diff mbox series

[v4,2/6] drm/virtio: notify before waiting

Message ID 20200214125535.26349-3-kraxel@redhat.com (mailing list archive)
State New, archived
Headers show
Series drm/virtio: rework batching | expand

Commit Message

Gerd Hoffmann Feb. 14, 2020, 12:55 p.m. UTC 
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>
---
 drivers/gpu/drm/virtio/virtgpu_vq.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_vq.c
index 6cc259cfa517..653efb26bcd9 100644
--- a/drivers/gpu/drm/virtio/virtgpu_vq.c
+++ b/drivers/gpu/drm/virtio/virtgpu_vq.c
@@ -346,6 +346,7 @@  static void virtio_gpu_queue_ctrl_sgs(struct virtio_gpu_device *vgdev,
 
 	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;
 	}