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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2010-11-21 14:46:44 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2010-12-01 20:10:22 -0200
commit8e815e1763b8d4e5adf0dc14bde8c55329cf95a8 (patch)
tree517994a565f567d1317ba86222f3a64ffd8c042b /drivers
parent23d9f3ef23f0dc4bb20ccd5540b9a91ff08da08f (diff)
[media] uvcvideo: Move mutex lock/unlock inside uvc_free_buffers
Callers outside uvc_queue.c should not be forced to lock/unlock the queue mutex manually. Move the mutex operations inside uvc_free_buffers(). Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/media/video/uvc/uvc_queue.c57
-rw-r--r--drivers/media/video/uvc/uvc_v4l2.c2
2 files changed, 34 insertions, 25 deletions
diff --git a/drivers/media/video/uvc/uvc_queue.c b/drivers/media/video/uvc/uvc_queue.c
index ed6d5449741c..32c18229863b 100644
--- a/drivers/media/video/uvc/uvc_queue.c
+++ b/drivers/media/video/uvc/uvc_queue.c
@@ -90,6 +90,39 @@ void uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type,
}
/*
+ * Free the video buffers.
+ *
+ * This function must be called with the queue lock held.
+ */
+static int __uvc_free_buffers(struct uvc_video_queue *queue)
+{
+ unsigned int i;
+
+ for (i = 0; i < queue->count; ++i) {
+ if (queue->buffer[i].vma_use_count != 0)
+ return -EBUSY;
+ }
+
+ if (queue->count) {
+ vfree(queue->mem);
+ queue->count = 0;
+ }
+
+ return 0;
+}
+
+int uvc_free_buffers(struct uvc_video_queue *queue)
+{
+ int ret;
+
+ mutex_lock(&queue->mutex);
+ ret = __uvc_free_buffers(queue);
+ mutex_unlock(&queue->mutex);
+
+ return ret;
+}
+
+/*
* Allocate the video buffers.
*
* Pages are reserved to make sure they will not be swapped, as they will be
@@ -110,7 +143,7 @@ int uvc_alloc_buffers(struct uvc_video_queue *queue, unsigned int nbuffers,
mutex_lock(&queue->mutex);
- if ((ret = uvc_free_buffers(queue)) < 0)
+ if ((ret = __uvc_free_buffers(queue)) < 0)
goto done;
/* Bail out if no buffers should be allocated. */
@@ -152,28 +185,6 @@ done:
}
/*
- * Free the video buffers.
- *
- * This function must be called with the queue lock held.
- */
-int uvc_free_buffers(struct uvc_video_queue *queue)
-{
- unsigned int i;
-
- for (i = 0; i < queue->count; ++i) {
- if (queue->buffer[i].vma_use_count != 0)
- return -EBUSY;
- }
-
- if (queue->count) {
- vfree(queue->mem);
- queue->count = 0;
- }
-
- return 0;
-}
-
-/*
* Check if buffers have been allocated.
*/
int uvc_queue_allocated(struct uvc_video_queue *queue)
diff --git a/drivers/media/video/uvc/uvc_v4l2.c b/drivers/media/video/uvc/uvc_v4l2.c
index 0f865e97cf48..0fd9848bd9d7 100644
--- a/drivers/media/video/uvc/uvc_v4l2.c
+++ b/drivers/media/video/uvc/uvc_v4l2.c
@@ -494,11 +494,9 @@ static int uvc_v4l2_release(struct file *file)
if (uvc_has_privileges(handle)) {
uvc_video_enable(stream, 0);
- mutex_lock(&stream->queue.mutex);
if (uvc_free_buffers(&stream->queue) < 0)
uvc_printk(KERN_ERR, "uvc_v4l2_release: Unable to "
"free buffers.\n");
- mutex_unlock(&stream->queue.mutex);
}
/* Release the file handle. */

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