[media] v4l: omap4iss: Restore irq flags correctly in omap4iss_video_buffer_next()

[Dan Carpenter <dan.carpenter@oracle.com>]

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.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

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,