[media] uvcvideo: Rename and split uvc_queue_enable to uvc_queue_stream(on|off)

This brings the function name in line with the V4L2 API terminology and
allows removing the duplicate queue type check.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/usb/uvc/uvc_driver.c

@@ -2038,7 +2038,8 @@ static int __uvc_resume(struct usb_interface *intf, int reset)
 		if (stream->intf == intf) {
 			ret = uvc_video_resume(stream, reset);
 			if (ret < 0)
-				uvc_queue_enable(&stream->queue, 0);
+				uvc_queue_streamoff(&stream->queue,
+						    stream->queue.queue.type);
 			return ret;
 		}
 	}

drivers/media/usb/uvc/uvc_queue.c

@@ -263,6 +263,28 @@ int uvc_dequeue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf,
 	return ret;
 }
 
+int uvc_queue_streamon(struct uvc_video_queue *queue, enum v4l2_buf_type type)
+{
+	int ret;
+
+	mutex_lock(&queue->mutex);
+	ret = vb2_streamon(&queue->queue, type);
+	mutex_unlock(&queue->mutex);
+
+	return ret;
+}
+
+int uvc_queue_streamoff(struct uvc_video_queue *queue, enum v4l2_buf_type type)
+{
+	int ret;
+
+	mutex_lock(&queue->mutex);
+	ret = vb2_streamoff(&queue->queue, type);
+	mutex_unlock(&queue->mutex);
+
+	return ret;
+}
+
 int uvc_queue_mmap(struct uvc_video_queue *queue, struct vm_area_struct *vma)
 {
 	int ret;
@@ -317,37 +339,6 @@ int uvc_queue_allocated(struct uvc_video_queue *queue)
 	return allocated;
 }
 
-/*
- * Enable or disable the video buffers queue.
- *
- * The queue must be enabled before starting video acquisition and must be
- * disabled after stopping it. This ensures that the video buffers queue
- * state can be properly initialized before buffers are accessed from the
- * interrupt handler.
- *
- * Enabling the video queue returns -EBUSY if the queue is already enabled.
- *
- * Disabling the video queue cancels the queue and removes all buffers from
- * the main queue.
- *
- * This function can't be called from interrupt context. Use
- * uvc_queue_cancel() instead.
- */
-int uvc_queue_enable(struct uvc_video_queue *queue, int enable)
-{
-	int ret;
-
-	mutex_lock(&queue->mutex);
-
-	if (enable)
-		ret = vb2_streamon(&queue->queue, queue->queue.type);
-	else
-		ret = vb2_streamoff(&queue->queue, queue->queue.type);
-
-	mutex_unlock(&queue->mutex);
-	return ret;
-}
-
 /*
  * Cancel the video buffers queue.
  *

drivers/media/usb/uvc/uvc_v4l2.c

@@ -757,14 +757,11 @@ static int uvc_ioctl_streamon(struct file *file, void *fh,
 	struct uvc_streaming *stream = handle->stream;
 	int ret;
 
-	if (type != stream->type)
-		return -EINVAL;
-
 	if (!uvc_has_privileges(handle))
 		return -EBUSY;
 
 	mutex_lock(&stream->mutex);
-	ret = uvc_queue_enable(&stream->queue, 1);
+	ret = uvc_queue_streamon(&stream->queue, type);
 	mutex_unlock(&stream->mutex);
 
 	return ret;
@@ -776,14 +773,11 @@ static int uvc_ioctl_streamoff(struct file *file, void *fh,
 	struct uvc_fh *handle = fh;
 	struct uvc_streaming *stream = handle->stream;
 
-	if (type != stream->type)
-		return -EINVAL;
-
 	if (!uvc_has_privileges(handle))
 		return -EBUSY;
 
 	mutex_lock(&stream->mutex);
-	uvc_queue_enable(&stream->queue, 0);
+	uvc_queue_streamoff(&stream->queue, type);
 	mutex_unlock(&stream->mutex);
 
 	return 0;

drivers/media/usb/uvc/uvcvideo.h

@@ -634,7 +634,10 @@ extern int uvc_queue_buffer(struct uvc_video_queue *queue,
 		struct v4l2_buffer *v4l2_buf);
 extern int uvc_dequeue_buffer(struct uvc_video_queue *queue,
 		struct v4l2_buffer *v4l2_buf, int nonblocking);
-extern int uvc_queue_enable(struct uvc_video_queue *queue, int enable);
+extern int uvc_queue_streamon(struct uvc_video_queue *queue,
+			      enum v4l2_buf_type type);
+extern int uvc_queue_streamoff(struct uvc_video_queue *queue,
+			       enum v4l2_buf_type type);
 extern void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);
 extern struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
 		struct uvc_buffer *buf);