ptr.s.status.suspended_state = status->suspended_state; + sync_ptr.s.status.audio_tstamp = status->audio_tstamp; } - if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) - control->avail_min = sync_ptr.c.control.avail_min; - else - sync_ptr.c.control.avail_min = control->avail_min; - sync_ptr.s.status.state = status->state; - sync_ptr.s.status.hw_ptr = status->hw_ptr; - sync_ptr.s.status.tstamp = status->tstamp; - sync_ptr.s.status.suspended_state = status->suspended_state; - sync_ptr.s.status.audio_tstamp = status->audio_tstamp; - snd_pcm_stream_unlock_irq(substream); if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_DEVICE); if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) @@ -3206,27 +3145,25 @@ static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream, boundary = recalculate_boundary(runtime); if (! boundary) boundary = 0x7fffffff; - snd_pcm_stream_lock_irq(substream); - /* FIXME: we should consider the boundary for the sync from app */ - if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL)) { - err = pcm_lib_apply_appl_ptr(substream, - scontrol.appl_ptr); - if (err < 0) { - snd_pcm_stream_unlock_irq(substream); - return err; - } - } else - scontrol.appl_ptr = control->appl_ptr % boundary; - if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) - control->avail_min = scontrol.avail_min; - else - scontrol.avail_min = control->avail_min; - sstatus.state = status->state; - sstatus.hw_ptr = status->hw_ptr % boundary; - sstatus.tstamp = status->tstamp; - sstatus.suspended_state = status->suspended_state; - sstatus.audio_tstamp = status->audio_tstamp; - snd_pcm_stream_unlock_irq(substream); + scoped_guard(pcm_stream_lock_irq, substream) { + /* FIXME: we should consider the boundary for the sync from app */ + if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL)) { + err = pcm_lib_apply_appl_ptr(substream, + scontrol.appl_ptr); + if (err < 0) + return err; + } else + scontrol.appl_ptr = control->appl_ptr % boundary; + if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) + control->avail_min = scontrol.avail_min; + else + scontrol.avail_min = control->avail_min; + sstatus.state = status->state; + sstatus.hw_ptr = status->hw_ptr % boundary; + sstatus.tstamp = status->tstamp; + sstatus.suspended_state = status->suspended_state; + sstatus.audio_tstamp = status->audio_tstamp; + } if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL)) snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_DEVICE); if (put_user(sstatus.state, &src->s.status.state) || @@ -3284,7 +3221,7 @@ static int snd_pcm_xfern_frames_ioctl(struct snd_pcm_substream *substream, { struct snd_xfern xfern; struct snd_pcm_runtime *runtime = substream->runtime; - void *bufs; + void *bufs __free(kfree) = NULL; snd_pcm_sframes_t result; if (runtime->state == SNDRV_PCM_STATE_OPEN) @@ -3298,12 +3235,11 @@ static int snd_pcm_xfern_frames_ioctl(struct snd_pcm_substream *substream, bufs = memdup_user(xfern.bufs, sizeof(void *) * runtime->channels); if (IS_ERR(bufs)) - return PTR_ERR(bufs); + return PTR_ERR(no_free_ptr(bufs)); if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) result = snd_pcm_lib_writev(substream, bufs, xfern.frames); else result = snd_pcm_lib_readv(substream, bufs, xfern.frames); - kfree(bufs); if (put_user(result, &_xfern->result)) return -EFAULT; return result < 0 ? result : 0; @@ -3571,7 +3507,7 @@ static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to) struct snd_pcm_runtime *runtime; snd_pcm_sframes_t result; unsigned long i; - void __user **bufs; + void __user **bufs __free(kfree) = NULL; snd_pcm_uframes_t frames; const struct iovec *iov = iter_iov(to); @@ -3600,7 +3536,6 @@ static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to) result = snd_pcm_lib_readv(substream, bufs, frames); if (result > 0) result = frames_to_bytes(runtime, result); - kfree(bufs); return result; } @@ -3611,7 +3546,7 @@ static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from) struct snd_pcm_runtime *runtime; snd_pcm_sframes_t result; unsigned long i; - void __user **bufs; + void __user **bufs __free(kfree) = NULL; snd_pcm_uframes_t frames; const struct iovec *iov = iter_iov(from); @@ -3639,7 +3574,6 @@ static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from) result = snd_pcm_lib_writev(substream, bufs, frames); if (result > 0) result = frames_to_bytes(runtime, result); - kfree(bufs); return result; } @@ -3668,7 +3602,7 @@ static __poll_t snd_pcm_poll(struct file *file, poll_table *wait) poll_wait(file, &runtime->sleep, wait); mask = 0; - snd_pcm_stream_lock_irq(substream); + guard(pcm_stream_lock_irq)(substream); avail = snd_pcm_avail(substream); switch (runtime->state) { case SNDRV_PCM_STATE_RUNNING: @@ -3688,7 +3622,6 @@ static __poll_t snd_pcm_poll(struct file *file, poll_table *wait) mask = ok | EPOLLERR; break; } - snd_pcm_stream_unlock_irq(substream); return mask; } @@ -4081,8 +4014,8 @@ static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *opara static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, struct snd_pcm_hw_params_old __user * _oparams) { - struct snd_pcm_hw_params *params; - struct snd_pcm_hw_params_old *oparams = NULL; + struct snd_pcm_hw_params *params __free(kfree) = NULL; + struct snd_pcm_hw_params_old *oparams __free(kfree) = NULL; int err; params = kmalloc(sizeof(*params), GFP_KERNEL); @@ -4090,34 +4023,28 @@ static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, return -ENOMEM; oparams = memdup_user(_oparams, sizeof(*oparams)); - if (IS_ERR(oparams)) { - err = PTR_ERR(oparams); - goto out; - } + if (IS_ERR(oparams)) + return PTR_ERR(no_free_ptr(oparams)); snd_pcm_hw_convert_from_old_params(params, oparams); err = snd_pcm_hw_refine(substream, params); if (err < 0) - goto out_old; + return err; err = fixup_unreferenced_params(substream, params); if (err < 0) - goto out_old; + return err; snd_pcm_hw_convert_to_old_params(oparams, params); if (copy_to_user(_oparams, oparams, sizeof(*oparams))) - err = -EFAULT; -out_old: - kfree(oparams); -out: - kfree(params); - return err; + return -EFAULT; + return 0; } static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, struct snd_pcm_hw_params_old __user * _oparams) { - struct snd_pcm_hw_params *params; - struct snd_pcm_hw_params_old *oparams = NULL; + struct snd_pcm_hw_params *params __free(kfree) = NULL; + struct snd_pcm_hw_params_old *oparams __free(kfree) = NULL; int err; params = kmalloc(sizeof(*params), GFP_KERNEL); @@ -4125,24 +4052,18 @@ static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, return -ENOMEM; oparams = memdup_user(_oparams, sizeof(*oparams)); - if (IS_ERR(oparams)) { - err = PTR_ERR(oparams); - goto out; - } + if (IS_ERR(oparams)) + return PTR_ERR(no_free_ptr(oparams)); snd_pcm_hw_convert_from_old_params(params, oparams); err = snd_pcm_hw_params(substream, params); if (err < 0) - goto out_old; + return err; snd_pcm_hw_convert_to_old_params(oparams, params); if (copy_to_user(_oparams, oparams, sizeof(*oparams))) - err = -EFAULT; -out_old: - kfree(oparams); -out: - kfree(params); - return err; + return -EFAULT; + return 0; } #endif /* CONFIG_SND_SUPPORT_OLD_API */ diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c index 1431cb9978..7accf9a1dd 100644 --- a/sound/core/rawmidi.c +++ b/sound/core/rawmidi.c @@ -105,13 +105,8 @@ static inline bool __snd_rawmidi_ready(struct snd_rawmidi_runtime *runtime) static bool snd_rawmidi_ready(struct snd_rawmidi_substream *substream) { - unsigned long flags; - bool ready; - - spin_lock_irqsave(&substream->lock, flags); - ready = __snd_rawmidi_ready(substream->runtime); - spin_unlock_irqrestore(&substream->lock, flags); - return ready; + guard(spinlock_irqsave)(&substream->lock); + return __snd_rawmidi_ready(substream->runtime); } static inline int snd_rawmidi_ready_append(struct snd_rawmidi_substream *substream, @@ -238,12 +233,9 @@ static void __reset_runtime_ptrs(struct snd_rawmidi_runtime *runtime, static void reset_runtime_ptrs(struct snd_rawmidi_substream *substream, bool is_input) { - unsigned long flags; - - spin_lock_irqsave(&substream->lock, flags); + guard(spinlock_irqsave)(&substream->lock); if (substream->opened && substream->runtime) __reset_runtime_ptrs(substream->runtime, is_input); - spin_unlock_irqrestore(&substream->lock, flags); } int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream) @@ -260,33 +252,29 @@ int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream) long timeout; struct snd_rawmidi_runtime *runtime; - spin_lock_irq(&substream->lock); - runtime = substream->runtime; - if (!substream->opened || !runtime || !runtime->buffer) { - err = -EINVAL; - } else { + scoped_guard(spinlock_irq, &substream->lock) { + runtime = substream->runtime; + if (!substream->opened || !runtime || !runtime->buffer) + return -EINVAL; snd_rawmidi_buffer_ref(runtime); runtime->drain = 1; } - spin_unlock_irq(&substream->lock); - if (err < 0) - return err; timeout = wait_event_interruptible_timeout(runtime->sleep, (runtime->avail >= runtime->buffer_size), 10*HZ); - spin_lock_irq(&substream->lock); - if (signal_pending(current)) - err = -ERESTARTSYS; - if (runtime->avail < runtime->buffer_size && !timeout) { - rmidi_warn(substream->rmidi, - "rawmidi drain error (avail = %li, buffer_size = %li)\n", - (long)runtime->avail, (long)runtime->buffer_size); - err = -EIO; + scoped_guard(spinlock_irq, &substream->lock) { + if (signal_pending(current)) + err = -ERESTARTSYS; + if (runtime->avail < runtime->buffer_size && !timeout) { + rmidi_warn(substream->rmidi, + "rawmidi drain error (avail = %li, buffer_size = %li)\n", + (long)runtime->avail, (long)runtime->buffer_size); + err = -EIO; + } + runtime->drain = 0; } - runtime->drain = 0; - spin_unlock_irq(&substream->lock); if (err != -ERESTARTSYS) { /* we need wait a while to make sure that Tx FIFOs are empty */ @@ -297,9 +285,8 @@ int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream) snd_rawmidi_drop_output(substream); } - spin_lock_irq(&substream->lock); - snd_rawmidi_buffer_unref(runtime); - spin_unlock_irq(&substream->lock); + scoped_guard(spinlock_irq, &substream->lock) + snd_rawmidi_buffer_unref(runtime); return err; } @@ -363,14 +350,13 @@ static int open_substream(struct snd_rawmidi *rmidi, snd_rawmidi_runtime_free(substream); return err; } - spin_lock_irq(&substream->lock); + guard(spinlock_irq)(&substream->lock); substream->opened = 1; substream->active_sensing = 0; if (mode & SNDRV_RAWMIDI_LFLG_APPEND) substream->append = 1; substream->pid = get_pid(task_pid(current)); rmidi->streams[substream->stream].substream_opened++; - spin_unlock_irq(&substream->lock); } substream->use_count++; return 0; @@ -433,9 +419,8 @@ int snd_rawmidi_kernel_open(struct snd_rawmidi *rmidi, int subdevice, if (!try_module_get(rmidi->card->module)) return -ENXIO; - mutex_lock(&rmidi->open_mutex); + guard(mutex)(&rmidi->open_mutex); err = rawmidi_open_priv(rmidi, subdevice, mode, rfile); - mutex_unlock(&rmidi->open_mutex); if (err < 0) module_put(rmidi->card->module); return err; @@ -568,10 +553,10 @@ static void close_substream(struct snd_rawmidi *rmidi, } snd_rawmidi_buffer_ref_sync(substream); } - spin_lock_irq(&substream->lock); - substream->opened = 0; - substream->append = 0; - spin_unlock_irq(&substream->lock); + scoped_guard(spinlock_irq, &substream->lock) { + substream->opened = 0; + substream->append = 0; + } substream->ops->close(substream); if (substream->runtime->private_free) substream->runtime->private_free(substream); @@ -586,7 +571,7 @@ static void rawmidi_release_priv(struct snd_rawmidi_file *rfile) struct snd_rawmidi *rmidi; rmidi = rfile->rmidi; - mutex_lock(&rmidi->open_mutex); + guard(mutex)(&rmidi->open_mutex); if (rfile->input) { close_substream(rmidi, rfile->input, 1); rfile->input = NULL; @@ -596,7 +581,6 @@ static void rawmidi_release_priv(struct snd_rawmidi_file *rfile) rfile->output = NULL; } rfile->rmidi = NULL; - mutex_unlock(&rmidi->open_mutex); wake_up(&rmidi->open_wait); } @@ -695,12 +679,8 @@ static int __snd_rawmidi_info_select(struct snd_card *card, int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info) { - int ret; - - mutex_lock(®ister_mutex); - ret = __snd_rawmidi_info_select(card, info); - mutex_unlock(®ister_mutex); - return ret; + guard(mutex)(®ister_mutex); + return __snd_rawmidi_info_select(card, info); } EXPORT_SYMBOL(snd_rawmidi_info_select); @@ -744,9 +724,8 @@ static int resize_runtime_buffer(struct snd_rawmidi_substream *substream, newbuf = kvzalloc(params->buffer_size, GFP_KERNEL); if (!newbuf) return -ENOMEM; - spin_lock_irq(&substream->lock); + guard(spinlock_irq)(&substream->lock); if (runtime->buffer_ref) { - spin_unlock_irq(&substream->lock); kvfree(newbuf); return -EBUSY; } @@ -754,7 +733,6 @@ static int resize_runtime_buffer(struct snd_rawmidi_substream *substream, runtime->buffer = newbuf; runtime->buffer_size = params->buffer_size; __reset_runtime_ptrs(runtime, is_input); - spin_unlock_irq(&substream->lock); kvfree(oldbuf); } runtime->avail_min = params->avail_min; @@ -767,15 +745,12 @@ int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream, int err; snd_rawmidi_drain_output(substream); - mutex_lock(&substream->rmidi->open_mutex); + guard(mutex)(&substream->rmidi->open_mutex); if (substream->append && substream->use_count > 1) - err = -EBUSY; - else - err = resize_runtime_buffer(substream, params, false); - + return -EBUSY; + err = resize_runtime_buffer(substream, params, false); if (!err) substream->active_sensing = !params->no_active_sensing; - mutex_unlock(&substream->rmidi->open_mutex); return err; } EXPORT_SYMBOL(snd_rawmidi_output_params); @@ -788,7 +763,7 @@ int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream, int err; snd_rawmidi_drain_input(substream); - mutex_lock(&substream->rmidi->open_mutex); + guard(mutex)(&substream->rmidi->open_mutex); if (framing == SNDRV_RAWMIDI_MODE_FRAMING_NONE && clock_type != SNDRV_RAWMIDI_MODE_CLOCK_NONE) err = -EINVAL; else if (clock_type > SNDRV_RAWMIDI_MODE_CLOCK_MONOTONIC_RAW) @@ -802,7 +777,6 @@ int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream, substream->framing = framing; substream->clock_type = clock_type; } - mutex_unlock(&substream->rmidi->open_mutex); return 0; } EXPORT_SYMBOL(snd_rawmidi_input_params); @@ -814,9 +788,8 @@ static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream, memset(status, 0, sizeof(*status)); status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT; - spin_lock_irq(&substream->lock); + guard(spinlock_irq)(&substream->lock); status->avail = runtime->avail; - spin_unlock_irq(&substream->lock); return 0; } @@ -827,11 +800,10 @@ static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream, memset(status, 0, sizeof(*status)); status->stream = SNDRV_RAWMIDI_STREAM_INPUT; - spin_lock_irq(&substream->lock); + guard(spinlock_irq)(&substream->lock); status->avail = runtime->avail; status->xruns = runtime->xruns; runtime->xruns = 0; - spin_unlock_irq(&substream->lock); return 0; } @@ -1025,19 +997,19 @@ static int snd_rawmidi_next_device(struct snd_card *card, int __user *argp, return -EFAULT; if (device >= SNDRV_RAWMIDI_DEVICES) /* next device is -1 */ device = SNDRV_RAWMIDI_DEVICES - 1; - mutex_lock(®ister_mutex); - device = device < 0 ? 0 : device + 1; - for (; device < SNDRV_RAWMIDI_DEVICES; device++) { - rmidi = snd_rawmidi_search(card, device); - if (!rmidi) - continue; - is_ump = rawmidi_is_ump(rmidi); - if (find_ump == is_ump) - break; + scoped_guard(mutex, ®ister_mutex) { + device = device < 0 ? 0 : device + 1; + for (; device < SNDRV_RAWMIDI_DEVICES; device++) { + rmidi = snd_rawmidi_search(card, device); + if (!rmidi) + continue; + is_ump = rawmidi_is_ump(rmidi); + if (find_ump == is_ump) + break; + } + if (device == SNDRV_RAWMIDI_DEVICES) + device = -1; } - if (device == SNDRV_RAWMIDI_DEVICES) - device = -1; - mutex_unlock(®ister_mutex); if (put_user(device, argp)) return -EFAULT; return 0; @@ -1050,18 +1022,16 @@ static int snd_rawmidi_call_ump_ioctl(struct snd_card *card, int cmd, { struct snd_ump_endpoint_info __user *info = argp; struct snd_rawmidi *rmidi; - int device, ret; + int device; if (get_user(device, &info->device)) return -EFAULT; - mutex_lock(®ister_mutex); + guard(mutex)(®ister_mutex); rmidi = snd_rawmidi_search(card, device); if (rmidi && rmidi->ops && rmidi->ops->ioctl) - ret = rmidi->ops->ioctl(rmidi, cmd, argp); + return rmidi->ops->ioctl(rmidi, cmd, argp); else - ret = -ENXIO; - mutex_unlock(®ister_mutex); - return ret; + return -ENXIO; } #endif @@ -1168,27 +1138,23 @@ static struct timespec64 get_framing_tstamp(struct snd_rawmidi_substream *substr int snd_rawmidi_receive(struct snd_rawmidi_substream *substream, const unsigned char *buffer, int count) { - unsigned long flags; struct timespec64 ts64 = get_framing_tstamp(substream); int result = 0, count1; struct snd_rawmidi_runtime *runtime; - spin_lock_irqsave(&substream->lock, flags); - if (!substream->opened) { - result = -EBADFD; - goto unlock; - } + guard(spinlock_irqsave)(&substream->lock); + if (!substream->opened) + return -EBADFD; runtime = substream->runtime; if (!runtime || !runtime->buffer) { rmidi_dbg(substream->rmidi, "snd_rawmidi_receive: input is not active!!!\n"); - result = -EINVAL; - goto unlock; + return -EINVAL; } count = get_aligned_size(runtime, count); if (!count) - goto unlock; + return result; if (substream->framing == SNDRV_RAWMIDI_MODE_FRAMING_TSTAMP) { result = receive_with_tstamp_framing(substream, buffer, count, &ts64); @@ -1211,7 +1177,7 @@ int snd_rawmidi_receive(struct snd_rawmidi_substream *substream, count1 = runtime->buffer_size - runtime->avail; count1 = get_aligned_size(runtime, count1); if (!count1) - goto unlock; + return result; memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1); runtime->hw_ptr += count1; runtime->hw_ptr %= runtime->buffer_size; @@ -1239,8 +1205,6 @@ int snd_rawmidi_receive(struct snd_rawmidi_substream *substream, else if (__snd_rawmidi_ready(runtime)) wake_up(&runtime->sleep); } - unlock: - spin_unlock_irqrestore(&substream->lock, flags); return result; } EXPORT_SYMBOL(snd_rawmidi_receive); @@ -1362,20 +1326,15 @@ static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t coun int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream) { struct snd_rawmidi_runtime *runtime; - int result; - unsigned long flags; - spin_lock_irqsave(&substream->lock, flags); + guard(spinlock_irqsave)(&substream->lock); runtime = substream->runtime; if (!substream->opened || !runtime || !runtime->buffer) { rmidi_dbg(substream->rmidi, "snd_rawmidi_transmit_empty: output is not active!!!\n"); - result = 1; - } else { - result = runtime->avail >= runtime->buffer_size; + return 1; } - spin_unlock_irqrestore(&substream->lock, flags); - return result; + return (runtime->avail >= runtime->buffer_size); } EXPORT_SYMBOL(snd_rawmidi_transmit_empty); @@ -1449,16 +1408,10 @@ static int __snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, unsigned char *buffer, int count) { - int result; - unsigned long flags; - - spin_lock_irqsave(&substream->lock, flags); + guard(spinlock_irqsave)(&substream->lock); if (!substream->opened || !substream->runtime) - result = -EBADFD; - else - result = __snd_rawmidi_transmit_peek(substream, buffer, count); - spin_unlock_irqrestore(&substream->lock, flags); - return result; + return -EBADFD; + return __snd_rawmidi_transmit_peek(substream, buffer, count); } EXPORT_SYMBOL(snd_rawmidi_transmit_peek); @@ -1505,16 +1458,10 @@ static int __snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, */ int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count) { - int result; - unsigned long flags; - - spin_lock_irqsave(&substream->lock, flags); + guard(spinlock_irqsave)(&substream->lock); if (!substream->opened || !substream->runtime) - result = -EBADFD; - else - result = __snd_rawmidi_transmit_ack(substream, count); - spin_unlock_irqrestore(&substream->lock, flags); - return result; + return -EBADFD; + return __snd_rawmidi_transmit_ack(substream, count); } EXPORT_SYMBOL(snd_rawmidi_transmit_ack); @@ -1531,21 +1478,13 @@ EXPORT_SYMBOL(snd_rawmidi_transmit_ack); int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream, unsigned char *buffer, int count) { - int result; - unsigned long flags; - - spin_lock_irqsave(&substream->lock, flags); + guard(spinlock_irqsave)(&substream->lock); if (!substream->opened) - result = -EBADFD; - else { - count = __snd_rawmidi_transmit_peek(substream, buffer, count); - if (count <= 0) - result = count; - else - result = __snd_rawmidi_transmit_ack(substream, count); - } - spin_unlock_irqrestore(&substream->lock, flags); - return result; + return -EBADFD; + count = __snd_rawmidi_transmit_peek(substream, buffer, count); + if (count <= 0) + return count; + return __snd_rawmidi_transmit_ack(substream, count); } EXPORT_SYMBOL(snd_rawmidi_transmit); @@ -1558,17 +1497,15 @@ EXPORT_SYMBOL(snd_rawmidi_transmit); int snd_rawmidi_proceed(struct snd_rawmidi_substream *substream) { struct snd_rawmidi_runtime *runtime; - unsigned long flags; int count = 0; - spin_lock_irqsave(&substream->lock, flags); + guard(spinlock_irqsave)(&substream->lock); runtime = substream->runtime; if (substream->opened && runtime && runtime->avail < runtime->buffer_size) { count = runtime->buffer_size - runtime->avail; __snd_rawmidi_transmit_ack(substream, count); } - spin_unlock_irqrestore(&substream->lock, flags); return count; } EXPORT_SYMBOL(snd_rawmidi_proceed); @@ -1772,7 +1709,7 @@ static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry, rawmidi_is_ump(rmidi) ? "UMP" : "Legacy"); if (rmidi->ops && rmidi->ops->proc_read) rmidi->ops->proc_read(entry, buffer); - mutex_lock(&rmidi->open_mutex); + guard(mutex)(&rmidi->open_mutex); if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) { list_for_each_entry(substream, &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams, @@ -1787,10 +1724,10 @@ static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry, " Owner PID : %d\n", pid_vnr(substream->pid)); runtime = substream->runtime; - spin_lock_irq(&substream->lock); - buffer_size = runtime->buffer_size; - avail = runtime->avail; - spin_unlock_irq(&substream->lock); + scoped_guard(spinlock_irq, &substream->lock) { + buffer_size = runtime->buffer_size; + avail = runtime->avail; + } snd_iprintf(buffer, " Mode : %s\n" " Buffer size : %lu\n" @@ -1814,11 +1751,11 @@ static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry, " Owner PID : %d\n", pid_vnr(substream->pid)); runtime = substream->runtime; - spin_lock_irq(&substream->lock); - buffer_size = runtime->buffer_size; - avail = runtime->avail; - xruns = runtime->xruns; - spin_unlock_irq(&substream->lock); + scoped_guard(spinlock_irq, &substream->lock) { + buffer_size = runtime->buffer_size; + avail = runtime->avail; + xruns = runtime->xruns; + } snd_iprintf(buffer, " Buffer size : %lu\n" " Avail : %lu\n" @@ -1835,7 +1772,6 @@ static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry, } } } - mutex_unlock(&rmidi->open_mutex); } /* @@ -2024,12 +1960,12 @@ static int snd_rawmidi_dev_register(struct snd_device *device) if (rmidi->device >= SNDRV_RAWMIDI_DEVICES) return -ENOMEM; err = 0; - mutex_lock(®ister_mutex); - if (snd_rawmidi_search(rmidi->card, rmidi->device)) - err = -EBUSY; - else - list_add_tail(&rmidi->list, &snd_rawmidi_devices); - mutex_unlock(®ister_mutex); + scoped_guard(mutex, ®ister_mutex) { + if (snd_rawmidi_search(rmidi->card, rmidi->device)) + err = -EBUSY; + else + list_add_tail(&rmidi->list, &snd_rawmidi_devices); + } if (err < 0) return err; @@ -2102,9 +2038,8 @@ static int snd_rawmidi_dev_register(struct snd_device *device) error_unregister: snd_unregister_device(rmidi->dev); error: - mutex_lock(®ister_mutex); - list_del(&rmidi->list); - mutex_unlock(®ister_mutex); + scoped_guard(mutex, ®ister_mutex) + list_del(&rmidi->list); return err; } @@ -2113,8 +2048,8 @@ static int snd_rawmidi_dev_disconnect(struct snd_device *device) struct snd_rawmidi *rmidi = device->device_data; int dir; - mutex_lock(®ister_mutex); - mutex_lock(&rmidi->open_mutex); + guard(mutex)(®ister_mutex); + guard(mutex)(&rmidi->open_mutex); wake_up(&rmidi->open_wait); list_del_init(&rmidi->list); for (dir = 0; dir < 2; dir++) { @@ -2140,8 +2075,6 @@ static int snd_rawmidi_dev_disconnect(struct snd_device *device) } #endif /* CONFIG_SND_OSSEMUL */ snd_unregister_device(rmidi->dev); - mutex_unlock(&rmidi->open_mutex); - mutex_unlock(®ister_mutex); return 0; } diff --git a/sound/core/seq/Kconfig b/sound/core/seq/Kconfig index c14981daf9..0374bbf51c 100644 --- a/sound/core/seq/Kconfig +++ b/sound/core/seq/Kconfig @@ -71,7 +71,6 @@ config SND_SEQ_UMP among legacy and UMP clients. config SND_SEQ_UMP_CLIENT - tristate def_tristate SND_UMP endif # SND_SEQUENCER diff --git a/sound/core/seq/oss/seq_oss_device.h b/sound/core/seq/oss/seq_oss_device.h index 6c2c4fb9b7..f0e964b19a 100644 --- a/sound/core/seq/oss/seq_oss_device.h +++ b/sound/core/seq/oss/seq_oss_device.h @@ -163,6 +163,6 @@ snd_seq_oss_fill_addr(struct seq_oss_devinfo *dp, struct snd_seq_event *ev, /* misc. functions for proc interface */ -char *enabled_str(int bool); +char *enabled_str(bool b); #endif /* __SEQ_OSS_DEVICE_H */ diff --git a/sound/core/seq/oss/seq_oss_init.c b/sound/core/seq/oss/seq_oss_init.c index 42d4e7535a..676246fa02 100644 --- a/sound/core/seq/oss/seq_oss_init.c +++ b/sound/core/seq/oss/seq_oss_init.c @@ -63,20 +63,18 @@ int __init snd_seq_oss_create_client(void) { int rc; - struct snd_seq_port_info *port; + struct snd_seq_port_info *port __free(kfree) = NULL; struct snd_seq_port_callback port_callback; port = kzalloc(sizeof(*port), GFP_KERNEL); - if (!port) { - rc = -ENOMEM; - goto __error; - } + if (!port) + return -ENOMEM; /* create ALSA client */ rc = snd_seq_create_kernel_client(NULL, SNDRV_SEQ_CLIENT_OSS, "OSS sequencer"); if (rc < 0) - goto __error; + return rc; system_client = rc; @@ -104,14 +102,11 @@ snd_seq_oss_create_client(void) subs.dest.port = system_port; call_ctl(SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, &subs); } - rc = 0; /* look up midi devices */ schedule_work(&async_lookup_work); - __error: - kfree(port); - return rc; + return 0; } @@ -455,9 +450,9 @@ snd_seq_oss_reset(struct seq_oss_devinfo *dp) * misc. functions for proc interface */ char * -enabled_str(int bool) +enabled_str(bool b) { - return bool ? "enabled" : "disabled"; + return b ? "enabled" : "disabled"; } static const char * diff --git a/sound/core/seq/oss/seq_oss_midi.c b/sound/core/seq/oss/seq_oss_midi.c index f2940b2959..f8e247d9e5 100644 --- a/sound/core/seq/oss/seq_oss_midi.c +++ b/sound/core/seq/oss/seq_oss_midi.c @@ -64,16 +64,13 @@ static int send_midi_event(struct seq_oss_devinfo *dp, struct snd_seq_event *ev, int snd_seq_oss_midi_lookup_ports(int client) { - struct snd_seq_client_info *clinfo; - struct snd_seq_port_info *pinfo; + struct snd_seq_client_info *clinfo __free(kfree) = NULL; + struct snd_seq_port_info *pinfo __free(kfree) = NULL; clinfo = kzalloc(sizeof(*clinfo), GFP_KERNEL); pinfo = kzalloc(sizeof(*pinfo), GFP_KERNEL); - if (! clinfo || ! pinfo) { - kfree(clinfo); - kfree(pinfo); + if (!clinfo || !pinfo) return -ENOMEM; - } clinfo->client = -1; while (snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT, clinfo) == 0) { if (clinfo->client == client) @@ -83,8 +80,6 @@ snd_seq_oss_midi_lookup_ports(int client) while (snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, pinfo) == 0) snd_seq_oss_midi_check_new_port(pinfo); } - kfree(clinfo); - kfree(pinfo); return 0; } diff --git a/sound/core/seq/seq_compat.c b/sound/core/seq/seq_compat.c index 1e35bf086a..643af4c1e8 100644 --- a/sound/core/seq/seq_compat.c +++ b/sound/core/seq/seq_compat.c @@ -31,8 +31,8 @@ struct snd_seq_port_info32 { static int snd_seq_call_port_info_ioctl(struct snd_seq_client *client, unsigned int cmd, struct snd_seq_port_info32 __user *data32) { - int err = -EFAULT; - struct snd_seq_port_info *data; + struct snd_seq_port_info *data __free(kfree) = NULL; + int err; data = kmalloc(sizeof(*data), GFP_KERNEL); if (!data) @@ -41,20 +41,18 @@ static int snd_seq_call_port_info_ioctl(struct snd_seq_client *client, unsigned if (copy_from_user(data, data32, sizeof(*data32)) || get_user(data->flags, &data32->flags) || get_user(data->time_queue, &data32->time_queue)) - goto error; + return -EFAULT; data->kernel = NULL; err = snd_seq_kernel_client_ctl(client->number, cmd, data); if (err < 0) - goto error; + return err; if (copy_to_user(data32, data, sizeof(*data32)) || put_user(data->flags, &data32->flags) || put_user(data->time_queue, &data32->time_queue)) - err = -EFAULT; + return -EFAULT; - error: - kfree(data); return err; } diff --git a/sound/core/seq/seq_fifo.c b/sound/core/seq/seq_fifo.c index f8e02e9870..3a10b081f1 100644 --- a/sound/core/seq/seq_fifo.c +++ b/sound/core/seq/seq_fifo.c @@ -88,12 +88,11 @@ void snd_seq_fifo_clear(struct snd_seq_fifo *f) atomic_set(&f->overflow, 0); snd_use_lock_sync(&f->use_lock); - spin_lock_irq(&f->lock); + guard(spinlock_irq)(&f->lock); /* drain the fifo */ while ((cell = fifo_cell_out(f)) != NULL) { snd_seq_cell_free(cell); } - spin_unlock_irq(&f->lock); } @@ -102,7 +101,6 @@ int snd_seq_fifo_event_in(struct snd_seq_fifo *f, struct snd_seq_event *event) { struct snd_seq_event_cell *cell; - unsigned long flags; int err; if (snd_BUG_ON(!f)) @@ -118,15 +116,15 @@ int snd_seq_fifo_event_in(struct snd_seq_fifo *f, } /* append new cells to fifo */ - spin_lock_irqsave(&f->lock, flags); - if (f->tail != NULL) - f->tail->next = cell; - f->tail = cell; - if (f->head == NULL) - f->head = cell; - cell->next = NULL; - f->cells++; - spin_unlock_irqrestore(&f->lock, flags); + scoped_guard(spinlock_irqsave, &f->lock) { + if (f->tail != NULL) + f->tail->next = cell; + f->tail = cell; + if (f->head == NULL) + f->head = cell; + cell->next = NULL; + f->cells++; + } /* wakeup client */ if (waitqueue_active(&f->input_sleep)) @@ -199,16 +197,13 @@ int snd_seq_fifo_cell_out(struct snd_seq_fifo *f, void snd_seq_fifo_cell_putback(struct snd_seq_fifo *f, struct snd_seq_event_cell *cell) { - unsigned long flags; - if (cell) { - spin_lock_irqsave(&f->lock, flags); + guard(spinlock_irqsave)(&f->lock); cell->next = f->head; f->head = cell; if (!f->tail) f->tail = cell; f->cells++; - spin_unlock_irqrestore(&f->lock, flags); } } @@ -239,17 +234,17 @@ int snd_seq_fifo_resize(struct snd_seq_fifo *f, int poolsize) return -ENOMEM; } - spin_lock_irq(&f->lock); - /* remember old pool */ - oldpool = f->pool; - oldhead = f->head; - /* exchange pools */ - f->pool = newpool; - f->head = NULL; - f->tail = NULL; - f->cells = 0; - /* NOTE: overflow flag is not cleared */ - spin_unlock_irq(&f->lock); + scoped_guard(spinlock_irq, &f->lock) { + /* remember old pool */ + oldpool = f->pool; + oldhead = f->head; + /* exchange pools */ + f->pool = newpool; + f->head = NULL; + f->tail = NULL; + f->cells = 0; + /* NOTE: overflow flag is not cleared */ + } /* close the old pool and wait until all users are gone */ snd_seq_pool_mark_closing(oldpool); @@ -268,16 +263,14 @@ int snd_seq_fifo_resize(struct snd_seq_fifo *f, int poolsize) /* get the number of unused cells safely */ int snd_seq_fifo_unused_cells(struct snd_seq_fifo *f) { - unsigned long flags; int cells; if (!f) return 0; snd_use_lock_use(&f->use_lock); - spin_lock_irqsave(&f->lock, flags); - cells = snd_seq_unused_cells(f->pool); - spin_unlock_irqrestore(&f->lock, flags); + scoped_guard(spinlock_irqsave, &f->lock) + cells = snd_seq_unused_cells(f->pool); snd_use_lock_free(&f->use_lock); return cells; } diff --git a/sound/core/seq/seq_memory.c b/sound/core/seq/seq_memory.c index e705e75381..20155e3e87 100644 --- a/sound/core/seq/seq_memory.c +++ b/sound/core/seq/seq_memory.c @@ -232,7 +232,6 @@ static inline void free_cell(struct snd_seq_pool *pool, void snd_seq_cell_free(struct snd_seq_event_cell * cell) { - unsigned long flags; struct snd_seq_pool *pool; if (snd_BUG_ON(!cell)) @@ -241,7 +240,7 @@ void snd_seq_cell_free(struct snd_seq_event_cell * cell) if (snd_BUG_ON(!pool)) return; - spin_lock_irqsave(&pool->lock, flags); + guard(spinlock_irqsave)(&pool->lock); free_cell(pool, cell); if (snd_seq_ev_is_variable(&cell->event)) { if (cell->event.data.ext.len & SNDRV_SEQ_EXT_CHAINED) { @@ -259,7 +258,6 @@ void snd_seq_cell_free(struct snd_seq_event_cell * cell) if (snd_seq_output_ok(pool)) wake_up(&pool->output_sleep); } - spin_unlock_irqrestore(&pool->lock, flags); } @@ -449,9 +447,8 @@ int snd_seq_pool_init(struct snd_seq_pool *pool) return -ENOMEM; /* add new cells to the free cell list */ - spin_lock_irq(&pool->lock); + guard(spinlock_irq)(&pool->lock); if (pool->ptr) { - spin_unlock_irq(&pool->lock); kvfree(cellptr); return 0; } @@ -470,20 +467,16 @@ int snd_seq_pool_init(struct snd_seq_pool *pool) /* init statistics */ pool->max_used = 0; pool->total_elements = pool->size; - spin_unlock_irq(&pool->lock); return 0; } /* refuse the further insertion to the pool */ void snd_seq_pool_mark_closing(struct snd_seq_pool *pool) { - unsigned long flags; - if (snd_BUG_ON(!pool)) return; - spin_lock_irqsave(&pool->lock, flags); + guard(spinlock_irqsave)(&pool->lock); pool->closing = 1; - spin_unlock_irqrestore(&pool->lock, flags); } /* remove events */ @@ -502,18 +495,17 @@ int snd_seq_pool_done(struct snd_seq_pool *pool) schedule_timeout_uninterruptible(1); /* release all resources */ - spin_lock_irq(&pool->lock); - ptr = pool->ptr; - pool->ptr = NULL; - pool->free = NULL; - pool->total_elements = 0; - spin_unlock_irq(&pool->lock); + scoped_guard(spinlock_irq, &pool->lock) { + ptr = pool->ptr; + pool->ptr = NULL; + pool->free = NULL; + pool->total_elements = 0; + } kvfree(ptr); - spin_lock_irq(&pool->lock); + guard(spinlock_irq)(&pool->lock); pool->closing = 0; - spin_unlock_irq(&pool->lock); return 0; } diff --git a/sound/core/seq/seq_midi.c b/sound/core/seq/seq_midi.c index 78dcb0ea15..ba52a77eda 100644 --- a/sound/core/seq/seq_midi.c +++ b/sound/core/seq/seq_midi.c @@ -270,8 +270,8 @@ snd_seq_midisynth_probe(struct device *_dev) struct snd_seq_device *dev = to_seq_dev(_dev); struct seq_midisynth_client *client; struct seq_midisynth *msynth, *ms; - struct snd_seq_port_info *port; - struct snd_rawmidi_info *info; + struct snd_seq_port_info *port __free(kfree) = NULL; + struct snd_rawmidi_info *info __free(kfree) = NULL; struct snd_rawmidi *rmidi = dev->private_data; int newclient = 0; unsigned int p, ports; @@ -297,31 +297,24 @@ snd_seq_midisynth_probe(struct device *_dev) ports = output_count; if (ports < input_count) ports = input_count; - if (ports == 0) { - kfree(info); + if (ports == 0) return -ENODEV; - } if (ports > (256 / SNDRV_RAWMIDI_DEVICES)) ports = 256 / SNDRV_RAWMIDI_DEVICES; - mutex_lock(®ister_mutex); + guard(mutex)(®ister_mutex); client = synths[card->number]; if (client == NULL) { newclient = 1; client = kzalloc(sizeof(*client), GFP_KERNEL); - if (client == NULL) { - mutex_unlock(®ister_mutex); - kfree(info); + if (client == NULL) return -ENOMEM; - } client->seq_client = snd_seq_create_kernel_client( card, 0, "%s", card->shortname[0] ? (const char *)card->shortname : "External MIDI"); if (client->seq_client < 0) { kfree(client); - mutex_unlock(®ister_mutex); - kfree(info); return -ENOMEM; } } @@ -402,9 +395,6 @@ snd_seq_midisynth_probe(struct device *_dev) client->num_ports++; if (newclient) synths[card->number] = client; - mutex_unlock(®ister_mutex); - kfree(info); - kfree(port); return 0; /* success */ __nomem: @@ -417,9 +407,6 @@ snd_seq_midisynth_probe(struct device *_dev) snd_seq_delete_kernel_client(client->seq_client); kfree(client); } - kfree(info); - kfree(port); - mutex_unlock(®ister_mutex); return -ENOMEM; } @@ -433,12 +420,10 @@ snd_seq_midisynth_remove(struct device *_dev) struct snd_card *card = dev->card; int device = dev->device, p, ports; - mutex_lock(®ister_mutex); + guard(mutex)(®ister_mutex); client = synths[card->number]; - if (client == NULL || client->ports[device] == NULL) { - mutex_unlock(®ister_mutex); + if (client == NULL || client->ports[device] == NULL) return -ENODEV; - } ports = client->ports_per_device[device]; client->ports_per_device[device] = 0; msynth = client->ports[device]; @@ -452,7 +437,6 @@ snd_seq_midisynth_remove(struct device *_dev) synths[card->number] = NULL; kfree(client); } - mutex_unlock(®ister_mutex); return 0; } diff --git a/sound/core/seq/seq_midi_event.c b/sound/core/seq/seq_midi_event.c index 7511462fe0..fa9dfc53c3 100644 --- a/sound/core/seq/seq_midi_event.c +++ b/sound/core/seq/seq_midi_event.c @@ -144,21 +144,15 @@ static inline void reset_encode(struct snd_midi_event *dev) void snd_midi_event_reset_encode(struct snd_midi_event *dev) { - unsigned long flags; - - spin_lock_irqsave(&dev->lock, flags); + guard(spinlock_irqsave)(&dev->lock); reset_encode(dev); - spin_unlock_irqrestore(&dev->lock, flags); } EXPORT_SYMBOL(snd_midi_event_reset_encode); void snd_midi_event_reset_decode(struct snd_midi_event *dev) { - unsigned long flags; - - spin_lock_irqsave(&dev->lock, flags); + guard(spinlock_irqsave)(&dev->lock); dev->lastcmd = 0xff; - spin_unlock_irqrestore(&dev->lock, flags); } EXPORT_SYMBOL(snd_midi_event_reset_decode); @@ -177,7 +171,6 @@ bool snd_midi_event_encode_byte(struct snd_midi_event *dev, unsigned char c, struct snd_seq_event *ev) { bool rc = false; - unsigned long flags; if (c >= MIDI_CMD_COMMON_CLOCK) { /* real-time event */ @@ -187,7 +180,7 @@ bool snd_midi_event_encode_byte(struct snd_midi_event *dev, unsigned char c, return ev->type != SNDRV_SEQ_EVENT_NONE; } - spin_lock_irqsave(&dev->lock, flags); + guard(spinlock_irqsave)(&dev->lock); if ((c & 0x80) && (c != MIDI_CMD_COMMON_SYSEX_END || dev->type != ST_SYSEX)) { /* new command */ @@ -236,7 +229,6 @@ bool snd_midi_event_encode_byte(struct snd_midi_event *dev, unsigned char c, } } - spin_unlock_irqrestore(&dev->lock, flags); return rc; } EXPORT_SYMBOL(snd_midi_event_encode_byte); diff --git a/sound/core/seq/seq_ports.c b/sound/core/seq/seq_ports.c index f3f14ff0f8..ca631ca4f2 100644 --- a/sound/core/seq/seq_ports.c +++ b/sound/core/seq/seq_ports.c @@ -48,17 +48,15 @@ struct snd_seq_client_port *snd_seq_port_use_ptr(struct snd_seq_client *client, if (client == NULL) return NULL; - read_lock(&client->ports_lock); + guard(read_lock)(&client->ports_lock); list_for_each_entry(port, &client->ports_list_head, list) { if (port->addr.port == num) { if (port->closing) break; /* deleting now */ snd_use_lock_use(&port->use_lock); - read_unlock(&client->ports_lock); return port; } } - read_unlock(&client->ports_lock); return NULL; /* not found */ } @@ -73,7 +71,7 @@ struct snd_seq_client_port *snd_seq_port_query_nearest(struct snd_seq_client *cl num = pinfo->addr.port; found = NULL; - read_lock(&client->ports_lock); + guard(read_lock)(&client->ports_lock); list_for_each_entry(port, &client->ports_list_head, list) { if ((port->capability & SNDRV_SEQ_PORT_CAP_INACTIVE) && !check_inactive) @@ -93,7 +91,6 @@ struct snd_seq_client_port *snd_seq_port_query_nearest(struct snd_seq_client *cl else snd_use_lock_use(&found->use_lock); } - read_unlock(&client->ports_lock); return found; } @@ -145,13 +142,12 @@ int snd_seq_create_port(struct snd_seq_client *client, int port, snd_use_lock_use(&new_port->use_lock); num = max(port, 0); - mutex_lock(&client->ports_mutex); - write_lock_irq(&client->ports_lock); + guard(mutex)(&client->ports_mutex); + guard(write_lock_irq)(&client->ports_lock); list_for_each_entry(p, &client->ports_list_head, list) { if (p->addr.port == port) { kfree(new_port); - num = -EBUSY; - goto unlock; + return -EBUSY; } if (p->addr.port > num) break; @@ -164,9 +160,6 @@ int snd_seq_create_port(struct snd_seq_client *client, int port, new_port->addr.port = num; /* store the port number in the port */ sprintf(new_port->name, "port-%d", num); *port_ret = new_port; - unlock: - write_unlock_irq(&client->ports_lock); - mutex_unlock(&client->ports_mutex); return num; } @@ -281,19 +274,18 @@ int snd_seq_delete_port(struct snd_seq_client *client, int port) { struct snd_seq_client_port *found = NULL, *p; - mutex_lock(&client->ports_mutex); - write_lock_irq(&client->ports_lock); - list_for_each_entry(p, &client->ports_list_head, list) { - if (p->addr.port == port) { - /* ok found. delete from the list at first */ - list_del(&p->list); - client->num_ports--; - found = p; - break; + scoped_guard(mutex, &client->ports_mutex) { + guard(write_lock_irq)(&client->ports_lock); + list_for_each_entry(p, &client->ports_list_head, list) { + if (p->addr.port == port) { + /* ok found. delete from the list at first */ + list_del(&p->list); + client->num_ports--; + found = p; + break; + } } } - write_unlock_irq(&client->ports_lock); - mutex_unlock(&client->ports_mutex); if (found) return port_delete(client, found); else @@ -309,16 +301,16 @@ int snd_seq_delete_all_ports(struct snd_seq_client *client) /* move the port list to deleted_list, and * clear the port list in the client data. */ - mutex_lock(&client->ports_mutex); - write_lock_irq(&client->ports_lock); - if (! list_empty(&client->ports_list_head)) { - list_add(&deleted_list, &client->ports_list_head); - list_del_init(&client->ports_list_head); - } else { - INIT_LIST_HEAD(&deleted_list); + guard(mutex)(&client->ports_mutex); + scoped_guard(write_lock_irq, &client->ports_lock) { + if (!list_empty(&client->ports_list_head)) { + list_add(&deleted_list, &client->ports_list_head); + list_del_init(&client->ports_list_head); + } else { + INIT_LIST_HEAD(&deleted_list); + } + client->num_ports = 0; } - client->num_ports = 0; - write_unlock_irq(&client->ports_lock); /* remove each port in deleted_list */ list_for_each_entry_safe(port, tmp, &deleted_list, list) { @@ -326,7 +318,6 @@ int snd_seq_delete_all_ports(struct snd_seq_client *client) snd_seq_system_client_ev_port_exit(port->addr.client, port->addr.port); port_delete(client, port); } - mutex_unlock(&client->ports_mutex); return 0; } @@ -506,42 +497,37 @@ static int check_and_subscribe_port(struct snd_seq_client *client, int err; grp = is_src ? &port->c_src : &port->c_dest; - err = -EBUSY; - down_write(&grp->list_mutex); + guard(rwsem_write)(&grp->list_mutex); if (exclusive) { if (!list_empty(&grp->list_head)) - goto __error; + return -EBUSY; } else { if (grp->exclusive) - goto __error; + return -EBUSY; /* check whether already exists */ list_for_each(p, &grp->list_head) { s = get_subscriber(p, is_src); if (match_subs_info(&subs->info, &s->info)) - goto __error; + return -EBUSY; } } err = subscribe_port(client, port, grp, &subs->info, ack); if (err < 0) { grp->exclusive = 0; - goto __error; + return err; } /* add to list */ - write_lock_irq(&grp->list_lock); + guard(write_lock_irq)(&grp->list_lock); if (is_src) list_add_tail(&subs->src_list, &grp->list_head); else list_add_tail(&subs->dest_list, &grp->list_head); grp->exclusive = exclusive; atomic_inc(&subs->ref_count); - write_unlock_irq(&grp->list_lock); - err = 0; - __error: - up_write(&grp->list_mutex); - return err; + return 0; } /* called with grp->list_mutex held */ @@ -556,12 +542,12 @@ static void __delete_and_unsubscribe_port(struct snd_seq_client *client, grp = is_src ? &port->c_src : &port->c_dest; list = is_src ? &subs->src_list : &subs->dest_list; - write_lock_irq(&grp->list_lock); - empty = list_empty(list); - if (!empty) - list_del_init(list); - grp->exclusive = 0; - write_unlock_irq(&grp->list_lock); + scoped_guard(write_lock_irq, &grp->list_lock) { + empty = list_empty(list); + if (!empty) + list_del_init(list); + grp->exclusive = 0; + } if (!empty) unsubscribe_port(client, port, grp, &subs->info, ack); @@ -575,9 +561,8 @@ static void delete_and_unsubscribe_port(struct snd_seq_client *client, struct snd_seq_port_subs_info *grp; grp = is_src ? &port->c_src : &port->c_dest; - down_write(&grp->list_mutex); + guard(rwsem_write)(&grp->list_mutex); __delete_and_unsubscribe_port(client, port, subs, is_src, ack); - up_write(&grp->list_mutex); } /* connect two ports */ @@ -639,18 +624,18 @@ int snd_seq_port_disconnect(struct snd_seq_client *connector, /* always start from deleting the dest port for avoiding concurrent * deletions */ - down_write(&dest->list_mutex); - /* look for the connection */ - list_for_each_entry(subs, &dest->list_head, dest_list) { - if (match_subs_info(info, &subs->info)) { - __delete_and_unsubscribe_port(dest_client, dest_port, - subs, false, - connector->number != dest_client->number); - err = 0; - break; + scoped_guard(rwsem_write, &dest->list_mutex) { + /* look for the connection */ + list_for_each_entry(subs, &dest->list_head, dest_list) { + if (match_subs_info(info, &subs->info)) { + __delete_and_unsubscribe_port(dest_client, dest_port, + subs, false, + connector->number != dest_client->number); + err = 0; + break; + } } } - up_write(&dest->list_mutex); if (err < 0) return err; @@ -669,7 +654,7 @@ int snd_seq_port_get_subscription(struct snd_seq_port_subs_info *src_grp, struct snd_seq_subscribers *s; int err = -ENOENT; - down_read(&src_grp->list_mutex); + guard(rwsem_read)(&src_grp->list_mutex); list_for_each_entry(s, &src_grp->list_head, src_list) { if (addr_match(dest_addr, &s->info.dest)) { *subs = s->info; @@ -677,7 +662,6 @@ int snd_seq_port_get_subscription(struct snd_seq_port_subs_info *src_grp, break; } } - up_read(&src_grp->list_mutex); return err; } diff --git a/sound/core/seq/seq_prioq.c b/sound/core/seq/seq_prioq.c index 1d857981e8..e649485a87 100644 --- a/sound/core/seq/seq_prioq.c +++ b/sound/core/seq/seq_prioq.c @@ -132,7 +132,6 @@ int snd_seq_prioq_cell_in(struct snd_seq_prioq * f, struct snd_seq_event_cell * cell) { struct snd_seq_event_cell *cur, *prev; - unsigned long flags; int count; int prior; @@ -142,7 +141,7 @@ int snd_seq_prioq_cell_in(struct snd_seq_prioq * f, /* check flags */ prior = (cell->event.flags & SNDRV_SEQ_PRIORITY_MASK); - spin_lock_irqsave(&f->lock, flags); + guard(spinlock_irqsave)(&f->lock); /* check if this element needs to inserted at the end (ie. ordered data is inserted) This will be very likeley if a sequencer @@ -154,7 +153,6 @@ int snd_seq_prioq_cell_in(struct snd_seq_prioq * f, f->tail = cell; cell->next = NULL; f->cells++; - spin_unlock_irqrestore(&f->lock, flags); return 0; } } @@ -179,7 +177,6 @@ int snd_seq_prioq_cell_in(struct snd_seq_prioq * f, prev = cur; cur = cur->next; if (! --count) { - spin_unlock_irqrestore(&f->lock, flags); pr_err("ALSA: seq: cannot find a pointer.. infinite loop?\n"); return -EINVAL; } @@ -195,7 +192,6 @@ int snd_seq_prioq_cell_in(struct snd_seq_prioq * f, if (cur == NULL) /* reached end of the list */ f->tail = cell; f->cells++; - spin_unlock_irqrestore(&f->lock, flags); return 0; } @@ -213,14 +209,13 @@ struct snd_seq_event_cell *snd_seq_prioq_cell_out(struct snd_seq_prioq *f, void *current_time) { struct snd_seq_event_cell *cell; - unsigned long flags; if (f == NULL) { pr_debug("ALSA: seq: snd_seq_prioq_cell_in() called with NULL prioq\n"); return NULL; } - spin_lock_irqsave(&f->lock, flags); + guard(spinlock_irqsave)(&f->lock); cell = f->head; if (cell && current_time && !event_is_ready(&cell->event, current_time)) cell = NULL; @@ -235,7 +230,6 @@ struct snd_seq_event_cell *snd_seq_prioq_cell_out(struct snd_seq_prioq *f, f->cells--; } - spin_unlock_irqrestore(&f->lock, flags); return cell; } @@ -249,73 +243,43 @@ int snd_seq_prioq_avail(struct snd_seq_prioq * f) return f->cells; } -static inline int prioq_match(struct snd_seq_event_cell *cell, - int client, int timestamp) -{ - if (cell->event.source.client == client || - cell->event.dest.client == client) - return 1; - if (!timestamp) - return 0; - switch (cell->event.flags & SNDRV_SEQ_TIME_STAMP_MASK) { - case SNDRV_SEQ_TIME_STAMP_TICK: - if (cell->event.time.tick) - return 1; - break; - case SNDRV_SEQ_TIME_STAMP_REAL: - if (cell->event.time.time.tv_sec || - cell->event.time.time.tv_nsec) - return 1; - break; - } - return 0; -} - -/* remove cells for left client */ -void snd_seq_prioq_leave(struct snd_seq_prioq * f, int client, int timestamp) +/* remove cells matching with the condition */ +static void prioq_remove_cells(struct snd_seq_prioq *f, + bool (*match)(struct snd_seq_event_cell *cell, + void *arg), + void *arg) { register struct snd_seq_event_cell *cell, *next; - unsigned long flags; struct snd_seq_event_cell *prev = NULL; struct snd_seq_event_cell *freefirst = NULL, *freeprev = NULL, *freenext; /* collect all removed cells */ - spin_lock_irqsave(&f->lock, flags); - cell = f->head; - while (cell) { - next = cell->next; - if (prioq_match(cell, client, timestamp)) { + scoped_guard(spinlock_irqsave, &f->lock) { + for (cell = f->head; cell; cell = next) { + next = cell->next; + if (!match(cell, arg)) { + prev = cell; + continue; + } + /* remove cell from prioq */ - if (cell == f->head) { + if (cell == f->head) f->head = cell->next; - } else { + else prev->next = cell->next; - } if (cell == f->tail) f->tail = cell->next; f->cells--; + /* add cell to free list */ cell->next = NULL; - if (freefirst == NULL) { + if (freefirst == NULL) freefirst = cell; - } else { + else freeprev->next = cell; - } freeprev = cell; - } else { -#if 0 - pr_debug("ALSA: seq: type = %i, source = %i, dest = %i, " - "client = %i\n", - cell->event.type, - cell->event.source.client, - cell->event.dest.client, - client); -#endif - prev = cell; } - cell = next; } - spin_unlock_irqrestore(&f->lock, flags); /* remove selected cells */ while (freefirst) { @@ -325,22 +289,68 @@ void snd_seq_prioq_leave(struct snd_seq_prioq * f, int client, int timestamp) } } -static int prioq_remove_match(struct snd_seq_remove_events *info, - struct snd_seq_event *ev) +struct prioq_match_arg { + int client; + int timestamp; +}; + +static inline bool prioq_match(struct snd_seq_event_cell *cell, void *arg) +{ + struct prioq_match_arg *v = arg; + + if (cell->event.source.client == v->client || + cell->event.dest.client == v->client) + return true; + if (!v->timestamp) + return false; + switch (cell->event.flags & SNDRV_SEQ_TIME_STAMP_MASK) { + case SNDRV_SEQ_TIME_STAMP_TICK: + if (cell->event.time.tick) + return true; + break; + case SNDRV_SEQ_TIME_STAMP_REAL: + if (cell->event.time.time.tv_sec || + cell->event.time.time.tv_nsec) + return true; + break; + } + return false; +} + +/* remove cells for left client */ +void snd_seq_prioq_leave(struct snd_seq_prioq *f, int client, int timestamp) { + struct prioq_match_arg arg = { client, timestamp }; + + return prioq_remove_cells(f, prioq_match, &arg); +} + +struct prioq_remove_match_arg { + int client; + struct snd_seq_remove_events *info; +}; + +static bool prioq_remove_match(struct snd_seq_event_cell *cell, void *arg) +{ + struct prioq_remove_match_arg *v = arg; + struct snd_seq_event *ev = &cell->event; + struct snd_seq_remove_events *info = v->info; int res; + if (ev->source.client != v->client) + return false; + if (info->remove_mode & SNDRV_SEQ_REMOVE_DEST) { if (ev->dest.client != info->dest.client || ev->dest.port != info->dest.port) - return 0; + return false; } if (info->remove_mode & SNDRV_SEQ_REMOVE_DEST_CHANNEL) { if (! snd_seq_ev_is_channel_type(ev)) - return 0; + return false; /* data.note.channel and data.control.channel are identical */ if (ev->data.note.channel != info->channel) - return 0; + return false; } if (info->remove_mode & SNDRV_SEQ_REMOVE_TIME_AFTER) { if (info->remove_mode & SNDRV_SEQ_REMOVE_TIME_TICK) @@ -348,7 +358,7 @@ static int prioq_remove_match(struct snd_seq_remove_events *info, else res = snd_seq_compare_real_time(&ev->time.time, &info->time.time); if (!res) - return 0; + return false; } if (info->remove_mode & SNDRV_SEQ_REMOVE_TIME_BEFORE) { if (info->remove_mode & SNDRV_SEQ_REMOVE_TIME_TICK) @@ -356,81 +366,35 @@ static int prioq_remove_match(struct snd_seq_remove_events *info, else res = snd_seq_compare_real_time(&ev->time.time, &info->time.time); if (res) - return 0; + return false; } if (info->remove_mode & SNDRV_SEQ_REMOVE_EVENT_TYPE) { if (ev->type != info->type) - return 0; + return false; } if (info->remove_mode & SNDRV_SEQ_REMOVE_IGNORE_OFF) { /* Do not remove off events */ switch (ev->type) { case SNDRV_SEQ_EVENT_NOTEOFF: /* case SNDRV_SEQ_EVENT_SAMPLE_STOP: */ - return 0; + return false; default: break; } } if (info->remove_mode & SNDRV_SEQ_REMOVE_TAG_MATCH) { if (info->tag != ev->tag) - return 0; + return false; } - return 1; + return true; } /* remove cells matching remove criteria */ void snd_seq_prioq_remove_events(struct snd_seq_prioq * f, int client, struct snd_seq_remove_events *info) { - struct snd_seq_event_cell *cell, *next; - unsigned long flags; - struct snd_seq_event_cell *prev = NULL; - struct snd_seq_event_cell *freefirst = NULL, *freeprev = NULL, *freenext; - - /* collect all removed cells */ - spin_lock_irqsave(&f->lock, flags); - cell = f->head; - - while (cell) { - next = cell->next; - if (cell->event.source.client == client && - prioq_remove_match(info, &cell->event)) { + struct prioq_remove_match_arg arg = { client, info }; - /* remove cell from prioq */ - if (cell == f->head) { - f->head = cell->next; - } else { - prev->next = cell->next; - } - - if (cell == f->tail) - f->tail = cell->next; - f->cells--; - - /* add cell to free list */ - cell->next = NULL; - if (freefirst == NULL) { - freefirst = cell; - } else { - freeprev->next = cell; - } - - freeprev = cell; - } else { - prev = cell; - } - cell = next; - } - spin_unlock_irqrestore(&f->lock, flags); - - /* remove selected cells */ - while (freefirst) { - freenext = freefirst->next; - snd_seq_cell_free(freefirst); - freefirst = freenext; - } + return prioq_remove_cells(f, prioq_remove_match, &arg); } - - diff --git a/sound/core/seq/seq_queue.c b/sound/core/seq/seq_queue.c index bc933104c3..500ee6b19c 100644 --- a/sound/core/seq/seq_queue.c +++ b/sound/core/seq/seq_queue.c @@ -50,43 +50,35 @@ int snd_seq_queue_get_cur_queues(void) static int queue_list_add(struct snd_seq_queue *q) { int i; - unsigned long flags; - spin_lock_irqsave(&queue_list_lock, flags); + guard(spinlock_irqsave)(&queue_list_lock); for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) { if (! queue_list[i]) { queue_list[i] = q; q->queue = i; num_queues++; - spin_unlock_irqrestore(&queue_list_lock, flags); return i; } } - spin_unlock_irqrestore(&queue_list_lock, flags); return -1; } static struct snd_seq_queue *queue_list_remove(int id, int client) { struct snd_seq_queue *q; - unsigned long flags; - spin_lock_irqsave(&queue_list_lock, flags); + guard(spinlock_irqsave)(&queue_list_lock); q = queue_list[id]; if (q) { - spin_lock(&q->owner_lock); + guard(spinlock)(&q->owner_lock); if (q->owner == client) { /* found */ q->klocked = 1; - spin_unlock(&q->owner_lock); queue_list[id] = NULL; num_queues--; - spin_unlock_irqrestore(&queue_list_lock, flags); return q; } - spin_unlock(&q->owner_lock); } - spin_unlock_irqrestore(&queue_list_lock, flags); return NULL; } @@ -203,15 +195,13 @@ int snd_seq_queue_delete(int client, int queueid) struct snd_seq_queue *queueptr(int queueid) { struct snd_seq_queue *q; - unsigned long flags; if (queueid < 0 || queueid >= SNDRV_SEQ_MAX_QUEUES) return NULL; - spin_lock_irqsave(&queue_list_lock, flags); + guard(spinlock_irqsave)(&queue_list_lock); q = queue_list[queueid]; if (q) snd_use_lock_use(&q->use_lock); - spin_unlock_irqrestore(&queue_list_lock, flags); return q; } @@ -239,7 +229,6 @@ struct snd_seq_queue *snd_seq_queue_find_name(char *name) void snd_seq_check_queue(struct snd_seq_queue *q, int atomic, int hop) { - unsigned long flags; struct snd_seq_event_cell *cell; snd_seq_tick_time_t cur_tick; snd_seq_real_time_t cur_time; @@ -249,14 +238,13 @@ void snd_seq_check_queue(struct snd_seq_queue *q, int atomic, int hop) return; /* make this function non-reentrant */ - spin_lock_irqsave(&q->check_lock, flags); - if (q->check_blocked) { - q->check_again = 1; - spin_unlock_irqrestore(&q->check_lock, flags); - return; /* other thread is already checking queues */ + scoped_guard(spinlock_irqsave, &q->check_lock) { + if (q->check_blocked) { + q->check_again = 1; + return; /* other thread is already checking queues */ + } + q->check_blocked = 1; } - q->check_blocked = 1; - spin_unlock_irqrestore(&q->check_lock, flags); __again: /* Process tick queue... */ @@ -283,16 +271,14 @@ void snd_seq_check_queue(struct snd_seq_queue *q, int atomic, int hop) out: /* free lock */ - spin_lock_irqsave(&q->check_lock, flags); - if (q->check_again) { - q->check_again = 0; - if (processed < MAX_CELL_PROCESSES_IN_QUEUE) { - spin_unlock_irqrestore(&q->check_lock, flags); - goto __again; + scoped_guard(spinlock_irqsave, &q->check_lock) { + if (q->check_again) { + q->check_again = 0; + if (processed < MAX_CELL_PROCESSES_IN_QUEUE) + goto __again; } + q->check_blocked = 0; } - q->check_blocked = 0; - spin_unlock_irqrestore(&q->check_lock, flags); } @@ -361,25 +347,20 @@ static inline int check_access(struct snd_seq_queue *q, int client) */ static int queue_access_lock(struct snd_seq_queue *q, int client) { - unsigned long flags; int access_ok; - spin_lock_irqsave(&q->owner_lock, flags); + guard(spinlock_irqsave)(&q->owner_lock); access_ok = check_access(q, client); if (access_ok) q->klocked = 1; - spin_unlock_irqrestore(&q->owner_lock, flags); return access_ok; } /* unlock the queue */ static inline void queue_access_unlock(struct snd_seq_queue *q) { - unsigned long flags; - - spin_lock_irqsave(&q->owner_lock, flags); + guard(spinlock_irqsave)(&q->owner_lock); q->klocked = 0; - spin_unlock_irqrestore(&q->owner_lock, flags); } /* exported - only checking permission */ @@ -387,13 +368,11 @@ int snd_seq_queue_check_access(int queueid, int client) { struct snd_seq_queue *q = queueptr(queueid); int access_ok; - unsigned long flags; if (! q) return 0; - spin_lock_irqsave(&q->owner_lock, flags); - access_ok = check_access(q, client); - spin_unlock_irqrestore(&q->owner_lock, flags); + scoped_guard(spinlock_irqsave, &q->owner_lock) + access_ok = check_access(q, client); queuefree(q); return access_ok; } @@ -406,7 +385,6 @@ int snd_seq_queue_check_access(int queueid, int client) int snd_seq_queue_set_owner(int queueid, int client, int locked) { struct snd_seq_queue *q = queueptr(queueid); - unsigned long flags; if (q == NULL) return -EINVAL; @@ -416,10 +394,10 @@ int snd_seq_queue_set_owner(int queueid, int client, int locked) return -EPERM; } - spin_lock_irqsave(&q->owner_lock, flags); - q->locked = locked ? 1 : 0; - q->owner = client; - spin_unlock_irqrestore(&q->owner_lock, flags); + scoped_guard(spinlock_irqsave, &q->owner_lock) { + q->locked = locked ? 1 : 0; + q->owner = client; + } queue_access_unlock(q); queuefree(q); @@ -750,10 +728,10 @@ void snd_seq_info_queues_read(struct snd_info_entry *entry, else bpm = 0; - spin_lock_irq(&q->owner_lock); - locked = q->locked; - owner = q->owner; - spin_unlock_irq(&q->owner_lock); + scoped_guard(spinlock_irq, &q->owner_lock) { + locked = q->locked; + owner = q->owner; + } snd_iprintf(buffer, "queue %d: [%s]\n", q->queue, q->name); snd_iprintf(buffer, "owned by client : %d\n", owner); diff --git a/sound/core/seq/seq_timer.c b/sound/core/seq/seq_timer.c index 9863be6fd4..ad2b97e276 100644 --- a/sound/core/seq/seq_timer.c +++ b/sound/core/seq/seq_timer.c @@ -75,9 +75,7 @@ void snd_seq_timer_delete(struct snd_seq_timer **tmr) void snd_seq_timer_defaults(struct snd_seq_timer * tmr) { - unsigned long flags; - - spin_lock_irqsave(&tmr->lock, flags); + guard(spinlock_irqsave)(&tmr->lock); /* setup defaults */ tmr->ppq = 96; /* 96 PPQ */ tmr->tempo = 500000; /* 120 BPM */ @@ -93,7 +91,6 @@ void snd_seq_timer_defaults(struct snd_seq_timer * tmr) tmr->preferred_resolution = seq_default_timer_resolution; tmr->skew = tmr->skew_base = SKEW_BASE; - spin_unlock_irqrestore(&tmr->lock, flags); } static void seq_timer_reset(struct snd_seq_timer *tmr) @@ -108,11 +105,8 @@ static void seq_timer_reset(struct snd_seq_timer *tmr) void snd_seq_timer_reset(struct snd_seq_timer *tmr) { - unsigned long flags; - - spin_lock_irqsave(&tmr->lock, flags); + guard(spinlock_irqsave)(&tmr->lock); seq_timer_reset(tmr); - spin_unlock_irqrestore(&tmr->lock, flags); } @@ -121,7 +115,6 @@ static void snd_seq_timer_interrupt(struct snd_timer_instance *timeri, unsigned long resolution, unsigned long ticks) { - unsigned long flags; struct snd_seq_queue *q = timeri->callback_data; struct snd_seq_timer *tmr; @@ -130,29 +123,27 @@ static void snd_seq_timer_interrupt(struct snd_timer_instance *timeri, tmr = q->timer; if (tmr == NULL) return; - spin_lock_irqsave(&tmr->lock, flags); - if (!tmr->running) { - spin_unlock_irqrestore(&tmr->lock, flags); - return; - } - resolution *= ticks; - if (tmr->skew != tmr->skew_base) { - /* FIXME: assuming skew_base = 0x10000 */ - resolution = (resolution >> 16) * tmr->skew + - (((resolution & 0xffff) * tmr->skew) >> 16); - } + scoped_guard(spinlock_irqsave, &tmr->lock) { + if (!tmr->running) + return; - /* update timer */ - snd_seq_inc_time_nsec(&tmr->cur_time, resolution); + resolution *= ticks; + if (tmr->skew != tmr->skew_base) { + /* FIXME: assuming skew_base = 0x10000 */ + resolution = (resolution >> 16) * tmr->skew + + (((resolution & 0xffff) * tmr->skew) >> 16); + } - /* calculate current tick */ - snd_seq_timer_update_tick(&tmr->tick, resolution); + /* update timer */ + snd_seq_inc_time_nsec(&tmr->cur_time, resolution); - /* register actual time of this timer update */ - ktime_get_ts64(&tmr->last_update); + /* calculate current tick */ + snd_seq_timer_update_tick(&tmr->tick, resolution); - spin_unlock_irqrestore(&tmr->lock, flags); + /* register actual time of this timer update */ + ktime_get_ts64(&tmr->last_update); + } /* check queues and dispatch events */ snd_seq_check_queue(q, 1, 0); @@ -161,18 +152,15 @@ static void snd_seq_timer_interrupt(struct snd_timer_instance *timeri, /* set current tempo */ int snd_seq_timer_set_tempo(struct snd_seq_timer * tmr, int tempo) { - unsigned long flags; - if (snd_BUG_ON(!tmr)) return -EINVAL; if (tempo <= 0) return -EINVAL; - spin_lock_irqsave(&tmr->lock, flags); + guard(spinlock_irqsave)(&tmr->lock); if ((unsigned int)tempo != tmr->tempo) { tmr->tempo = tempo; snd_seq_timer_set_tick_resolution(tmr); } - spin_unlock_irqrestore(&tmr->lock, flags); return 0; } @@ -180,17 +168,15 @@ int snd_seq_timer_set_tempo(struct snd_seq_timer * tmr, int tempo) int snd_seq_timer_set_tempo_ppq(struct snd_seq_timer *tmr, int tempo, int ppq) { int changed; - unsigned long flags; if (snd_BUG_ON(!tmr)) return -EINVAL; if (tempo <= 0 || ppq <= 0) return -EINVAL; - spin_lock_irqsave(&tmr->lock, flags); + guard(spinlock_irqsave)(&tmr->lock); if (tmr->running && (ppq != tmr->ppq)) { /* refuse to change ppq on running timers */ /* because it will upset the song position (ticks) */ - spin_unlock_irqrestore(&tmr->lock, flags); pr_debug("ALSA: seq: cannot change ppq of a running timer\n"); return -EBUSY; } @@ -199,7 +185,6 @@ int snd_seq_timer_set_tempo_ppq(struct snd_seq_timer *tmr, int tempo, int ppq) tmr->ppq = ppq; if (changed) snd_seq_timer_set_tick_resolution(tmr); - spin_unlock_irqrestore(&tmr->lock, flags); return 0; } @@ -207,15 +192,12 @@ int snd_seq_timer_set_tempo_ppq(struct snd_seq_timer *tmr, int tempo, int ppq) int snd_seq_timer_set_position_tick(struct snd_seq_timer *tmr, snd_seq_tick_time_t position) { - unsigned long flags; - if (snd_BUG_ON(!tmr)) return -EINVAL; - spin_lock_irqsave(&tmr->lock, flags); + guard(spinlock_irqsave)(&tmr->lock); tmr->tick.cur_tick = position; tmr->tick.fraction = 0; - spin_unlock_irqrestore(&tmr->lock, flags); return 0; } @@ -223,15 +205,12 @@ int snd_seq_timer_set_position_tick(struct snd_seq_timer *tmr, int snd_seq_timer_set_position_time(struct snd_seq_timer *tmr, snd_seq_real_time_t position) { - unsigned long flags; - if (snd_BUG_ON(!tmr)) return -EINVAL; snd_seq_sanity_real_time(&position); - spin_lock_irqsave(&tmr->lock, flags); + guard(spinlock_irqsave)(&tmr->lock); tmr->cur_time = position; - spin_unlock_irqrestore(&tmr->lock, flags); return 0; } @@ -239,8 +218,6 @@ int snd_seq_timer_set_position_time(struct snd_seq_timer *tmr, int snd_seq_timer_set_skew(struct snd_seq_timer *tmr, unsigned int skew, unsigned int base) { - unsigned long flags; - if (snd_BUG_ON(!tmr)) return -EINVAL; @@ -249,9 +226,8 @@ int snd_seq_timer_set_skew(struct snd_seq_timer *tmr, unsigned int skew, pr_debug("ALSA: seq: invalid skew base 0x%x\n", base); return -EINVAL; } - spin_lock_irqsave(&tmr->lock, flags); + guard(spinlock_irqsave)(&tmr->lock); tmr->skew = skew; - spin_unlock_irqrestore(&tmr->lock, flags); return 0; } @@ -296,12 +272,12 @@ int snd_seq_timer_open(struct snd_seq_queue *q) snd_timer_instance_free(t); return err; } - spin_lock_irq(&tmr->lock); - if (tmr->timeri) - err = -EBUSY; - else - tmr->timeri = t; - spin_unlock_irq(&tmr->lock); + scoped_guard(spinlock_irq, &tmr->lock) { + if (tmr->timeri) + err = -EBUSY; + else + tmr->timeri = t; + } if (err < 0) { snd_timer_close(t); snd_timer_instance_free(t); @@ -318,10 +294,10 @@ int snd_seq_timer_close(struct snd_seq_queue *q) tmr = q->timer; if (snd_BUG_ON(!tmr)) return -EINVAL; - spin_lock_irq(&tmr->lock); - t = tmr->timeri; - tmr->timeri = NULL; - spin_unlock_irq(&tmr->lock); + scoped_guard(spinlock_irq, &tmr->lock) { + t = tmr->timeri; + tmr->timeri = NULL; + } if (t) { snd_timer_close(t); snd_timer_instance_free(t); @@ -342,13 +318,8 @@ static int seq_timer_stop(struct snd_seq_timer *tmr) int snd_seq_timer_stop(struct snd_seq_timer *tmr) { - unsigned long flags; - int err; - - spin_lock_irqsave(&tmr->lock, flags); - err = seq_timer_stop(tmr); - spin_unlock_irqrestore(&tmr->lock, flags); - return err; + guard(spinlock_irqsave)(&tmr->lock); + return seq_timer_stop(tmr); } static int initialize_timer(struct snd_seq_timer *tmr) @@ -398,13 +369,8 @@ static int seq_timer_start(struct snd_seq_timer *tmr) int snd_seq_timer_start(struct snd_seq_timer *tmr) { - unsigned long flags; - int err; - - spin_lock_irqsave(&tmr->lock, flags); - err = seq_timer_start(tmr); - spin_unlock_irqrestore(&tmr->lock, flags); - return err; + guard(spinlock_irqsave)(&tmr->lock); + return seq_timer_start(tmr); } static int seq_timer_continue(struct snd_seq_timer *tmr) @@ -426,13 +392,8 @@ static int seq_timer_continue(struct snd_seq_timer *tmr) int snd_seq_timer_continue(struct snd_seq_timer *tmr) { - unsigned long flags; - int err; - - spin_lock_irqsave(&tmr->lock, flags); - err = seq_timer_continue(tmr); - spin_unlock_irqrestore(&tmr->lock, flags); - return err; + guard(spinlock_irqsave)(&tmr->lock); + return seq_timer_continue(tmr); } /* return current 'real' time. use timeofday() to get better granularity. */ @@ -440,9 +401,8 @@ snd_seq_real_time_t snd_seq_timer_get_cur_time(struct snd_seq_timer *tmr, bool adjust_ktime) { snd_seq_real_time_t cur_time; - unsigned long flags; - spin_lock_irqsave(&tmr->lock, flags); + guard(spinlock_irqsave)(&tmr->lock); cur_time = tmr->cur_time; if (adjust_ktime && tmr->running) { struct timespec64 tm; @@ -453,7 +413,6 @@ snd_seq_real_time_t snd_seq_timer_get_cur_time(struct snd_seq_timer *tmr, cur_time.tv_sec += tm.tv_sec; snd_seq_sanity_real_time(&cur_time); } - spin_unlock_irqrestore(&tmr->lock, flags); return cur_time; } @@ -461,13 +420,8 @@ snd_seq_real_time_t snd_seq_timer_get_cur_time(struct snd_seq_timer *tmr, high PPQ values) */ snd_seq_tick_time_t snd_seq_timer_get_cur_tick(struct snd_seq_timer *tmr) { - snd_seq_tick_time_t cur_tick; - unsigned long flags; - - spin_lock_irqsave(&tmr->lock, flags); - cur_tick = tmr->tick.cur_tick; - spin_unlock_irqrestore(&tmr->lock, flags); - return cur_tick; + guard(spinlock_irqsave)(&tmr->lock); + return tmr->tick.cur_tick; } @@ -486,19 +440,18 @@ void snd_seq_info_timer_read(struct snd_info_entry *entry, q = queueptr(idx); if (q == NULL) continue; - mutex_lock(&q->timer_mutex); - tmr = q->timer; - if (!tmr) - goto unlock; - ti = tmr->timeri; - if (!ti) - goto unlock; - snd_iprintf(buffer, "Timer for queue %i : %s\n", q->queue, ti->timer->name); - resolution = snd_timer_resolution(ti) * tmr->ticks; - snd_iprintf(buffer, " Period time : %lu.%09lu\n", resolution / 1000000000, resolution % 1000000000); - snd_iprintf(buffer, " Skew : %u / %u\n", tmr->skew, tmr->skew_base); -unlock: - mutex_unlock(&q->timer_mutex); + scoped_guard(mutex, &q->timer_mutex) { + tmr = q->timer; + if (!tmr) + break; + ti = tmr->timeri; + if (!ti) + break; + snd_iprintf(buffer, "Timer for queue %i : %s\n", q->queue, ti->timer->name); + resolution = snd_timer_resolution(ti) * tmr->ticks; + snd_iprintf(buffer, " Period time : %lu.%09lu\n", resolution / 1000000000, resolution % 1000000000); + snd_iprintf(buffer, " Skew : %u / %u\n", tmr->skew, tmr->skew_base); + } queuefree(q); } } diff --git a/sound/core/seq/seq_ump_client.c b/sound/core/seq/seq_ump_client.c index 2db371d799..c627d72f7f 100644 --- a/sound/core/seq/seq_ump_client.c +++ b/sound/core/seq/seq_ump_client.c @@ -115,21 +115,19 @@ static int seq_ump_process_event(struct snd_seq_event *ev, int direct, static int seq_ump_client_open(struct seq_ump_client *client, int dir) { struct snd_ump_endpoint *ump = client->ump; - int err = 0; + int err; - mutex_lock(&ump->open_mutex); + guard(mutex)(&ump->open_mutex); if (dir == STR_OUT && !client->opened[dir]) { err = snd_rawmidi_kernel_open(&ump->core, 0, SNDRV_RAWMIDI_LFLG_OUTPUT | SNDRV_RAWMIDI_LFLG_APPEND, &client->out_rfile); if (err < 0) - goto unlock; + return err; } client->opened[dir]++; - unlock: - mutex_unlock(&ump->open_mutex); - return err; + return 0; } /* close the rawmidi */ @@ -137,11 +135,10 @@ static int seq_ump_client_close(struct seq_ump_client *client, int dir) { struct snd_ump_endpoint *ump = client->ump; - mutex_lock(&ump->open_mutex); + guard(mutex)(&ump->open_mutex); if (!--client->opened[dir]) if (dir == STR_OUT) snd_rawmidi_kernel_release(&client->out_rfile); - mutex_unlock(&ump->open_mutex); return 0; } @@ -217,15 +214,12 @@ static void fill_port_info(struct snd_seq_port_info *port, static int seq_ump_group_init(struct seq_ump_client *client, int group_index) { struct seq_ump_group *group = &client->groups[group_index]; - struct snd_seq_port_info *port; + struct snd_seq_port_info *port __free(kfree) = NULL; struct snd_seq_port_callback pcallbacks; - int err; port = kzalloc(sizeof(*port), GFP_KERNEL); - if (!port) { - err = -ENOMEM; - goto error; - } + if (!port) + return -ENOMEM; fill_port_info(port, client, group); port->flags = SNDRV_SEQ_PORT_FLG_GIVEN_PORT; @@ -238,24 +232,22 @@ static int seq_ump_group_init(struct seq_ump_client *client, int group_index) pcallbacks.unuse = seq_ump_unuse; pcallbacks.event_input = seq_ump_process_event; port->kernel = &pcallbacks; - err = snd_seq_kernel_client_ctl(client->seq_client, - SNDRV_SEQ_IOCTL_CREATE_PORT, - port); - error: - kfree(port); - return err; + return snd_seq_kernel_client_ctl(client->seq_client, + SNDRV_SEQ_IOCTL_CREATE_PORT, + port); } /* update the sequencer ports; called from notify_fb_change callback */ static void update_port_infos(struct seq_ump_client *client) { - struct snd_seq_port_info *old, *new; + struct snd_seq_port_info *old __free(kfree) = NULL; + struct snd_seq_port_info *new __free(kfree) = NULL; int i, err; old = kzalloc(sizeof(*old), GFP_KERNEL); new = kzalloc(sizeof(*new), GFP_KERNEL); if (!old || !new) - goto error; + return; for (i = 0; i < SNDRV_UMP_MAX_GROUPS; i++) { old->addr.client = client->seq_client; @@ -264,7 +256,7 @@ static void update_port_infos(struct seq_ump_client *client) SNDRV_SEQ_IOCTL_GET_PORT_INFO, old); if (err < 0) - goto error; + return; fill_port_info(new, client, &client->groups[i]); if (old->capability == new->capability && !strcmp(old->name, new->name)) @@ -273,13 +265,10 @@ static void update_port_infos(struct seq_ump_client *client) SNDRV_SEQ_IOCTL_SET_PORT_INFO, new); if (err < 0) - goto error; + return; /* notify to system port */ snd_seq_system_client_ev_port_change(client->seq_client, i); } - error: - kfree(new); - kfree(old); } /* update dir_bits and active flag for all groups in the client */ @@ -334,7 +323,7 @@ static void update_group_attrs(struct seq_ump_client *client) /* create a UMP Endpoint port */ static int create_ump_endpoint_port(struct seq_ump_client *client) { - struct snd_seq_port_info *port; + struct snd_seq_port_info *port __free(kfree) = NULL; struct snd_seq_port_callback pcallbacks; unsigned int rawmidi_info = client->ump->core.info_flags; int err; @@ -383,7 +372,6 @@ static int create_ump_endpoint_port(struct seq_ump_client *client) err = snd_seq_kernel_client_ctl(client->seq_client, SNDRV_SEQ_IOCTL_CREATE_PORT, port); - kfree(port); return err; } diff --git a/sound/core/seq/seq_ump_convert.c b/sound/core/seq/seq_ump_convert.c index ee6ac649df..d81f776a4c 100644 --- a/sound/core/seq/seq_ump_convert.c +++ b/sound/core/seq/seq_ump_convert.c @@ -157,7 +157,7 @@ static void ump_system_to_one_param_ev(const union snd_ump_midi1_msg *val, static void ump_system_to_songpos_ev(const union snd_ump_midi1_msg *val, struct snd_seq_event *ev) { - ev->data.control.value = (val->system.parm1 << 7) | val->system.parm2; + ev->data.control.value = (val->system.parm2 << 7) | val->system.parm1; } /* Encoders for 0xf0 - 0xff */ @@ -368,6 +368,7 @@ static int cvt_ump_midi1_to_midi2(struct snd_seq_client *dest, struct snd_seq_ump_event ev_cvt; const union snd_ump_midi1_msg *midi1 = (const union snd_ump_midi1_msg *)event->ump; union snd_ump_midi2_msg *midi2 = (union snd_ump_midi2_msg *)ev_cvt.ump; + struct snd_seq_ump_midi2_bank *cc; ev_cvt = *event; memset(&ev_cvt.ump, 0, sizeof(ev_cvt.ump)); @@ -387,11 +388,29 @@ static int cvt_ump_midi1_to_midi2(struct snd_seq_client *dest, midi2->paf.data = upscale_7_to_32bit(midi1->paf.data); break; case UMP_MSG_STATUS_CC: + cc = &dest_port->midi2_bank[midi1->note.channel]; + switch (midi1->cc.index) { + case UMP_CC_BANK_SELECT: + cc->bank_set = 1; + cc->cc_bank_msb = midi1->cc.data; + return 0; // skip + case UMP_CC_BANK_SELECT_LSB: + cc->bank_set = 1; + cc->cc_bank_lsb = midi1->cc.data; + return 0; // skip + } midi2->cc.index = midi1->cc.index; midi2->cc.data = upscale_7_to_32bit(midi1->cc.data); break; case UMP_MSG_STATUS_PROGRAM: midi2->pg.program = midi1->pg.program; + cc = &dest_port->midi2_bank[midi1->note.channel]; + if (cc->bank_set) { + midi2->pg.bank_valid = 1; + midi2->pg.bank_msb = cc->cc_bank_msb; + midi2->pg.bank_lsb = cc->cc_bank_lsb; + cc->bank_set = 0; + } break; case UMP_MSG_STATUS_CHANNEL_PRESSURE: midi2->caf.data = upscale_7_to_32bit(midi1->caf.data); @@ -419,6 +438,7 @@ static int cvt_ump_midi2_to_midi1(struct snd_seq_client *dest, struct snd_seq_ump_event ev_cvt; union snd_ump_midi1_msg *midi1 = (union snd_ump_midi1_msg *)ev_cvt.ump; const union snd_ump_midi2_msg *midi2 = (const union snd_ump_midi2_msg *)event->ump; + int err; u16 v; ev_cvt = *event; @@ -443,6 +463,24 @@ static int cvt_ump_midi2_to_midi1(struct snd_seq_client *dest, midi1->cc.data = downscale_32_to_7bit(midi2->cc.data); break; case UMP_MSG_STATUS_PROGRAM: + if (midi2->pg.bank_valid) { + midi1->cc.status = UMP_MSG_STATUS_CC; + midi1->cc.index = UMP_CC_BANK_SELECT; + midi1->cc.data = midi2->pg.bank_msb; + err = __snd_seq_deliver_single_event(dest, dest_port, + (struct snd_seq_event *)&ev_cvt, + atomic, hop); + if (err < 0) + return err; + midi1->cc.index = UMP_CC_BANK_SELECT_LSB; + midi1->cc.data = midi2->pg.bank_lsb; + err = __snd_seq_deliver_single_event(dest, dest_port, + (struct snd_seq_event *)&ev_cvt, + atomic, hop); + if (err < 0) + return err; + midi1->note.status = midi2->note.status; + } midi1->pg.program = midi2->pg.program; break; case UMP_MSG_STATUS_CHANNEL_PRESSURE: @@ -691,6 +729,7 @@ static int system_ev_to_ump_midi1(const struct snd_seq_event *event, union snd_ump_midi1_msg *data, unsigned char status) { + data->system.type = UMP_MSG_TYPE_SYSTEM; // override data->system.status = status; return 1; } @@ -701,6 +740,7 @@ static int system_1p_ev_to_ump_midi1(const struct snd_seq_event *event, union snd_ump_midi1_msg *data, unsigned char status) { + data->system.type = UMP_MSG_TYPE_SYSTEM; // override data->system.status = status; data->system.parm1 = event->data.control.value & 0x7f; return 1; @@ -712,9 +752,10 @@ static int system_2p_ev_to_ump_midi1(const struct snd_seq_event *event, union snd_ump_midi1_msg *data, unsigned char status) { + data->system.type = UMP_MSG_TYPE_SYSTEM; // override data->system.status = status; - data->system.parm1 = (event->data.control.value >> 7) & 0x7f; - data->system.parm2 = event->data.control.value & 0x7f; + data->system.parm1 = event->data.control.value & 0x7f; + data->system.parm2 = (event->data.control.value >> 7) & 0x7f; return 1; } @@ -854,7 +895,6 @@ static int pgm_ev_to_ump_midi2(const struct snd_seq_event *event, data->pg.bank_msb = cc->cc_bank_msb; data->pg.bank_lsb = cc->cc_bank_lsb; cc->bank_set = 0; - cc->cc_bank_msb = cc->cc_bank_lsb = 0; } return 1; } @@ -1035,6 +1075,8 @@ static const struct seq_ev_to_ump seq_ev_ump_encoders[] = { system_ev_to_ump_midi1, system_ev_to_ump_midi2 }, { SNDRV_SEQ_EVENT_SENSING, UMP_SYSTEM_STATUS_ACTIVE_SENSING, system_ev_to_ump_midi1, system_ev_to_ump_midi2 }, + { SNDRV_SEQ_EVENT_RESET, UMP_SYSTEM_STATUS_RESET, + system_ev_to_ump_midi1, system_ev_to_ump_midi2 }, }; static const struct seq_ev_to_ump *find_ump_encoder(int type) diff --git a/sound/core/seq/seq_virmidi.c b/sound/core/seq/seq_virmidi.c index 1678737f11..b4672613c2 100644 --- a/sound/core/seq/seq_virmidi.c +++ b/sound/core/seq/seq_virmidi.c @@ -199,11 +199,10 @@ static int snd_virmidi_input_open(struct snd_rawmidi_substream *substream) vmidi->client = rdev->client; vmidi->port = rdev->port; runtime->private_data = vmidi; - down_write(&rdev->filelist_sem); - write_lock_irq(&rdev->filelist_lock); - list_add_tail(&vmidi->list, &rdev->filelist); - write_unlock_irq(&rdev->filelist_lock); - up_write(&rdev->filelist_sem); + scoped_guard(rwsem_write, &rdev->filelist_sem) { + guard(write_lock_irq)(&rdev->filelist_lock); + list_add_tail(&vmidi->list, &rdev->filelist); + } vmidi->rdev = rdev; return 0; } @@ -243,11 +242,10 @@ static int snd_virmidi_input_close(struct snd_rawmidi_substream *substream) struct snd_virmidi_dev *rdev = substream->rmidi->private_data; struct snd_virmidi *vmidi = substream->runtime->private_data; - down_write(&rdev->filelist_sem); - write_lock_irq(&rdev->filelist_lock); - list_del(&vmidi->list); - write_unlock_irq(&rdev->filelist_lock); - up_write(&rdev->filelist_sem); + scoped_guard(rwsem_write, &rdev->filelist_sem) { + guard(write_lock_irq)(&rdev->filelist_lock); + list_del(&vmidi->list); + } snd_midi_event_free(vmidi->parser); substream->runtime->private_data = NULL; kfree(vmidi); @@ -363,26 +361,22 @@ static int snd_virmidi_dev_attach_seq(struct snd_virmidi_dev *rdev) { int client; struct snd_seq_port_callback pcallbacks; - struct snd_seq_port_info *pinfo; + struct snd_seq_port_info *pinfo __free(kfree) = NULL; int err; if (rdev->client >= 0) return 0; pinfo = kzalloc(sizeof(*pinfo), GFP_KERNEL); - if (!pinfo) { - err = -ENOMEM; - goto __error; - } + if (!pinfo) + return -ENOMEM; client = snd_seq_create_kernel_client(rdev->card, rdev->device, "%s %d-%d", rdev->rmidi->name, rdev->card->number, rdev->device); - if (client < 0) { - err = client; - goto __error; - } + if (client < 0) + return client; rdev->client = client; /* create a port */ @@ -410,15 +404,11 @@ static int snd_virmidi_dev_attach_seq(struct snd_virmidi_dev *rdev) if (err < 0) { snd_seq_delete_kernel_client(client); rdev->client = -1; - goto __error; + return err; } rdev->port = pinfo->addr.port; - err = 0; /* success */ - - __error: - kfree(pinfo); - return err; + return 0; /* success */ } diff --git a/sound/core/seq_device.c b/sound/core/seq_device.c index 7f3fd8eb01..654d620d01 100644 --- a/sound/core/seq_device.c +++ b/sound/core/seq_device.c @@ -49,7 +49,7 @@ static int snd_seq_bus_match(struct device *dev, struct device_driver *drv) sdrv->argsize == sdev->argsize; } -static struct bus_type snd_seq_bus_type = { +static const struct bus_type snd_seq_bus_type = { .name = "snd_seq", .match = snd_seq_bus_match, }; diff --git a/sound/core/sound.c b/sound/core/sound.c index df5571d986..b9db9aa0bf 100644 --- a/sound/core/sound.c +++ b/sound/core/sound.c @@ -103,7 +103,7 @@ void *snd_lookup_minor_data(unsigned int minor, int type) if (minor >= ARRAY_SIZE(snd_minors)) return NULL; - mutex_lock(&sound_mutex); + guard(mutex)(&sound_mutex); mreg = snd_minors[minor]; if (mreg && mreg->type == type) { private_data = mreg->private_data; @@ -111,7 +111,6 @@ void *snd_lookup_minor_data(unsigned int minor, int type) get_device(&mreg->card_ptr->card_dev); } else private_data = NULL; - mutex_unlock(&sound_mutex); return private_data; } EXPORT_SYMBOL(snd_lookup_minor_data); @@ -150,17 +149,15 @@ static int snd_open(struct inode *inode, struct file *file) if (minor >= ARRAY_SIZE(snd_minors)) return -ENODEV; - mutex_lock(&sound_mutex); - mptr = snd_minors[minor]; - if (mptr == NULL) { - mptr = autoload_device(minor); - if (!mptr) { - mutex_unlock(&sound_mutex); - return -ENODEV; + scoped_guard(mutex, &sound_mutex) { + mptr = snd_minors[minor]; + if (mptr == NULL) { + mptr = autoload_device(minor); + if (!mptr) + return -ENODEV; } + new_fops = fops_get(mptr->f_ops); } - new_fops = fops_get(mptr->f_ops); - mutex_unlock(&sound_mutex); if (!new_fops) return -ENODEV; replace_fops(file, new_fops); @@ -269,7 +266,7 @@ int snd_register_device(int type, struct snd_card *card, int dev, preg->f_ops = f_ops; preg->private_data = private_data; preg->card_ptr = card; - mutex_lock(&sound_mutex); + guard(mutex)(&sound_mutex); minor = snd_find_free_minor(type, card, dev); if (minor < 0) { err = minor; @@ -284,7 +281,6 @@ int snd_register_device(int type, struct snd_card *card, int dev, snd_minors[minor] = preg; error: - mutex_unlock(&sound_mutex); if (err < 0) kfree(preg); return err; @@ -305,7 +301,7 @@ int snd_unregister_device(struct device *dev) int minor; struct snd_minor *preg; - mutex_lock(&sound_mutex); + guard(mutex)(&sound_mutex); for (minor = 0; minor < ARRAY_SIZE(snd_minors); ++minor) { preg = snd_minors[minor]; if (preg && preg->dev == dev) { @@ -315,7 +311,6 @@ int snd_unregister_device(struct device *dev) break; } } - mutex_unlock(&sound_mutex); if (minor >= ARRAY_SIZE(snd_minors)) return -ENOENT; return 0; @@ -355,7 +350,7 @@ static void snd_minor_info_read(struct snd_info_entry *entry, struct snd_info_bu int minor; struct snd_minor *mptr; - mutex_lock(&sound_mutex); + guard(mutex)(&sound_mutex); for (minor = 0; minor < SNDRV_OS_MINORS; ++minor) { mptr = snd_minors[minor]; if (!mptr) @@ -373,7 +368,6 @@ static void snd_minor_info_read(struct snd_info_entry *entry, struct snd_info_bu snd_iprintf(buffer, "%3i: : %s\n", minor, snd_device_type_name(mptr->type)); } - mutex_unlock(&sound_mutex); } int __init snd_minor_info_init(void) diff --git a/sound/core/sound_kunit.c b/sound/core/sound_kunit.c new file mode 100644 index 0000000000..eb90f62228 --- /dev/null +++ b/sound/core/sound_kunit.c @@ -0,0 +1,312 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Sound core KUnit test + * Author: Ivan Orlov <ivan.orlov0322@gmail.com> + */ + +#include <kunit/test.h> +#include <sound/core.h> +#include <sound/pcm.h> + +#define SILENCE_BUFFER_MAX_FRAMES 260 +#define SILENCE_BUFFER_SIZE (sizeof(u64) * SILENCE_BUFFER_MAX_FRAMES) +#define SILENCE(...) { __VA_ARGS__ } +#define DEFINE_FORMAT(fmt, pbits, wd, endianness, signd, silence_arr) { \ + .format = SNDRV_PCM_FORMAT_##fmt, .physical_bits = pbits, \ + .width = wd, .le = endianness, .sd = signd, .silence = silence_arr, \ + .name = #fmt, \ +} + +#define WRONG_FORMAT_1 (__force snd_pcm_format_t)((__force int)SNDRV_PCM_FORMAT_LAST + 1) +#define WRONG_FORMAT_2 (__force snd_pcm_format_t)-1 + +#define VALID_NAME "ValidName" +#define NAME_W_SPEC_CHARS "In%v@1id name" +#define NAME_W_SPACE "Test name" +#define NAME_W_SPACE_REMOVED "Testname" + +#define TEST_FIRST_COMPONENT "Component1" +#define TEST_SECOND_COMPONENT "Component2" + +struct snd_format_test_data { + snd_pcm_format_t format; + int physical_bits; + int width; + int le; + int sd; + unsigned char silence[8]; + unsigned char *name; +}; + +struct avail_test_data { + snd_pcm_uframes_t buffer_size; + snd_pcm_uframes_t hw_ptr; + snd_pcm_uframes_t appl_ptr; + snd_pcm_uframes_t expected_avail; +}; + +static struct snd_format_test_data valid_fmt[] = { + DEFINE_FORMAT(S8, 8, 8, -1, 1, SILENCE()), + DEFINE_FORMAT(U8, 8, 8, -1, 0, SILENCE(0x80)), + DEFINE_FORMAT(S16_LE, 16, 16, 1, 1, SILENCE()), + DEFINE_FORMAT(S16_BE, 16, 16, 0, 1, SILENCE()), + DEFINE_FORMAT(U16_LE, 16, 16, 1, 0, SILENCE(0x00, 0x80)), + DEFINE_FORMAT(U16_BE, 16, 16, 0, 0, SILENCE(0x80, 0x00)), + DEFINE_FORMAT(S24_LE, 32, 24, 1, 1, SILENCE()), + DEFINE_FORMAT(S24_BE, 32, 24, 0, 1, SILENCE()), + DEFINE_FORMAT(U24_LE, 32, 24, 1, 0, SILENCE(0x00, 0x00, 0x80)), + DEFINE_FORMAT(U24_BE, 32, 24, 0, 0, SILENCE(0x00, 0x80, 0x00, 0x00)), + DEFINE_FORMAT(S32_LE, 32, 32, 1, 1, SILENCE()), + DEFINE_FORMAT(S32_BE, 32, 32, 0, 1, SILENCE()), + DEFINE_FORMAT(U32_LE, 32, 32, 1, 0, SILENCE(0x00, 0x00, 0x00, 0x80)), + DEFINE_FORMAT(U32_BE, 32, 32, 0, 0, SILENCE(0x80, 0x00, 0x00, 0x00)), + DEFINE_FORMAT(FLOAT_LE, 32, 32, 1, -1, SILENCE()), + DEFINE_FORMAT(FLOAT_BE, 32, 32, 0, -1, SILENCE()), + DEFINE_FORMAT(FLOAT64_LE, 64, 64, 1, -1, SILENCE()), + DEFINE_FORMAT(FLOAT64_BE, 64, 64, 0, -1, SILENCE()), + DEFINE_FORMAT(IEC958_SUBFRAME_LE, 32, 32, 1, -1, SILENCE()), + DEFINE_FORMAT(IEC958_SUBFRAME_BE, 32, 32, 0, -1, SILENCE()), + DEFINE_FORMAT(MU_LAW, 8, 8, -1, -1, SILENCE(0x7f)), + DEFINE_FORMAT(A_LAW, 8, 8, -1, -1, SILENCE(0x55)), + DEFINE_FORMAT(IMA_ADPCM, 4, 4, -1, -1, SILENCE()), + DEFINE_FORMAT(G723_24, 3, 3, -1, -1, SILENCE()), + DEFINE_FORMAT(G723_40, 5, 5, -1, -1, SILENCE()), + DEFINE_FORMAT(DSD_U8, 8, 8, 1, 0, SILENCE(0x69)), + DEFINE_FORMAT(DSD_U16_LE, 16, 16, 1, 0, SILENCE(0x69, 0x69)), + DEFINE_FORMAT(DSD_U32_LE, 32, 32, 1, 0, SILENCE(0x69, 0x69, 0x69, 0x69)), + DEFINE_FORMAT(DSD_U16_BE, 16, 16, 0, 0, SILENCE(0x69, 0x69)), + DEFINE_FORMAT(DSD_U32_BE, 32, 32, 0, 0, SILENCE(0x69, 0x69, 0x69, 0x69)), + DEFINE_FORMAT(S20_LE, 32, 20, 1, 1, SILENCE()), + DEFINE_FORMAT(S20_BE, 32, 20, 0, 1, SILENCE()), + DEFINE_FORMAT(U20_LE, 32, 20, 1, 0, SILENCE(0x00, 0x00, 0x08, 0x00)), + DEFINE_FORMAT(U20_BE, 32, 20, 0, 0, SILENCE(0x00, 0x08, 0x00, 0x00)), + DEFINE_FORMAT(S24_3LE, 24, 24, 1, 1, SILENCE()), + DEFINE_FORMAT(S24_3BE, 24, 24, 0, 1, SILENCE()), + DEFINE_FORMAT(U24_3LE, 24, 24, 1, 0, SILENCE(0x00, 0x00, 0x80)), + DEFINE_FORMAT(U24_3BE, 24, 24, 0, 0, SILENCE(0x80, 0x00, 0x00)), + DEFINE_FORMAT(S20_3LE, 24, 20, 1, 1, SILENCE()), + DEFINE_FORMAT(S20_3BE, 24, 20, 0, 1, SILENCE()), + DEFINE_FORMAT(U20_3LE, 24, 20, 1, 0, SILENCE(0x00, 0x00, 0x08)), + DEFINE_FORMAT(U20_3BE, 24, 20, 0, 0, SILENCE(0x08, 0x00, 0x00)), + DEFINE_FORMAT(S18_3LE, 24, 18, 1, 1, SILENCE()), + DEFINE_FORMAT(S18_3BE, 24, 18, 0, 1, SILENCE()), + DEFINE_FORMAT(U18_3LE, 24, 18, 1, 0, SILENCE(0x00, 0x00, 0x02)), + DEFINE_FORMAT(U18_3BE, 24, 18, 0, 0, SILENCE(0x02, 0x00, 0x00)), + DEFINE_FORMAT(G723_24_1B, 8, 3, -1, -1, SILENCE()), + DEFINE_FORMAT(G723_40_1B, 8, 5, -1, -1, SILENCE()), +}; + +static void test_phys_format_size(struct kunit *test) +{ + u32 i; + + for (i = 0; i < ARRAY_SIZE(valid_fmt); i++) { + KUNIT_EXPECT_EQ(test, snd_pcm_format_physical_width(valid_fmt[i].format), + valid_fmt[i].physical_bits); + } + + KUNIT_EXPECT_EQ(test, snd_pcm_format_physical_width(WRONG_FORMAT_1), -EINVAL); + KUNIT_EXPECT_EQ(test, snd_pcm_format_physical_width(WRONG_FORMAT_2), -EINVAL); +} + +static void test_format_width(struct kunit *test) +{ + u32 i; + + for (i = 0; i < ARRAY_SIZE(valid_fmt); i++) { + KUNIT_EXPECT_EQ(test, snd_pcm_format_width(valid_fmt[i].format), + valid_fmt[i].width); + } + + KUNIT_EXPECT_EQ(test, snd_pcm_format_width(WRONG_FORMAT_1), -EINVAL); + KUNIT_EXPECT_EQ(test, snd_pcm_format_width(WRONG_FORMAT_2), -EINVAL); +} + +static void test_format_signed(struct kunit *test) +{ + u32 i; + + for (i = 0; i < ARRAY_SIZE(valid_fmt); i++) { + KUNIT_EXPECT_EQ(test, snd_pcm_format_signed(valid_fmt[i].format), + valid_fmt[i].sd < 0 ? -EINVAL : valid_fmt[i].sd); + KUNIT_EXPECT_EQ(test, snd_pcm_format_unsigned(valid_fmt[i].format), + valid_fmt[i].sd < 0 ? -EINVAL : 1 - valid_fmt[i].sd); + } + + KUNIT_EXPECT_EQ(test, snd_pcm_format_width(WRONG_FORMAT_1), -EINVAL); + KUNIT_EXPECT_EQ(test, snd_pcm_format_width(WRONG_FORMAT_2), -EINVAL); +} + +static void test_format_endianness(struct kunit *test) +{ + u32 i; + + for (i = 0; i < ARRAY_SIZE(valid_fmt); i++) { + KUNIT_EXPECT_EQ(test, snd_pcm_format_little_endian(valid_fmt[i].format), + valid_fmt[i].le < 0 ? -EINVAL : valid_fmt[i].le); + KUNIT_EXPECT_EQ(test, snd_pcm_format_big_endian(valid_fmt[i].format), + valid_fmt[i].le < 0 ? -EINVAL : 1 - valid_fmt[i].le); + } + + KUNIT_EXPECT_EQ(test, snd_pcm_format_little_endian(WRONG_FORMAT_1), -EINVAL); + KUNIT_EXPECT_EQ(test, snd_pcm_format_little_endian(WRONG_FORMAT_2), -EINVAL); + KUNIT_EXPECT_EQ(test, snd_pcm_format_big_endian(WRONG_FORMAT_1), -EINVAL); + KUNIT_EXPECT_EQ(test, snd_pcm_format_big_endian(WRONG_FORMAT_2), -EINVAL); +} + +static void _test_fill_silence(struct kunit *test, struct snd_format_test_data *data, + u8 *buffer, size_t samples_count) +{ + size_t sample_bytes = data->physical_bits >> 3; + u32 i; + + KUNIT_ASSERT_EQ(test, snd_pcm_format_set_silence(data->format, buffer, samples_count), 0); + for (i = 0; i < samples_count * sample_bytes; i++) + KUNIT_EXPECT_EQ(test, buffer[i], data->silence[i % sample_bytes]); +} + +static void test_format_fill_silence(struct kunit *test) +{ + u32 buf_samples[] = { 10, 20, 32, 64, 129, SILENCE_BUFFER_MAX_FRAMES }; + u8 *buffer; + u32 i, j; + + buffer = kunit_kzalloc(test, SILENCE_BUFFER_SIZE, GFP_KERNEL); + + for (i = 0; i < ARRAY_SIZE(buf_samples); i++) { + for (j = 0; j < ARRAY_SIZE(valid_fmt); j++) + _test_fill_silence(test, &valid_fmt[j], buffer, buf_samples[i]); + } + + KUNIT_EXPECT_EQ(test, snd_pcm_format_set_silence(WRONG_FORMAT_1, buffer, 20), -EINVAL); + KUNIT_EXPECT_EQ(test, snd_pcm_format_set_silence(SNDRV_PCM_FORMAT_LAST, buffer, 0), 0); +} + +static snd_pcm_uframes_t calculate_boundary(snd_pcm_uframes_t buffer_size) +{ + snd_pcm_uframes_t boundary = buffer_size; + + while (boundary * 2 <= 0x7fffffffUL - buffer_size) + boundary *= 2; + return boundary; +} + +static struct avail_test_data p_avail_data[] = { + /* buf_size + hw_ptr < appl_ptr => avail = buf_size + hw_ptr - appl_ptr + boundary */ + { 128, 1000, 1129, 1073741824UL - 1 }, + /* + * buf_size + hw_ptr - appl_ptr >= boundary => + * => avail = buf_size + hw_ptr - appl_ptr - boundary + */ + { 128, 1073741824UL, 10, 118 }, + /* standard case: avail = buf_size + hw_ptr - appl_ptr */ + { 128, 1000, 1001, 127 }, +}; + +static void test_playback_avail(struct kunit *test) +{ + struct snd_pcm_runtime *r = kunit_kzalloc(test, sizeof(*r), GFP_KERNEL); + u32 i; + + r->status = kunit_kzalloc(test, sizeof(*r->status), GFP_KERNEL); + r->control = kunit_kzalloc(test, sizeof(*r->control), GFP_KERNEL); + + for (i = 0; i < ARRAY_SIZE(p_avail_data); i++) { + r->buffer_size = p_avail_data[i].buffer_size; + r->boundary = calculate_boundary(r->buffer_size); + r->status->hw_ptr = p_avail_data[i].hw_ptr; + r->control->appl_ptr = p_avail_data[i].appl_ptr; + KUNIT_EXPECT_EQ(test, snd_pcm_playback_avail(r), p_avail_data[i].expected_avail); + } +} + +static struct avail_test_data c_avail_data[] = { + /* hw_ptr - appl_ptr < 0 => avail = hw_ptr - appl_ptr + boundary */ + { 128, 1000, 1001, 1073741824UL - 1 }, + /* standard case: avail = hw_ptr - appl_ptr */ + { 128, 1001, 1000, 1 }, +}; + +static void test_capture_avail(struct kunit *test) +{ + struct snd_pcm_runtime *r = kunit_kzalloc(test, sizeof(*r), GFP_KERNEL); + u32 i; + + r->status = kunit_kzalloc(test, sizeof(*r->status), GFP_KERNEL); + r->control = kunit_kzalloc(test, sizeof(*r->control), GFP_KERNEL); + + for (i = 0; i < ARRAY_SIZE(c_avail_data); i++) { + r->buffer_size = c_avail_data[i].buffer_size; + r->boundary = calculate_boundary(r->buffer_size); + r->status->hw_ptr = c_avail_data[i].hw_ptr; + r->control->appl_ptr = c_avail_data[i].appl_ptr; + KUNIT_EXPECT_EQ(test, snd_pcm_capture_avail(r), c_avail_data[i].expected_avail); + } +} + +static void test_card_set_id(struct kunit *test) +{ + struct snd_card *card = kunit_kzalloc(test, sizeof(*card), GFP_KERNEL); + + snd_card_set_id(card, VALID_NAME); + KUNIT_EXPECT_STREQ(test, card->id, VALID_NAME); + + /* clear the first id character so we can set it again */ + card->id[0] = '\0'; + snd_card_set_id(card, NAME_W_SPEC_CHARS); + KUNIT_EXPECT_STRNEQ(test, card->id, NAME_W_SPEC_CHARS); + + card->id[0] = '\0'; + snd_card_set_id(card, NAME_W_SPACE); + kunit_info(test, "%s", card->id); + KUNIT_EXPECT_STREQ(test, card->id, NAME_W_SPACE_REMOVED); +} + +static void test_pcm_format_name(struct kunit *test) +{ + u32 i; + const char *name; + + for (i = 0; i < ARRAY_SIZE(valid_fmt); i++) { + name = snd_pcm_format_name(valid_fmt[i].format); + KUNIT_ASSERT_NOT_NULL_MSG(test, name, "Don't have name for %s", valid_fmt[i].name); + KUNIT_EXPECT_STREQ(test, name, valid_fmt[i].name); + } + + KUNIT_ASSERT_STREQ(test, snd_pcm_format_name(WRONG_FORMAT_1), "Unknown"); + KUNIT_ASSERT_STREQ(test, snd_pcm_format_name(WRONG_FORMAT_2), "Unknown"); +} + +static void test_card_add_component(struct kunit *test) +{ + struct snd_card *card = kunit_kzalloc(test, sizeof(*card), GFP_KERNEL); + + snd_component_add(card, TEST_FIRST_COMPONENT); + KUNIT_ASSERT_STREQ(test, card->components, TEST_FIRST_COMPONENT); + + snd_component_add(card, TEST_SECOND_COMPONENT); + KUNIT_ASSERT_STREQ(test, card->components, TEST_FIRST_COMPONENT " " TEST_SECOND_COMPONENT); +} + +static struct kunit_case sound_utils_cases[] = { + KUNIT_CASE(test_phys_format_size), + KUNIT_CASE(test_format_width), + KUNIT_CASE(test_format_endianness), + KUNIT_CASE(test_format_signed), + KUNIT_CASE(test_format_fill_silence), + KUNIT_CASE(test_playback_avail), + KUNIT_CASE(test_capture_avail), + KUNIT_CASE(test_card_set_id), + KUNIT_CASE(test_pcm_format_name), + KUNIT_CASE(test_card_add_component), + {}, +}; + +static struct kunit_suite sound_utils_suite = { + .name = "sound-core-test", + .test_cases = sound_utils_cases, +}; + +kunit_test_suite(sound_utils_suite); +MODULE_AUTHOR("Ivan Orlov"); +MODULE_LICENSE("GPL"); diff --git a/sound/core/sound_oss.c b/sound/core/sound_oss.c index 2751bf2ff6..d65cc6fee2 100644 --- a/sound/core/sound_oss.c +++ b/sound/core/sound_oss.c @@ -29,7 +29,7 @@ void *snd_lookup_oss_minor_data(unsigned int minor, int type) if (minor >= ARRAY_SIZE(snd_oss_minors)) return NULL; - mutex_lock(&sound_oss_mutex); + guard(mutex)(&sound_oss_mutex); mreg = snd_oss_minors[minor]; if (mreg && mreg->type == type) { private_data = mreg->private_data; @@ -37,7 +37,6 @@ void *snd_lookup_oss_minor_data(unsigned int minor, int type) get_device(&mreg->card_ptr->card_dev); } else private_data = NULL; - mutex_unlock(&sound_oss_mutex); return private_data; } EXPORT_SYMBOL(snd_lookup_oss_minor_data); @@ -106,7 +105,7 @@ int snd_register_oss_device(int type, struct snd_card *card, int dev, preg->f_ops = f_ops; preg->private_data = private_data; preg->card_ptr = card; - mutex_lock(&sound_oss_mutex); + guard(mutex)(&sound_oss_mutex); snd_oss_minors[minor] = preg; minor_unit = SNDRV_MINOR_OSS_DEVICE(minor); switch (minor_unit) { @@ -130,7 +129,6 @@ int snd_register_oss_device(int type, struct snd_card *card, int dev, goto __end; snd_oss_minors[track2] = preg; } - mutex_unlock(&sound_oss_mutex); return 0; __end: @@ -139,7 +137,6 @@ int snd_register_oss_device(int type, struct snd_card *card, int dev, if (register1 >= 0) unregister_sound_special(register1); snd_oss_minors[minor] = NULL; - mutex_unlock(&sound_oss_mutex); kfree(preg); return -EBUSY; } @@ -156,12 +153,10 @@ int snd_unregister_oss_device(int type, struct snd_card *card, int dev) return 0; if (minor < 0) return minor; - mutex_lock(&sound_oss_mutex); + guard(mutex)(&sound_oss_mutex); mptr = snd_oss_minors[minor]; - if (mptr == NULL) { - mutex_unlock(&sound_oss_mutex); + if (mptr == NULL) return -ENOENT; - } switch (SNDRV_MINOR_OSS_DEVICE(minor)) { case SNDRV_MINOR_OSS_PCM: track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO); @@ -176,7 +171,6 @@ int snd_unregister_oss_device(int type, struct snd_card *card, int dev) if (track2 >= 0) snd_oss_minors[track2] = NULL; snd_oss_minors[minor] = NULL; - mutex_unlock(&sound_oss_mutex); /* call unregister_sound_special() outside sound_oss_mutex; * otherwise may deadlock, as it can trigger the release of a card @@ -220,7 +214,7 @@ static void snd_minor_info_oss_read(struct snd_info_entry *entry, int minor; struct snd_minor *mptr; - mutex_lock(&sound_oss_mutex); + guard(mutex)(&sound_oss_mutex); for (minor = 0; minor < SNDRV_OSS_MINORS; ++minor) { mptr = snd_oss_minors[minor]; if (!mptr) @@ -233,7 +227,6 @@ static void snd_minor_info_oss_read(struct snd_info_entry *entry, snd_iprintf(buffer, "%3i: : %s\n", minor, snd_oss_device_type_name(mptr->type)); } - mutex_unlock(&sound_oss_mutex); } diff --git a/sound/core/timer.c b/sound/core/timer.c index e6e551d4a2..d104adc75a 100644 --- a/sound/core/timer.c +++ b/sound/core/timer.c @@ -224,14 +224,12 @@ static int check_matching_master_slave(struct snd_timer_instance *master, return -EBUSY; list_move_tail(&slave->open_list, &master->slave_list_head); master->timer->num_instances++; - spin_lock_irq(&slave_active_lock); - spin_lock(&master->timer->lock); + guard(spinlock_irq)(&slave_active_lock); + guard(spinlock)(&master->timer->lock); slave->master = master; slave->timer = master->timer; if (slave->flags & SNDRV_TIMER_IFLG_RUNNING) list_add_tail(&slave->active_list, &master->slave_active_head); - spin_unlock(&master->timer->lock); - spin_unlock_irq(&slave_active_lock); return 1; } @@ -382,6 +380,25 @@ list_added: } EXPORT_SYMBOL(snd_timer_open); +/* remove slave links, called from snd_timer_close_locked() below */ +static void remove_slave_links(struct snd_timer_instance *timeri, + struct snd_timer *timer) +{ + struct snd_timer_instance *slave, *tmp; + + guard(spinlock_irq)(&slave_active_lock); + guard(spinlock)(&timer->lock); + timeri->timer = NULL; + list_for_each_entry_safe(slave, tmp, &timeri->slave_list_head, open_list) { + list_move_tail(&slave->open_list, &snd_timer_slave_list); + timer->num_instances--; + slave->master = NULL; + slave->timer = NULL; + list_del_init(&slave->ack_list); + list_del_init(&slave->active_list); + } +} + /* * close a timer instance * call this with register_mutex down. @@ -390,12 +407,10 @@ static void snd_timer_close_locked(struct snd_timer_instance *timeri, struct device **card_devp_to_put) { struct snd_timer *timer = timeri->timer; - struct snd_timer_instance *slave, *tmp; if (timer) { - spin_lock_irq(&timer->lock); + guard(spinlock_irq)(&timer->lock); timeri->flags |= SNDRV_TIMER_IFLG_DEAD; - spin_unlock_irq(&timer->lock); } if (!list_empty(&timeri->open_list)) { @@ -418,21 +433,7 @@ static void snd_timer_close_locked(struct snd_timer_instance *timeri, } spin_unlock_irq(&timer->lock); - /* remove slave links */ - spin_lock_irq(&slave_active_lock); - spin_lock(&timer->lock); - timeri->timer = NULL; - list_for_each_entry_safe(slave, tmp, &timeri->slave_list_head, - open_list) { - list_move_tail(&slave->open_list, &snd_timer_slave_list); - timer->num_instances--; - slave->master = NULL; - slave->timer = NULL; - list_del_init(&slave->ack_list); - list_del_init(&slave->active_list); - } - spin_unlock(&timer->lock); - spin_unlock_irq(&slave_active_lock); + remove_slave_links(timeri, timer); /* slave doesn't need to release timer resources below */ if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) @@ -459,9 +460,8 @@ void snd_timer_close(struct snd_timer_instance *timeri) if (snd_BUG_ON(!timeri)) return; - mutex_lock(®ister_mutex); - snd_timer_close_locked(timeri, &card_dev_to_put); - mutex_unlock(®ister_mutex); + scoped_guard(mutex, ®ister_mutex) + snd_timer_close_locked(timeri, &card_dev_to_put); /* put_device() is called after unlock for avoiding deadlock */ if (card_dev_to_put) put_device(card_dev_to_put); @@ -480,15 +480,13 @@ unsigned long snd_timer_resolution(struct snd_timer_instance *timeri) { struct snd_timer * timer; unsigned long ret = 0; - unsigned long flags; if (timeri == NULL) return 0; timer = timeri->timer; if (timer) { - spin_lock_irqsave(&timer->lock, flags); + guard(spinlock_irqsave)(&timer->lock); ret = snd_timer_hw_resolution(timer); - spin_unlock_irqrestore(&timer->lock, flags); } return ret; } @@ -532,25 +530,26 @@ static int snd_timer_start1(struct snd_timer_instance *timeri, { struct snd_timer *timer; int result; - unsigned long flags; timer = timeri->timer; if (!timer) return -EINVAL; - spin_lock_irqsave(&timer->lock, flags); - if (timeri->flags & SNDRV_TIMER_IFLG_DEAD) { - result = -EINVAL; - goto unlock; - } - if (timer->card && timer->card->shutdown) { - result = -ENODEV; - goto unlock; - } + guard(spinlock_irqsave)(&timer->lock); + if (timeri->flags & SNDRV_TIMER_IFLG_DEAD) + return -EINVAL; + if (timer->card && timer->card->shutdown) + return -ENODEV; if (timeri->flags & (SNDRV_TIMER_IFLG_RUNNING | - SNDRV_TIMER_IFLG_START)) { - result = -EBUSY; - goto unlock; + SNDRV_TIMER_IFLG_START)) + return -EBUSY; + + /* check the actual time for the start tick; + * bail out as error if it's way too low (< 100us) + */ + if (start) { + if ((u64)snd_timer_hw_resolution(timer) * ticks < 100000) + return -EINVAL; } if (start) @@ -577,8 +576,6 @@ static int snd_timer_start1(struct snd_timer_instance *timeri, } snd_timer_notify1(timeri, start ? SNDRV_TIMER_EVENT_START : SNDRV_TIMER_EVENT_CONTINUE); - unlock: - spin_unlock_irqrestore(&timer->lock, flags); return result; } @@ -586,53 +583,38 @@ static int snd_timer_start1(struct snd_timer_instance *timeri, static int snd_timer_start_slave(struct snd_timer_instance *timeri, bool start) { - unsigned long flags; - int err; - - spin_lock_irqsave(&slave_active_lock, flags); - if (timeri->flags & SNDRV_TIMER_IFLG_DEAD) { - err = -EINVAL; - goto unlock; - } - if (timeri->flags & SNDRV_TIMER_IFLG_RUNNING) { - err = -EBUSY; - goto unlock; - } + guard(spinlock_irqsave)(&slave_active_lock); + if (timeri->flags & SNDRV_TIMER_IFLG_DEAD) + return -EINVAL; + if (timeri->flags & SNDRV_TIMER_IFLG_RUNNING) + return -EBUSY; timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; if (timeri->master && timeri->timer) { - spin_lock(&timeri->timer->lock); + guard(spinlock)(&timeri->timer->lock); list_add_tail(&timeri->active_list, &timeri->master->slave_active_head); snd_timer_notify1(timeri, start ? SNDRV_TIMER_EVENT_START : SNDRV_TIMER_EVENT_CONTINUE); - spin_unlock(&timeri->timer->lock); } - err = 1; /* delayed start */ - unlock: - spin_unlock_irqrestore(&slave_active_lock, flags); - return err; + return 1; /* delayed start */ } /* stop/pause a master timer */ static int snd_timer_stop1(struct snd_timer_instance *timeri, bool stop) { struct snd_timer *timer; - int result = 0; - unsigned long flags; timer = timeri->timer; if (!timer) return -EINVAL; - spin_lock_irqsave(&timer->lock, flags); + guard(spinlock_irqsave)(&timer->lock); list_del_init(&timeri->ack_list); list_del_init(&timeri->active_list); if (!(timeri->flags & (SNDRV_TIMER_IFLG_RUNNING | - SNDRV_TIMER_IFLG_START))) { - result = -EBUSY; - goto unlock; - } + SNDRV_TIMER_IFLG_START))) + return -EBUSY; if (timer->card && timer->card->shutdown) - goto unlock; + return 0; if (stop) { timeri->cticks = timeri->ticks; timeri->pticks = 0; @@ -656,30 +638,25 @@ static int snd_timer_stop1(struct snd_timer_instance *timeri, bool stop) timeri->flags |= SNDRV_TIMER_IFLG_PAUSED; snd_timer_notify1(timeri, stop ? SNDRV_TIMER_EVENT_STOP : SNDRV_TIMER_EVENT_PAUSE); - unlock: - spin_unlock_irqrestore(&timer->lock, flags); - return result; + return 0; } /* stop/pause a slave timer */ static int snd_timer_stop_slave(struct snd_timer_instance *timeri, bool stop) { - unsigned long flags; bool running; - spin_lock_irqsave(&slave_active_lock, flags); + guard(spinlock_irqsave)(&slave_active_lock); running = timeri->flags & SNDRV_TIMER_IFLG_RUNNING; timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING; if (timeri->timer) { - spin_lock(&timeri->timer->lock); + guard(spinlock)(&timeri->timer->lock); list_del_init(&timeri->ack_list); list_del_init(&timeri->active_list); if (running) snd_timer_notify1(timeri, stop ? SNDRV_TIMER_EVENT_STOP : SNDRV_TIMER_EVENT_PAUSE); - spin_unlock(&timeri->timer->lock); } - spin_unlock_irqrestore(&slave_active_lock, flags); return running ? 0 : -EBUSY; } @@ -804,12 +781,9 @@ static void snd_timer_process_callbacks(struct snd_timer *timer, static void snd_timer_clear_callbacks(struct snd_timer *timer, struct list_head *head) { - unsigned long flags; - - spin_lock_irqsave(&timer->lock, flags); + guard(spinlock_irqsave)(&timer->lock); while (!list_empty(head)) list_del_init(head->next); - spin_unlock_irqrestore(&timer->lock, flags); } /* @@ -819,16 +793,14 @@ static void snd_timer_clear_callbacks(struct snd_timer *timer, static void snd_timer_work(struct work_struct *work) { struct snd_timer *timer = container_of(work, struct snd_timer, task_work); - unsigned long flags; if (timer->card && timer->card->shutdown) { snd_timer_clear_callbacks(timer, &timer->sack_list_head); return; } - spin_lock_irqsave(&timer->lock, flags); + guard(spinlock_irqsave)(&timer->lock); snd_timer_process_callbacks(timer, &timer->sack_list_head); - spin_unlock_irqrestore(&timer->lock, flags); } /* @@ -842,8 +814,6 @@ void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left) struct snd_timer_instance *ti, *ts, *tmp; unsigned long resolution; struct list_head *ack_list_head; - unsigned long flags; - bool use_work = false; if (timer == NULL) return; @@ -853,7 +823,7 @@ void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left) return; } - spin_lock_irqsave(&timer->lock, flags); + guard(spinlock_irqsave)(&timer->lock); /* remember the current resolution */ resolution = snd_timer_hw_resolution(timer); @@ -919,10 +889,7 @@ void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left) snd_timer_process_callbacks(timer, &timer->ack_list_head); /* do we have any slow callbacks? */ - use_work = !list_empty(&timer->sack_list_head); - spin_unlock_irqrestore(&timer->lock, flags); - - if (use_work) + if (!list_empty(&timer->sack_list_head)) queue_work(system_highpri_wq, &timer->task_work); } EXPORT_SYMBOL(snd_timer_interrupt); @@ -988,7 +955,7 @@ static int snd_timer_free(struct snd_timer *timer) if (!timer) return 0; - mutex_lock(®ister_mutex); + guard(mutex)(®ister_mutex); if (! list_empty(&timer->open_list_head)) { struct list_head *p, *n; struct snd_timer_instance *ti; @@ -1000,7 +967,6 @@ static int snd_timer_free(struct snd_timer *timer) } } list_del(&timer->device_list); - mutex_unlock(®ister_mutex); if (timer->private_free) timer->private_free(timer); @@ -1025,7 +991,7 @@ static int snd_timer_dev_register(struct snd_device *dev) !timer->hw.resolution && timer->hw.c_resolution == NULL) return -EINVAL; - mutex_lock(®ister_mutex); + guard(mutex)(®ister_mutex); list_for_each_entry(timer1, &snd_timer_list, device_list) { if (timer1->tmr_class > timer->tmr_class) break; @@ -1046,11 +1012,9 @@ static int snd_timer_dev_register(struct snd_device *dev) if (timer1->tmr_subdevice < timer->tmr_subdevice) continue; /* conflicts.. */ - mutex_unlock(®ister_mutex); return -EBUSY; } list_add_tail(&timer->device_list, &timer1->device_list); - mutex_unlock(®ister_mutex); return 0; } @@ -1059,20 +1023,18 @@ static int snd_timer_dev_disconnect(struct snd_device *device) struct snd_timer *timer = device->device_data; struct snd_timer_instance *ti; - mutex_lock(®ister_mutex); + guard(mutex)(®ister_mutex); list_del_init(&timer->device_list); /* wake up pending sleepers */ list_for_each_entry(ti, &timer->open_list_head, open_list) { if (ti->disconnect) ti->disconnect(ti); } - mutex_unlock(®ister_mutex); return 0; } void snd_timer_notify(struct snd_timer *timer, int event, struct timespec64 *tstamp) { - unsigned long flags; unsigned long resolution = 0; struct snd_timer_instance *ti, *ts; @@ -1083,7 +1045,7 @@ void snd_timer_notify(struct snd_timer *timer, int event, struct timespec64 *tst if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_MSTART || event > SNDRV_TIMER_EVENT_MRESUME)) return; - spin_lock_irqsave(&timer->lock, flags); + guard(spinlock_irqsave)(&timer->lock); if (event == SNDRV_TIMER_EVENT_MSTART || event == SNDRV_TIMER_EVENT_MCONTINUE || event == SNDRV_TIMER_EVENT_MRESUME) @@ -1095,7 +1057,6 @@ void snd_timer_notify(struct snd_timer *timer, int event, struct timespec64 *tst if (ts->ccallback) ts->ccallback(ts, event, tstamp, resolution); } - spin_unlock_irqrestore(&timer->lock, flags); } EXPORT_SYMBOL(snd_timer_notify); @@ -1248,7 +1209,7 @@ static void snd_timer_proc_read(struct snd_info_entry *entry, struct snd_timer_instance *ti; unsigned long resolution; - mutex_lock(®ister_mutex); + guard(mutex)(®ister_mutex); list_for_each_entry(timer, &snd_timer_list, device_list) { if (timer->card && timer->card->shutdown) continue; @@ -1270,9 +1231,8 @@ static void snd_timer_proc_read(struct snd_info_entry *entry, timer->tmr_device, timer->tmr_subdevice); } snd_iprintf(buffer, "%s :", timer->name); - spin_lock_irq(&timer->lock); - resolution = snd_timer_hw_resolution(timer); - spin_unlock_irq(&timer->lock); + scoped_guard(spinlock_irq, &timer->lock) + resolution = snd_timer_hw_resolution(timer); if (resolution) snd_iprintf(buffer, " %lu.%03luus (%lu ticks)", resolution / 1000, @@ -1288,7 +1248,6 @@ static void snd_timer_proc_read(struct snd_info_entry *entry, SNDRV_TIMER_IFLG_RUNNING)) ? "running" : "stopped"); } - mutex_unlock(®ister_mutex); } static struct snd_info_entry *snd_timer_proc_entry; @@ -1329,7 +1288,7 @@ static void snd_timer_user_interrupt(struct snd_timer_instance *timeri, struct snd_timer_read *r; int prev; - spin_lock(&tu->qlock); + guard(spinlock)(&tu->qlock); if (tu->qused > 0) { prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; r = &tu->queue[prev]; @@ -1348,7 +1307,6 @@ static void snd_timer_user_interrupt(struct snd_timer_instance *timeri, tu->qused++; } __wake: - spin_unlock(&tu->qlock); snd_kill_fasync(tu->fasync, SIGIO, POLL_IN); wake_up(&tu->qchange_sleep); } @@ -1372,7 +1330,6 @@ static void snd_timer_user_ccallback(struct snd_timer_instance *timeri, { struct snd_timer_user *tu = timeri->callback_data; struct snd_timer_tread64 r1; - unsigned long flags; if (event >= SNDRV_TIMER_EVENT_START && event <= SNDRV_TIMER_EVENT_PAUSE) @@ -1384,9 +1341,8 @@ static void snd_timer_user_ccallback(struct snd_timer_instance *timeri, r1.tstamp_sec = tstamp->tv_sec; r1.tstamp_nsec = tstamp->tv_nsec; r1.val = resolution; - spin_lock_irqsave(&tu->qlock, flags); - snd_timer_user_append_to_tqueue(tu, &r1); - spin_unlock_irqrestore(&tu->qlock, flags); + scoped_guard(spinlock_irqsave, &tu->qlock) + snd_timer_user_append_to_tqueue(tu, &r1); snd_kill_fasync(tu->fasync, SIGIO, POLL_IN); wake_up(&tu->qchange_sleep); } @@ -1410,51 +1366,48 @@ static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri, memset(&r1, 0, sizeof(r1)); memset(&tstamp, 0, sizeof(tstamp)); - spin_lock(&tu->qlock); - if ((tu->filter & ((1 << SNDRV_TIMER_EVENT_RESOLUTION) | - (1 << SNDRV_TIMER_EVENT_TICK))) == 0) { - spin_unlock(&tu->qlock); - return; - } - if (tu->last_resolution != resolution || ticks > 0) { - if (timer_tstamp_monotonic) - ktime_get_ts64(&tstamp); - else - ktime_get_real_ts64(&tstamp); - } - if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && - tu->last_resolution != resolution) { - r1.event = SNDRV_TIMER_EVENT_RESOLUTION; + scoped_guard(spinlock, &tu->qlock) { + if ((tu->filter & ((1 << SNDRV_TIMER_EVENT_RESOLUTION) | + (1 << SNDRV_TIMER_EVENT_TICK))) == 0) + return; + if (tu->last_resolution != resolution || ticks > 0) { + if (timer_tstamp_monotonic) + ktime_get_ts64(&tstamp); + else + ktime_get_real_ts64(&tstamp); + } + if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && + tu->last_resolution != resolution) { + r1.event = SNDRV_TIMER_EVENT_RESOLUTION; + r1.tstamp_sec = tstamp.tv_sec; + r1.tstamp_nsec = tstamp.tv_nsec; + r1.val = resolution; + snd_timer_user_append_to_tqueue(tu, &r1); + tu->last_resolution = resolution; + append++; + } + if ((tu->filter & (1 << SNDRV_TIMER_EVENT_TICK)) == 0) + break; + if (ticks == 0) + break; + if (tu->qused > 0) { + prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; + r = &tu->tqueue[prev]; + if (r->event == SNDRV_TIMER_EVENT_TICK) { + r->tstamp_sec = tstamp.tv_sec; + r->tstamp_nsec = tstamp.tv_nsec; + r->val += ticks; + append++; + break; + } + } + r1.event = SNDRV_TIMER_EVENT_TICK; r1.tstamp_sec = tstamp.tv_sec; r1.tstamp_nsec = tstamp.tv_nsec; - r1.val = resolution; + r1.val = ticks; snd_timer_user_append_to_tqueue(tu, &r1); - tu->last_resolution = resolution; append++; } - if ((tu->filter & (1 << SNDRV_TIMER_EVENT_TICK)) == 0) - goto __wake; - if (ticks == 0) - goto __wake; - if (tu->qused > 0) { - prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; - r = &tu->tqueue[prev]; - if (r->event == SNDRV_TIMER_EVENT_TICK) { - r->tstamp_sec = tstamp.tv_sec; - r->tstamp_nsec = tstamp.tv_nsec; - r->val += ticks; - append++; - goto __wake; - } - } - r1.event = SNDRV_TIMER_EVENT_TICK; - r1.tstamp_sec = tstamp.tv_sec; - r1.tstamp_nsec = tstamp.tv_nsec; - r1.val = ticks; - snd_timer_user_append_to_tqueue(tu, &r1); - append++; - __wake: - spin_unlock(&tu->qlock); if (append == 0) return; snd_kill_fasync(tu->fasync, SIGIO, POLL_IN); @@ -1476,14 +1429,13 @@ static int realloc_user_queue(struct snd_timer_user *tu, int size) return -ENOMEM; } - spin_lock_irq(&tu->qlock); + guard(spinlock_irq)(&tu->qlock); kfree(tu->queue); kfree(tu->tqueue); tu->queue_size = size; tu->queue = queue; tu->tqueue = tqueue; tu->qhead = tu->qtail = tu->qused = 0; - spin_unlock_irq(&tu->qlock); return 0; } @@ -1519,12 +1471,12 @@ static int snd_timer_user_release(struct inode *inode, struct file *file) if (file->private_data) { tu = file->private_data; file->private_data = NULL; - mutex_lock(&tu->ioctl_lock); - if (tu->timeri) { - snd_timer_close(tu->timeri); - snd_timer_instance_free(tu->timeri); + scoped_guard(mutex, &tu->ioctl_lock) { + if (tu->timeri) { + snd_timer_close(tu->timeri); + snd_timer_instance_free(tu->timeri); + } } - mutex_unlock(&tu->ioctl_lock); snd_fasync_free(tu->fasync); kfree(tu->queue); kfree(tu->tqueue); @@ -1559,7 +1511,7 @@ static int snd_timer_user_next_device(struct snd_timer_id __user *_tid) if (copy_from_user(&id, _tid, sizeof(id))) return -EFAULT; - mutex_lock(®ister_mutex); + guard(mutex)(®ister_mutex); if (id.dev_class < 0) { /* first item */ if (list_empty(&snd_timer_list)) snd_timer_user_zero_id(&id); @@ -1636,7 +1588,6 @@ static int snd_timer_user_next_device(struct snd_timer_id __user *_tid) snd_timer_user_zero_id(&id); } } - mutex_unlock(®ister_mutex); if (copy_to_user(_tid, &id, sizeof(*_tid))) return -EFAULT; return 0; @@ -1645,70 +1596,54 @@ static int snd_timer_user_next_device(struct snd_timer_id __user *_tid) static int snd_timer_user_ginfo(struct file *file, struct snd_timer_ginfo __user *_ginfo) { - struct snd_timer_ginfo *ginfo; + struct snd_timer_ginfo *ginfo __free(kfree) = NULL; struct snd_timer_id tid; struct snd_timer *t; struct list_head *p; - int err = 0; ginfo = memdup_user(_ginfo, sizeof(*ginfo)); if (IS_ERR(ginfo)) - return PTR_ERR(ginfo); + return PTR_ERR(no_free_ptr(ginfo)); tid = ginfo->tid; memset(ginfo, 0, sizeof(*ginfo)); ginfo->tid = tid; - mutex_lock(®ister_mutex); + guard(mutex)(®ister_mutex); t = snd_timer_find(&tid); - if (t != NULL) { - ginfo->card = t->card ? t->card->number : -1; - if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) - ginfo->flags |= SNDRV_TIMER_FLG_SLAVE; - strscpy(ginfo->id, t->id, sizeof(ginfo->id)); - strscpy(ginfo->name, t->name, sizeof(ginfo->name)); - spin_lock_irq(&t->lock); + if (!t) + return -ENODEV; + ginfo->card = t->card ? t->card->number : -1; + if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) + ginfo->flags |= SNDRV_TIMER_FLG_SLAVE; + strscpy(ginfo->id, t->id, sizeof(ginfo->id)); + strscpy(ginfo->name, t->name, sizeof(ginfo->name)); + scoped_guard(spinlock_irq, &t->lock) ginfo->resolution = snd_timer_hw_resolution(t); - spin_unlock_irq(&t->lock); - if (t->hw.resolution_min > 0) { - ginfo->resolution_min = t->hw.resolution_min; - ginfo->resolution_max = t->hw.resolution_max; - } - list_for_each(p, &t->open_list_head) { - ginfo->clients++; - } - } else { - err = -ENODEV; + if (t->hw.resolution_min > 0) { + ginfo->resolution_min = t->hw.resolution_min; + ginfo->resolution_max = t->hw.resolution_max; } - mutex_unlock(®ister_mutex); - if (err >= 0 && copy_to_user(_ginfo, ginfo, sizeof(*ginfo))) - err = -EFAULT; - kfree(ginfo); - return err; + list_for_each(p, &t->open_list_head) { + ginfo->clients++; + } + if (copy_to_user(_ginfo, ginfo, sizeof(*ginfo))) + return -EFAULT; + return 0; } static int timer_set_gparams(struct snd_timer_gparams *gparams) { struct snd_timer *t; - int err; - mutex_lock(®ister_mutex); + guard(mutex)(®ister_mutex); t = snd_timer_find(&gparams->tid); - if (!t) { - err = -ENODEV; - goto _error; - } - if (!list_empty(&t->open_list_head)) { - err = -EBUSY; - goto _error; - } - if (!t->hw.set_period) { - err = -ENOSYS; - goto _error; - } - err = t->hw.set_period(t, gparams->period_num, gparams->period_den); -_error: - mutex_unlock(®ister_mutex); - return err; + if (!t) + return -ENODEV; + if (!list_empty(&t->open_list_head)) + return -EBUSY; + if (!t->hw.set_period) + return -ENOSYS; + return t->hw.set_period(t, gparams->period_num, gparams->period_den); } static int snd_timer_user_gparams(struct file *file, @@ -1734,10 +1669,10 @@ static int snd_timer_user_gstatus(struct file *file, tid = gstatus.tid; memset(&gstatus, 0, sizeof(gstatus)); gstatus.tid = tid; - mutex_lock(®ister_mutex); + guard(mutex)(®ister_mutex); t = snd_timer_find(&tid); if (t != NULL) { - spin_lock_irq(&t->lock); + guard(spinlock_irq)(&t->lock); gstatus.resolution = snd_timer_hw_resolution(t); if (t->hw.precise_resolution) { t->hw.precise_resolution(t, &gstatus.resolution_num, @@ -1746,11 +1681,9 @@ static int snd_timer_user_gstatus(struct file *file, gstatus.resolution_num = gstatus.resolution; gstatus.resolution_den = 1000000000uL; } - spin_unlock_irq(&t->lock); } else { err = -ENODEV; } - mutex_unlock(®ister_mutex); if (err >= 0 && copy_to_user(_gstatus, &gstatus, sizeof(gstatus))) err = -EFAULT; return err; @@ -1804,9 +1737,8 @@ static int snd_timer_user_info(struct file *file, struct snd_timer_info __user *_info) { struct snd_timer_user *tu; - struct snd_timer_info *info; + struct snd_timer_info *info __free(kfree) = NULL; struct snd_timer *t; - int err = 0; tu = file->private_data; if (!tu->timeri) @@ -1823,13 +1755,11 @@ static int snd_timer_user_info(struct file *file, info->flags |= SNDRV_TIMER_FLG_SLAVE; strscpy(info->id, t->id, sizeof(info->id)); strscpy(info->name, t->name, sizeof(info->name)); - spin_lock_irq(&t->lock); - info->resolution = snd_timer_hw_resolution(t); - spin_unlock_irq(&t->lock); + scoped_guard(spinlock_irq, &t->lock) + info->resolution = snd_timer_hw_resolution(t); if (copy_to_user(_info, info, sizeof(*_info))) - err = -EFAULT; - kfree(info); - return err; + return -EFAULT; + return 0; } static int snd_timer_user_params(struct file *file, @@ -1887,45 +1817,47 @@ static int snd_timer_user_params(struct file *file, goto _end; } snd_timer_stop(tu->timeri); - spin_lock_irq(&t->lock); - tu->timeri->flags &= ~(SNDRV_TIMER_IFLG_AUTO| - SNDRV_TIMER_IFLG_EXCLUSIVE| - SNDRV_TIMER_IFLG_EARLY_EVENT); - if (params.flags & SNDRV_TIMER_PSFLG_AUTO) - tu->timeri->flags |= SNDRV_TIMER_IFLG_AUTO; - if (params.flags & SNDRV_TIMER_PSFLG_EXCLUSIVE) - tu->timeri->flags |= SNDRV_TIMER_IFLG_EXCLUSIVE; - if (params.flags & SNDRV_TIMER_PSFLG_EARLY_EVENT) - tu->timeri->flags |= SNDRV_TIMER_IFLG_EARLY_EVENT; - spin_unlock_irq(&t->lock); + scoped_guard(spinlock_irq, &t->lock) { + tu->timeri->flags &= ~(SNDRV_TIMER_IFLG_AUTO| + SNDRV_TIMER_IFLG_EXCLUSIVE| + SNDRV_TIMER_IFLG_EARLY_EVENT); + if (params.flags & SNDRV_TIMER_PSFLG_AUTO) + tu->timeri->flags |= SNDRV_TIMER_IFLG_AUTO; + if (params.flags & SNDRV_TIMER_PSFLG_EXCLUSIVE) + tu->timeri->flags |= SNDRV_TIMER_IFLG_EXCLUSIVE; + if (params.flags & SNDRV_TIMER_PSFLG_EARLY_EVENT) + tu->timeri->flags |= SNDRV_TIMER_IFLG_EARLY_EVENT; + } if (params.queue_size > 0 && (unsigned int)tu->queue_size != params.queue_size) { err = realloc_user_queue(tu, params.queue_size); if (err < 0) goto _end; } - spin_lock_irq(&tu->qlock); - tu->qhead = tu->qtail = tu->qused = 0; - if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) { - if (tu->tread) { - struct snd_timer_tread64 tread; - memset(&tread, 0, sizeof(tread)); - tread.event = SNDRV_TIMER_EVENT_EARLY; - tread.tstamp_sec = 0; - tread.tstamp_nsec = 0; - tread.val = 0; - snd_timer_user_append_to_tqueue(tu, &tread); - } else { - struct snd_timer_read *r = &tu->queue[0]; - r->resolution = 0; - r->ticks = 0; - tu->qused++; - tu->qtail++; + scoped_guard(spinlock_irq, &tu->qlock) { + tu->qhead = tu->qtail = tu->qused = 0; + if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) { + if (tu->tread) { + struct snd_timer_tread64 tread; + + memset(&tread, 0, sizeof(tread)); + tread.event = SNDRV_TIMER_EVENT_EARLY; + tread.tstamp_sec = 0; + tread.tstamp_nsec = 0; + tread.val = 0; + snd_timer_user_append_to_tqueue(tu, &tread); + } else { + struct snd_timer_read *r = &tu->queue[0]; + + r->resolution = 0; + r->ticks = 0; + tu->qused++; + tu->qtail++; + } } + tu->filter = params.filter; + tu->ticks = params.ticks; } - tu->filter = params.filter; - tu->ticks = params.ticks; - spin_unlock_irq(&tu->qlock); err = 0; _end: if (copy_to_user(_params, ¶ms, sizeof(params))) @@ -1948,9 +1880,8 @@ static int snd_timer_user_status32(struct file *file, status.resolution = snd_timer_resolution(tu->timeri); status.lost = tu->timeri->lost; status.overrun = tu->overrun; - spin_lock_irq(&tu->qlock); - status.queue = tu->qused; - spin_unlock_irq(&tu->qlock); + scoped_guard(spinlock_irq, &tu->qlock) + status.queue = tu->qused; if (copy_to_user(_status, &status, sizeof(status))) return -EFAULT; return 0; @@ -1971,9 +1902,8 @@ static int snd_timer_user_status64(struct file *file, status.resolution = snd_timer_resolution(tu->timeri); status.lost = tu->timeri->lost; status.overrun = tu->overrun; - spin_lock_irq(&tu->qlock); - status.queue = tu->qused; - spin_unlock_irq(&tu->qlock); + scoped_guard(spinlock_irq, &tu->qlock) + status.queue = tu->qused; if (copy_to_user(_status, &status, sizeof(status))) return -EFAULT; return 0; @@ -2131,12 +2061,9 @@ static long snd_timer_user_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { struct snd_timer_user *tu = file->private_data; - long ret; - mutex_lock(&tu->ioctl_lock); - ret = __snd_timer_user_ioctl(file, cmd, arg, false); - mutex_unlock(&tu->ioctl_lock); - return ret; + guard(mutex)(&tu->ioctl_lock); + return __snd_timer_user_ioctl(file, cmd, arg, false); } static int snd_timer_user_fasync(int fd, struct file * file, int on) @@ -2263,12 +2190,11 @@ static __poll_t snd_timer_user_poll(struct file *file, poll_table * wait) poll_wait(file, &tu->qchange_sleep, wait); mask = 0; - spin_lock_irq(&tu->qlock); + guard(spinlock_irq)(&tu->qlock); if (tu->qused) mask |= EPOLLIN | EPOLLRDNORM; if (tu->disconnected) mask |= EPOLLERR; - spin_unlock_irq(&tu->qlock); return mask; } diff --git a/sound/core/timer_compat.c b/sound/core/timer_compat.c index ee973b7b80..4ae9eaeb5a 100644 --- a/sound/core/timer_compat.c +++ b/sound/core/timer_compat.c @@ -115,10 +115,7 @@ static long snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg) { struct snd_timer_user *tu = file->private_data; - long ret; - mutex_lock(&tu->ioctl_lock); - ret = __snd_timer_user_ioctl_compat(file, cmd, arg); - mutex_unlock(&tu->ioctl_lock); - return ret; + guard(mutex)(&tu->ioctl_lock); + return __snd_timer_user_ioctl_compat(file, cmd, arg); } diff --git a/sound/core/ump.c b/sound/core/ump.c index fe7911498c..117c7ecc48 100644 --- a/sound/core/ump.c +++ b/sound/core/ump.c @@ -685,10 +685,17 @@ static void seq_notify_protocol(struct snd_ump_endpoint *ump) */ int snd_ump_switch_protocol(struct snd_ump_endpoint *ump, unsigned int protocol) { + unsigned int type; + protocol &= ump->info.protocol_caps; if (protocol == ump->info.protocol) return 0; + type = protocol & SNDRV_UMP_EP_INFO_PROTO_MIDI_MASK; + if (type != SNDRV_UMP_EP_INFO_PROTO_MIDI1 && + type != SNDRV_UMP_EP_INFO_PROTO_MIDI2) + return 0; + ump->info.protocol = protocol; ump_dbg(ump, "New protocol = %x (caps = %x)\n", protocol, ump->info.protocol_caps); @@ -985,13 +992,11 @@ static int snd_ump_legacy_open(struct snd_rawmidi_substream *substream) struct snd_ump_endpoint *ump = substream->rmidi->private_data; int dir = substream->stream; int group = ump->legacy_mapping[substream->number]; - int err = 0; + int err; - mutex_lock(&ump->open_mutex); - if (ump->legacy_substreams[dir][group]) { - err = -EBUSY; - goto unlock; - } + guard(mutex)(&ump->open_mutex); + if (ump->legacy_substreams[dir][group]) + return -EBUSY; if (dir == SNDRV_RAWMIDI_STREAM_OUTPUT) { if (!ump->legacy_out_opens) { err = snd_rawmidi_kernel_open(&ump->core, 0, @@ -999,17 +1004,14 @@ static int snd_ump_legacy_open(struct snd_rawmidi_substream *substream) SNDRV_RAWMIDI_LFLG_APPEND, &ump->legacy_out_rfile); if (err < 0) - goto unlock; + return err; } ump->legacy_out_opens++; snd_ump_convert_reset(&ump->out_cvts[group]); } - spin_lock_irq(&ump->legacy_locks[dir]); + guard(spinlock_irq)(&ump->legacy_locks[dir]); ump->legacy_substreams[dir][group] = substream; - spin_unlock_irq(&ump->legacy_locks[dir]); - unlock: - mutex_unlock(&ump->open_mutex); - return err; + return 0; } static int snd_ump_legacy_close(struct snd_rawmidi_substream *substream) @@ -1018,15 +1020,13 @@ static int snd_ump_legacy_close(struct snd_rawmidi_substream *substream) int dir = substream->stream; int group = ump->legacy_mapping[substream->number]; - mutex_lock(&ump->open_mutex); - spin_lock_irq(&ump->legacy_locks[dir]); - ump->legacy_substreams[dir][group] = NULL; - spin_unlock_irq(&ump->legacy_locks[dir]); + guard(mutex)(&ump->open_mutex); + scoped_guard(spinlock_irq, &ump->legacy_locks[dir]) + ump->legacy_substreams[dir][group] = NULL; if (dir == SNDRV_RAWMIDI_STREAM_OUTPUT) { if (!--ump->legacy_out_opens) snd_rawmidi_kernel_release(&ump->legacy_out_rfile); } - mutex_unlock(&ump->open_mutex); return 0; } @@ -1078,12 +1078,11 @@ static int process_legacy_output(struct snd_ump_endpoint *ump, const int dir = SNDRV_RAWMIDI_STREAM_OUTPUT; unsigned char c; int group, size = 0; - unsigned long flags; if (!ump->out_cvts || !ump->legacy_out_opens) return 0; - spin_lock_irqsave(&ump->legacy_locks[dir], flags); + guard(spinlock_irqsave)(&ump->legacy_locks[dir]); for (group = 0; group < SNDRV_UMP_MAX_GROUPS; group++) { substream = ump->legacy_substreams[dir][group]; if (!substream) @@ -1099,7 +1098,6 @@ static int process_legacy_output(struct snd_ump_endpoint *ump, break; } } - spin_unlock_irqrestore(&ump->legacy_locks[dir], flags); return size; } @@ -1109,18 +1107,16 @@ static void process_legacy_input(struct snd_ump_endpoint *ump, const u32 *src, struct snd_rawmidi_substream *substream; unsigned char buf[16]; unsigned char group; - unsigned long flags; const int dir = SNDRV_RAWMIDI_STREAM_INPUT; int size; size = snd_ump_convert_from_ump(src, buf, &group); if (size <= 0) return; - spin_lock_irqsave(&ump->legacy_locks[dir], flags); + guard(spinlock_irqsave)(&ump->legacy_locks[dir]); substream = ump->legacy_substreams[dir][group]; if (substream) snd_rawmidi_receive(substream, buf, size); - spin_unlock_irqrestore(&ump->legacy_locks[dir], flags); } /* Fill ump->legacy_mapping[] for groups to be used for legacy rawmidi */ diff --git a/sound/core/ump_convert.c b/sound/core/ump_convert.c index de04799fdb..f67c44c83f 100644 --- a/sound/core/ump_convert.c +++ b/sound/core/ump_convert.c @@ -404,7 +404,6 @@ static int cvt_legacy_cmd_to_ump(struct ump_cvt_to_ump *cvt, midi2->pg.bank_msb = cc->cc_bank_msb; midi2->pg.bank_lsb = cc->cc_bank_lsb; cc->bank_set = 0; - cc->cc_bank_msb = cc->cc_bank_lsb = 0; } break; case UMP_MSG_STATUS_CHANNEL_PRESSURE: diff --git a/sound/core/vmaster.c b/sound/core/vmaster.c index 378d2c7c3d..04a57f7be6 100644 --- a/sound/core/vmaster.c +++ b/sound/core/vmaster.c @@ -56,7 +56,7 @@ struct link_follower { static int follower_update(struct link_follower *follower) { - struct snd_ctl_elem_value *uctl; + struct snd_ctl_elem_value *uctl __free(kfree) = NULL; int err, ch; uctl = kzalloc(sizeof(*uctl), GFP_KERNEL); @@ -65,18 +65,16 @@ static int follower_update(struct link_follower *follower) uctl->id = follower->follower.id; err = follower->follower.get(&follower->follower, uctl); if (err < 0) - goto error; + return err; for (ch = 0; ch < follower->info.count; ch++) follower->vals[ch] = uctl->value.integer.value[ch]; - error: - kfree(uctl); - return err < 0 ? err : 0; + return 0; } /* get the follower ctl info and save the initial values */ static int follower_init(struct link_follower *follower) { - struct snd_ctl_elem_info *uinfo; + struct snd_ctl_elem_info *uinfo __free(kfree) = NULL; int err; if (follower->info.count) { @@ -91,22 +89,18 @@ static int follower_init(struct link_follower *follower) return -ENOMEM; uinfo->id = follower->follower.id; err = follower->follower.info(&follower->follower, uinfo); - if (err < 0) { - kfree(uinfo); + if (err < 0) return err; - } follower->info.type = uinfo->type; follower->info.count = uinfo->count; if (follower->info.count > 2 || (follower->info.type != SNDRV_CTL_ELEM_TYPE_INTEGER && follower->info.type != SNDRV_CTL_ELEM_TYPE_BOOLEAN)) { pr_err("ALSA: vmaster: invalid follower element\n"); - kfree(uinfo); return -EINVAL; } follower->info.min_val = uinfo->value.integer.min; follower->info.max_val = uinfo->value.integer.max; - kfree(uinfo); return follower_update(follower); } @@ -341,7 +335,7 @@ static int master_get(struct snd_kcontrol *kcontrol, static int sync_followers(struct link_master *master, int old_val, int new_val) { struct link_follower *follower; - struct snd_ctl_elem_value *uval; + struct snd_ctl_elem_value *uval __free(kfree) = NULL; uval = kmalloc(sizeof(*uval), GFP_KERNEL); if (!uval) @@ -353,7 +347,6 @@ static int sync_followers(struct link_master *master, int old_val, int new_val) master->val = new_val; follower_put_val(follower, uval); } - kfree(uval); return 0; } |