Re: [PATCH v2] media: uvcvideo: Return queued buffers on start_streaming() failure

[Michal Pecio <michal.pecio@gmail.com>]

On Thu, 13 Nov 2025 23:40:56 +0200, Laurent Pinchart wrote:
> From: Michal Pecio <michal.pecio@gmail.com>
> 
> Return buffers if streaming fails to start due to uvc_pm_get() error.
> 
> This bug may be responsible for a warning I got running
> 
>     while :; do yavta -c3 /dev/video0; done
> 
> on an xHCI controller which failed under this workload.
> I had no luck reproducing this warning again to confirm.
> 
> xhci_hcd 0000:09:00.0: HC died; cleaning up
> usb 13-2: USB disconnect, device number 2
> WARNING: CPU: 2 PID: 29386 at drivers/media/common/videobuf2/videobuf2-core.c:1803 vb2_start_streaming+0xac/0x120
> 
> Fixes: 7dd56c47784a ("media: uvcvideo: Remove stream->is_streaming field")
> Cc: stable@vger.kernel.org
> Signed-off-by: Michal Pecio <michal.pecio@gmail.com>
> Reviewed-by: Ricardo Ribalda <ribalda@chromium.org>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Link: https://patch.msgid.link/20251015133642.3dede646.michal.pecio@gmail.com
> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> ---
> Changes since v1:
> 
> - Reorganize error path

Look alright, thanks for taking the patch.