drm/virtio: annotate virtio_gpu_queue_ctrl_buffer_locked

virtio_gpu_queue_ctrl_buffer_locked is called with ctrlq.qlock taken, it
releases and acquires this lock. This causes a sparse warning. Add
appropriate annotations for sparse context checking.

Signed-off-by: Michael S. Tsirkin <[e-mail]>

drivers/gpu/drm/virtio/virtgpu_vq.c

···
 
 static int virtio_gpu_queue_ctrl_buffer_locked(struct virtio_gpu_device *vgdev,
 					       struct virtio_gpu_vbuffer *vbuf)
+		__releases(&vgdev->ctrlq.qlock)
+		__acquires(&vgdev->ctrlq.qlock)
 {
 	struct virtqueue *vq = vgdev->ctrlq.vq;
 	struct scatterlist *sgs[3], vcmd, vout, vresp;