Commit fcdd19b8 authored Feb 14, 2020 by Gerd Hoffmann

drm/virtio: notify before waiting



Before we are going to wait for virtqueue entries becoming available
call virtio_gpu_notify() to make sure the host has seen everything
we've submitted.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Chia-I Wu <olvaffe@gmail.com>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20200214125535.26349-3-kraxel@redhat.com

parent cca41da1

drivers/gpu/drm/virtio/virtgpu_vq.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -346,6 +346,7 @@ again:

		if (vq->num_free < elemcnt) {
		spin_unlock(&vgdev->ctrlq.qlock);
		virtio_gpu_notify(vgdev);
		wait_event(vgdev->ctrlq.ack_queue, vq->num_free >= elemcnt);
		goto again;
		}

Admin message