drm/virtio: ratelimit error logging

Avoid flooding the log in case we screw up badly.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Chia-I Wu <olvaffe@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20200205102552.21409-1-kraxel@redhat.com

drivers/gpu/drm/virtio/virtgpu_vq.c

@@ -212,7 +212,7 @@ void virtio_gpu_dequeue_ctrl_func(struct work_struct *work)
 			if (resp->type >= cpu_to_le32(VIRTIO_GPU_RESP_ERR_UNSPEC)) {
 				struct virtio_gpu_ctrl_hdr *cmd;
 				cmd = (struct virtio_gpu_ctrl_hdr *)entry->buf;
-				DRM_ERROR("response 0x%x (command 0x%x)\n",
+				DRM_ERROR_RATELIMITED("response 0x%x (command 0x%x)\n",
 						      le32_to_cpu(resp->type),
 						      le32_to_cpu(cmd->type));
 			} else