summaryrefslogtreecommitdiffstats
path: root/drivers/media/video/uvc/uvc_queue.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/video/uvc/uvc_queue.c')
-rw-r--r--drivers/media/video/uvc/uvc_queue.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/media/video/uvc/uvc_queue.c b/drivers/media/video/uvc/uvc_queue.c
index 0155752e4a5a..f854698c4061 100644
--- a/drivers/media/video/uvc/uvc_queue.c
+++ b/drivers/media/video/uvc/uvc_queue.c
@@ -172,6 +172,20 @@ int uvc_free_buffers(struct uvc_video_queue *queue)
return 0;
}
+/*
+ * Check if buffers have been allocated.
+ */
+int uvc_queue_allocated(struct uvc_video_queue *queue)
+{
+ int allocated;
+
+ mutex_lock(&queue->mutex);
+ allocated = queue->count != 0;
+ mutex_unlock(&queue->mutex);
+
+ return allocated;
+}
+
static void __uvc_query_buffer(struct uvc_buffer *buf,
struct v4l2_buffer *v4l2_buf)
{