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media: usb: uvcvideo: Store v4l2_fh pointer in file->private_data

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Most V4L2 drivers store the v4l2_fh pointer in file->private_data. The
uvcvideo driver instead stores the pointer to the driver-specific
structure that embeds the v4l2_fh. Switch to storing the v4l2_fh pointer
itself to standardize behaviour across drivers. This also prepares for
future refactoring that depends on v4l2_fh being stored in private_data.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
This commit is contained in:
Laurent Pinchart 2025-08-10 04:29:48 +03:00 committed by Hans Verkuil
parent 4a538a1c5f
commit 7b6cf051df
2 changed files with 10 additions and 5 deletions
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10
drivers/media/usb/uvc/uvc_v4l2.c
View File

@ -603,14 +603,14 @@ static int uvc_v4l2_open(struct file *file)
v4l2_fh_add(&handle->vfh);
handle->chain = stream->chain;
handle->stream = stream;
file->private_data = handle;
file->private_data = &handle->vfh;
return 0;
}
static int uvc_v4l2_release(struct file *file)
{
struct uvc_fh *handle = file->private_data;
struct uvc_fh *handle = to_uvc_fh(file);
struct uvc_streaming *stream = handle->stream;
uvc_dbg(stream->dev, CALLS, "%s\n", __func__);
@ -626,7 +626,7 @@ static int uvc_v4l2_release(struct file *file)
static int uvc_ioctl_querycap(struct file *file, void *fh,
struct v4l2_capability *cap)
{
struct uvc_fh *handle = file->private_data;
struct uvc_fh *handle = to_uvc_fh(file);
struct uvc_video_chain *chain = handle->chain;
struct uvc_streaming *stream = handle->stream;
@ -1170,7 +1170,7 @@ static int uvc_v4l2_put_xu_query(const struct uvc_xu_control_query *kp,
static long uvc_v4l2_compat_ioctl32(struct file *file,
unsigned int cmd, unsigned long arg)
{
struct uvc_fh *handle = file->private_data;
struct uvc_fh *handle = to_uvc_fh(file);
union {
struct uvc_xu_control_mapping xmap;
struct uvc_xu_control_query xqry;
@ -1221,7 +1221,7 @@ static long uvc_v4l2_compat_ioctl32(struct file *file,
static long uvc_v4l2_unlocked_ioctl(struct file *file,
unsigned int cmd, unsigned long arg)
{
struct uvc_fh *handle = file->private_data;
struct uvc_fh *handle = to_uvc_fh(file);
unsigned int converted_cmd = v4l2_translate_cmd(cmd);
int ret;

5
drivers/media/usb/uvc/uvcvideo.h
View File

@ -637,6 +637,11 @@ struct uvc_fh {
unsigned int pending_async_ctrls;
};
static inline struct uvc_fh *to_uvc_fh(struct file *filp)
{
return container_of(filp->private_data, struct uvc_fh, vfh);
}
/* ------------------------------------------------------------------------
* Debugging, printing and logging
*/