Hi Dan,
Thank you for the patch.
On Monday 16 December 2013 18:06:12 Dan Carpenter wrote:
> The spin_lock_irqsave() macro is not nestable. The second call will
> overwrite the first record of "flags" so the IRQs will not be enabled
> correctly at the end of the function.
>
> I haven't looked at all the callers but it could be that this function
> is always called with interrupts disabled and the bug doesn't cause
> problems in real life.
The function is called from interrupt handlers only. Would you like to
rephrase the commit message accordingly ?
> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
>
> diff --git a/drivers/staging/media/omap4iss/iss_video.c
> b/drivers/staging/media/omap4iss/iss_video.c index
> 766491e6a8d0..c9b71c750b15 100644
> --- a/drivers/staging/media/omap4iss/iss_video.c
> +++ b/drivers/staging/media/omap4iss/iss_video.c
> @@ -451,9 +451,9 @@ struct iss_buffer *omap4iss_video_buffer_next(struct
> iss_video *video) }
>
> if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input != NULL) {
> - spin_lock_irqsave(&pipe->lock, flags);
> + spin_lock(&pipe->lock);
> pipe->state &= ~ISS_PIPELINE_STREAM;
> - spin_unlock_irqrestore(&pipe->lock, flags);
> + spin_unlock(&pipe->lock);
> }
>
> buf = list_first_entry(&video->dmaqueue, struct iss_buffer,
--
Regards,
Laurent Pinchart
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