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-rw-r--r--drivers/media/usb/dvb-usb/az6027.c4
-rw-r--r--drivers/media/usb/dvb-usb/dvb-usb-init.c4
-rw-r--r--drivers/media/usb/siano/smsusb.c1
-rw-r--r--drivers/media/usb/uvc/uvc_ctrl.c30
-rw-r--r--drivers/media/usb/uvc/uvc_driver.c48
-rw-r--r--drivers/media/usb/uvc/uvc_entity.c2
-rw-r--r--drivers/media/usb/uvc/uvc_status.c40
-rw-r--r--drivers/media/usb/uvc/uvc_video.c4
-rw-r--r--drivers/media/usb/uvc/uvcvideo.h5
9 files changed, 94 insertions, 44 deletions
diff --git a/drivers/media/usb/dvb-usb/az6027.c b/drivers/media/usb/dvb-usb/az6027.c
index 990719727..7d71ac781 100644
--- a/drivers/media/usb/dvb-usb/az6027.c
+++ b/drivers/media/usb/dvb-usb/az6027.c
@@ -978,6 +978,10 @@ static int az6027_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[], int n
if (msg[i].addr == 0x99) {
req = 0xBE;
index = 0;
+ if (msg[i].len < 1) {
+ i = -EOPNOTSUPP;
+ break;
+ }
value = msg[i].buf[0] & 0x00ff;
length = 1;
az6027_usb_out_op(d, req, value, index, data, length);
diff --git a/drivers/media/usb/dvb-usb/dvb-usb-init.c b/drivers/media/usb/dvb-usb/dvb-usb-init.c
index 4b1445d80..16be32b19 100644
--- a/drivers/media/usb/dvb-usb/dvb-usb-init.c
+++ b/drivers/media/usb/dvb-usb/dvb-usb-init.c
@@ -84,7 +84,7 @@ static int dvb_usb_adapter_init(struct dvb_usb_device *d, short *adapter_nrs)
ret = dvb_usb_adapter_stream_init(adap);
if (ret)
- return ret;
+ goto stream_init_err;
ret = dvb_usb_adapter_dvb_init(adap, adapter_nrs);
if (ret)
@@ -117,6 +117,8 @@ frontend_init_err:
dvb_usb_adapter_dvb_exit(adap);
dvb_init_err:
dvb_usb_adapter_stream_exit(adap);
+stream_init_err:
+ kfree(adap->priv);
return ret;
}
diff --git a/drivers/media/usb/siano/smsusb.c b/drivers/media/usb/siano/smsusb.c
index 3071d9bc7..2df3d730e 100644
--- a/drivers/media/usb/siano/smsusb.c
+++ b/drivers/media/usb/siano/smsusb.c
@@ -190,6 +190,7 @@ static void smsusb_stop_streaming(struct smsusb_device_t *dev)
for (i = 0; i < MAX_URBS; i++) {
usb_kill_urb(&dev->surbs[i].urb);
+ cancel_work_sync(&dev->surbs[i].wq);
if (dev->surbs[i].cb) {
smscore_putbuffer(dev->coredev, dev->surbs[i].cb);
diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
index cb6046481..84b1339c2 100644
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -11,6 +11,7 @@
*
*/
+#include <asm/barrier.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/module.h>
@@ -1280,17 +1281,12 @@ static void uvc_ctrl_send_slave_event(struct uvc_video_chain *chain,
uvc_ctrl_send_event(chain, handle, ctrl, mapping, val, changes);
}
-static void uvc_ctrl_status_event_work(struct work_struct *work)
+void uvc_ctrl_status_event(struct uvc_video_chain *chain,
+ struct uvc_control *ctrl, const u8 *data)
{
- struct uvc_device *dev = container_of(work, struct uvc_device,
- async_ctrl.work);
- struct uvc_ctrl_work *w = &dev->async_ctrl;
- struct uvc_video_chain *chain = w->chain;
struct uvc_control_mapping *mapping;
- struct uvc_control *ctrl = w->ctrl;
struct uvc_fh *handle;
unsigned int i;
- int ret;
mutex_lock(&chain->ctrl_mutex);
@@ -1298,7 +1294,7 @@ static void uvc_ctrl_status_event_work(struct work_struct *work)
ctrl->handle = NULL;
list_for_each_entry(mapping, &ctrl->info.mappings, list) {
- s32 value = __uvc_ctrl_get_value(mapping, w->data);
+ s32 value = __uvc_ctrl_get_value(mapping, data);
/*
* handle may be NULL here if the device sends auto-update
@@ -1317,6 +1313,20 @@ static void uvc_ctrl_status_event_work(struct work_struct *work)
}
mutex_unlock(&chain->ctrl_mutex);
+}
+
+static void uvc_ctrl_status_event_work(struct work_struct *work)
+{
+ struct uvc_device *dev = container_of(work, struct uvc_device,
+ async_ctrl.work);
+ struct uvc_ctrl_work *w = &dev->async_ctrl;
+ int ret;
+
+ uvc_ctrl_status_event(w->chain, w->ctrl, w->data);
+
+ /* The barrier is needed to synchronize with uvc_status_stop(). */
+ if (smp_load_acquire(&dev->flush_status))
+ return;
/* Resubmit the URB. */
w->urb->interval = dev->int_ep->desc.bInterval;
@@ -1326,8 +1336,8 @@ static void uvc_ctrl_status_event_work(struct work_struct *work)
ret);
}
-bool uvc_ctrl_status_event(struct urb *urb, struct uvc_video_chain *chain,
- struct uvc_control *ctrl, const u8 *data)
+bool uvc_ctrl_status_event_async(struct urb *urb, struct uvc_video_chain *chain,
+ struct uvc_control *ctrl, const u8 *data)
{
struct uvc_device *dev = chain->dev;
struct uvc_ctrl_work *w = &dev->async_ctrl;
diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 998ce7129..775d67720 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -1033,10 +1033,8 @@ static int uvc_parse_vendor_control(struct uvc_device *dev,
+ n;
memcpy(unit->extension.bmControls, &buffer[23+p], 2*n);
- if (buffer[24+p+2*n] != 0)
- usb_string(udev, buffer[24+p+2*n], unit->name,
- sizeof(unit->name));
- else
+ if (buffer[24+p+2*n] == 0 ||
+ usb_string(udev, buffer[24+p+2*n], unit->name, sizeof(unit->name)) < 0)
sprintf(unit->name, "Extension %u", buffer[3]);
list_add_tail(&unit->list, &dev->entities);
@@ -1161,15 +1159,15 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
memcpy(term->media.bmTransportModes, &buffer[10+n], p);
}
- if (buffer[7] != 0)
- usb_string(udev, buffer[7], term->name,
- sizeof(term->name));
- else if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA)
- sprintf(term->name, "Camera %u", buffer[3]);
- else if (UVC_ENTITY_TYPE(term) == UVC_ITT_MEDIA_TRANSPORT_INPUT)
- sprintf(term->name, "Media %u", buffer[3]);
- else
- sprintf(term->name, "Input %u", buffer[3]);
+ if (buffer[7] == 0 ||
+ usb_string(udev, buffer[7], term->name, sizeof(term->name)) < 0) {
+ if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA)
+ sprintf(term->name, "Camera %u", buffer[3]);
+ if (UVC_ENTITY_TYPE(term) == UVC_ITT_MEDIA_TRANSPORT_INPUT)
+ sprintf(term->name, "Media %u", buffer[3]);
+ else
+ sprintf(term->name, "Input %u", buffer[3]);
+ }
list_add_tail(&term->list, &dev->entities);
break;
@@ -1201,10 +1199,8 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
memcpy(term->baSourceID, &buffer[7], 1);
- if (buffer[8] != 0)
- usb_string(udev, buffer[8], term->name,
- sizeof(term->name));
- else
+ if (buffer[8] == 0 ||
+ usb_string(udev, buffer[8], term->name, sizeof(term->name)) < 0)
sprintf(term->name, "Output %u", buffer[3]);
list_add_tail(&term->list, &dev->entities);
@@ -1226,10 +1222,8 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
memcpy(unit->baSourceID, &buffer[5], p);
- if (buffer[5+p] != 0)
- usb_string(udev, buffer[5+p], unit->name,
- sizeof(unit->name));
- else
+ if (buffer[5+p] == 0 ||
+ usb_string(udev, buffer[5+p], unit->name, sizeof(unit->name)) < 0)
sprintf(unit->name, "Selector %u", buffer[3]);
list_add_tail(&unit->list, &dev->entities);
@@ -1259,10 +1253,8 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
if (dev->uvc_version >= 0x0110)
unit->processing.bmVideoStandards = buffer[9+n];
- if (buffer[8+n] != 0)
- usb_string(udev, buffer[8+n], unit->name,
- sizeof(unit->name));
- else
+ if (buffer[8+n] == 0 ||
+ usb_string(udev, buffer[8+n], unit->name, sizeof(unit->name)) < 0)
sprintf(unit->name, "Processing %u", buffer[3]);
list_add_tail(&unit->list, &dev->entities);
@@ -1290,10 +1282,8 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
unit->extension.bmControls = (u8 *)unit + sizeof(*unit);
memcpy(unit->extension.bmControls, &buffer[23+p], n);
- if (buffer[23+p+n] != 0)
- usb_string(udev, buffer[23+p+n], unit->name,
- sizeof(unit->name));
- else
+ if (buffer[23+p+n] == 0 ||
+ usb_string(udev, buffer[23+p+n], unit->name, sizeof(unit->name)) < 0)
sprintf(unit->name, "Extension %u", buffer[3]);
list_add_tail(&unit->list, &dev->entities);
diff --git a/drivers/media/usb/uvc/uvc_entity.c b/drivers/media/usb/uvc/uvc_entity.c
index f2457953f..0d5aaaa7e 100644
--- a/drivers/media/usb/uvc/uvc_entity.c
+++ b/drivers/media/usb/uvc/uvc_entity.c
@@ -42,7 +42,7 @@ static int uvc_mc_create_links(struct uvc_video_chain *chain,
continue;
remote = uvc_entity_by_id(chain->dev, entity->baSourceID[i]);
- if (remote == NULL)
+ if (remote == NULL || remote->num_pads == 0)
return -EINVAL;
source = (UVC_ENTITY_TYPE(remote) == UVC_TT_STREAMING)
diff --git a/drivers/media/usb/uvc/uvc_status.c b/drivers/media/usb/uvc/uvc_status.c
index 883e4cab4..141ac1ffb 100644
--- a/drivers/media/usb/uvc/uvc_status.c
+++ b/drivers/media/usb/uvc/uvc_status.c
@@ -11,6 +11,7 @@
*
*/
+#include <asm/barrier.h>
#include <linux/kernel.h>
#include <linux/input.h>
#include <linux/slab.h>
@@ -184,7 +185,8 @@ static bool uvc_event_control(struct urb *urb,
switch (status->bAttribute) {
case UVC_CTRL_VALUE_CHANGE:
- return uvc_ctrl_status_event(urb, chain, ctrl, status->bValue);
+ return uvc_ctrl_status_event_async(urb, chain, ctrl,
+ status->bValue);
case UVC_CTRL_INFO_CHANGE:
case UVC_CTRL_FAILURE_CHANGE:
@@ -314,5 +316,41 @@ int uvc_status_start(struct uvc_device *dev, gfp_t flags)
void uvc_status_stop(struct uvc_device *dev)
{
+ struct uvc_ctrl_work *w = &dev->async_ctrl;
+
+ /*
+ * Prevent the asynchronous control handler from requeing the URB. The
+ * barrier is needed so the flush_status change is visible to other
+ * CPUs running the asynchronous handler before usb_kill_urb() is
+ * called below.
+ */
+ smp_store_release(&dev->flush_status, true);
+
+ /*
+ * Cancel any pending asynchronous work. If any status event was queued,
+ * process it synchronously.
+ */
+ if (cancel_work_sync(&w->work))
+ uvc_ctrl_status_event(w->chain, w->ctrl, w->data);
+
+ /* Kill the urb. */
usb_kill_urb(dev->int_urb);
+
+ /*
+ * The URB completion handler may have queued asynchronous work. This
+ * won't resubmit the URB as flush_status is set, but it needs to be
+ * cancelled before returning or it could then race with a future
+ * uvc_status_start() call.
+ */
+ if (cancel_work_sync(&w->work))
+ uvc_ctrl_status_event(w->chain, w->ctrl, w->data);
+
+ /*
+ * From this point, there are no events on the queue and the status URB
+ * is dead. No events will be queued until uvc_status_start() is called.
+ * The barrier is needed to make sure that flush_status is visible to
+ * uvc_ctrl_status_event_work() when uvc_status_start() will be called
+ * again.
+ */
+ smp_store_release(&dev->flush_status, false);
}
diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c
index b431f06d5..1c0249df5 100644
--- a/drivers/media/usb/uvc/uvc_video.c
+++ b/drivers/media/usb/uvc/uvc_video.c
@@ -1278,7 +1278,9 @@ static void uvc_video_decode_meta(struct uvc_streaming *stream,
if (has_scr)
memcpy(stream->clock.last_scr, scr, 6);
- memcpy(&meta->length, mem, length);
+ meta->length = mem[0];
+ meta->flags = mem[1];
+ memcpy(meta->buf, &mem[2], length - 2);
meta_buf->bytesused += length + sizeof(meta->ns) + sizeof(meta->sof);
uvc_trace(UVC_TRACE_FRAME,
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index 839ba3cc5..e8b06164b 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -603,6 +603,7 @@ struct uvc_device {
/* Status Interrupt Endpoint */
struct usb_host_endpoint *int_ep;
struct urb *int_urb;
+ bool flush_status;
u8 *status;
struct input_dev *input;
char input_phys[64];
@@ -768,7 +769,9 @@ int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
int uvc_ctrl_init_device(struct uvc_device *dev);
void uvc_ctrl_cleanup_device(struct uvc_device *dev);
int uvc_ctrl_restore_values(struct uvc_device *dev);
-bool uvc_ctrl_status_event(struct urb *urb, struct uvc_video_chain *chain,
+bool uvc_ctrl_status_event_async(struct urb *urb, struct uvc_video_chain *chain,
+ struct uvc_control *ctrl, const u8 *data);
+void uvc_ctrl_status_event(struct uvc_video_chain *chain,
struct uvc_control *ctrl, const u8 *data);
int uvc_ctrl_begin(struct uvc_video_chain *chain);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 03:56:07 +0000