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media: video-i2c: fix buffer queue ordering

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Queued buffers are added to the tail of vid_cap_active in
buffer_queue(), but the capture kthread also retrieves buffers from
the tail of the list.

This makes the queue behave as LIFO instead of FIFO when multiple
buffers are queued.

Fix this by retrieving buffers from the head of the list.

Signed-off-by: Arash Golgol <arash.golgol@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
This commit is contained in:
Arash Golgol 2026-05-10 07:04:23 +03:30 committed by Hans Verkuil
parent 56384b486b
commit bc4574c265
1 changed files with 3 additions and 2 deletions
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5
drivers/media/i2c/video-i2c.c
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@ -454,8 +454,9 @@ static int video_i2c_thread_vid_cap(void *priv)
spin_lock(&data->slock);
if (!list_empty(&data->vid_cap_active)) {
vid_cap_buf = list_last_entry(&data->vid_cap_active,
struct video_i2c_buffer, list);
vid_cap_buf = list_first_entry(&data->vid_cap_active,
struct video_i2c_buffer,
list);
list_del(&vid_cap_buf->list);
}