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SubjectRe: [PATCH 1/3] media: uvcvideo: Refactor uvc_queue_streamon
Hi Ricardo,

Thank you for the patch.

On Thu, May 22, 2025 at 05:58:46PM +0000, Ricardo Ribalda wrote:
> Do uvc_pm_get before we call uvc_queue_streamon. Although the current
> code is correct, uvc_ioctl_streamon is allways called after uvc_pm_get,
> this change makes the code more resiliant to future changes.
>
> Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
> drivers/media/usb/uvc/uvc_v4l2.c | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
> index 668a4e9d772c6d91f045ca75e2744b3a6c69da6b..862b4e34e5b629cf324479a9bb59ebe8784ccd5d 100644
> --- a/drivers/media/usb/uvc/uvc_v4l2.c
> +++ b/drivers/media/usb/uvc/uvc_v4l2.c
> @@ -853,15 +853,16 @@ static int uvc_ioctl_streamon(struct file *file, void *fh,
> if (handle->is_streaming)
> return 0;
>
> - ret = uvc_queue_streamon(&stream->queue, type);
> + ret = uvc_pm_get(stream->dev);
> if (ret)
> return ret;
>
> - ret = uvc_pm_get(stream->dev);
> + ret = uvc_queue_streamon(&stream->queue, type);
> if (ret) {
> - uvc_queue_streamoff(&stream->queue, type);
> + uvc_pm_put(stream->dev);
> return ret;
> }
> +
> handle->is_streaming = true;
>
> return 0;

--
Regards,

Laurent Pinchart

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