[media] uvc: Add return code check at vb2_queue_init()

This function returns an integer and it's mandatory
to check the return code.

Signed-off-by: Ezequiel Garcia <elezegarcia@gmail.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/usb/uvc/uvc_queue.c b/drivers/media/usb/uvc/uvc_queue.c
index 5577381..18a91fa 100644 (file)
--- a/drivers/media/usb/uvc/uvc_queue.c
+++ b/drivers/media/usb/uvc/uvc_queue.c
@@ -122,21 +122,27 @@ static struct vb2_ops uvc_queue_qops = {
        .buf_finish = uvc_buffer_finish,
 };
 
-void uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type,
+int uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type,
                    int drop_corrupted)
 {
+       int ret;
+
        queue->queue.type = type;
        queue->queue.io_modes = VB2_MMAP | VB2_USERPTR;
        queue->queue.drv_priv = queue;
        queue->queue.buf_struct_size = sizeof(struct uvc_buffer);
        queue->queue.ops = &uvc_queue_qops;
        queue->queue.mem_ops = &vb2_vmalloc_memops;
-       vb2_queue_init(&queue->queue);
+       ret = vb2_queue_init(&queue->queue);
+       if (ret)
+               return ret;
 
        mutex_init(&queue->mutex);
        spin_lock_init(&queue->irqlock);
        INIT_LIST_HEAD(&queue->irqqueue);
        queue->flags = drop_corrupted ? UVC_QUEUE_DROP_CORRUPTED : 0;
+
+       return 0;
 }
 
 /* -----------------------------------------------------------------------------

diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c
index 1c15b42..57c3076 100644 (file)
--- a/drivers/media/usb/uvc/uvc_video.c
+++ b/drivers/media/usb/uvc/uvc_video.c
@@ -1755,7 +1755,9 @@ int uvc_video_init(struct uvc_streaming *stream)
        atomic_set(&stream->active, 0);
 
        /* Initialize the video buffers queue. */
-       uvc_queue_init(&stream->queue, stream->type, !uvc_no_drop_param);
+       ret = uvc_queue_init(&stream->queue, stream->type, !uvc_no_drop_param);
+       if (ret)
+               return ret;
 
        /* Alternate setting 0 should be the default, yet the XBox Live Vision
         * Cam (and possibly other devices) crash or otherwise misbehave if

diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index 3764040..af216ec 100644 (file)
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -600,7 +600,7 @@ extern struct uvc_driver uvc_driver;
 extern struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id);
 
 /* Video buffers queue management. */
-extern void uvc_queue_init(struct uvc_video_queue *queue,
+extern int uvc_queue_init(struct uvc_video_queue *queue,
                enum v4l2_buf_type type, int drop_corrupted);
 extern int uvc_alloc_buffers(struct uvc_video_queue *queue,
                struct v4l2_requestbuffers *rb);