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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /sound/core/hwdep_compat.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sound/core/hwdep_compat.c')
-rw-r--r-- | sound/core/hwdep_compat.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/sound/core/hwdep_compat.c b/sound/core/hwdep_compat.c new file mode 100644 index 000000000..a0b76706c --- /dev/null +++ b/sound/core/hwdep_compat.c @@ -0,0 +1,55 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * 32bit -> 64bit ioctl wrapper for hwdep API + * Copyright (c) by Takashi Iwai <tiwai@suse.de> + */ + +/* This file is included from hwdep.c */ + +#include <linux/compat.h> + +struct snd_hwdep_dsp_image32 { + u32 index; + unsigned char name[64]; + u32 image; /* pointer */ + u32 length; + u32 driver_data; +} /* don't set packed attribute here */; + +static int snd_hwdep_dsp_load_compat(struct snd_hwdep *hw, + struct snd_hwdep_dsp_image32 __user *src) +{ + struct snd_hwdep_dsp_image info = {}; + compat_caddr_t ptr; + + if (copy_from_user(&info, src, 4 + 64) || + get_user(ptr, &src->image) || + get_user(info.length, &src->length) || + get_user(info.driver_data, &src->driver_data)) + return -EFAULT; + info.image = compat_ptr(ptr); + + return snd_hwdep_dsp_load(hw, &info); +} + +enum { + SNDRV_HWDEP_IOCTL_DSP_LOAD32 = _IOW('H', 0x03, struct snd_hwdep_dsp_image32) +}; + +static long snd_hwdep_ioctl_compat(struct file * file, unsigned int cmd, + unsigned long arg) +{ + struct snd_hwdep *hw = file->private_data; + void __user *argp = compat_ptr(arg); + switch (cmd) { + case SNDRV_HWDEP_IOCTL_PVERSION: + case SNDRV_HWDEP_IOCTL_INFO: + case SNDRV_HWDEP_IOCTL_DSP_STATUS: + return snd_hwdep_ioctl(file, cmd, (unsigned long)argp); + case SNDRV_HWDEP_IOCTL_DSP_LOAD32: + return snd_hwdep_dsp_load_compat(hw, argp); + } + if (hw->ops.ioctl_compat) + return hw->ops.ioctl_compat(hw, file, cmd, arg); + return -ENOIOCTLCMD; +} |