Commit fcdd19b8 authored by Gerd Hoffmann's avatar 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: default avatarGerd Hoffmann <kraxel@redhat.com>
Reviewed-by: default avatarChia-I Wu <olvaffe@gmail.com>
Reviewed-by: default avatarGurchetan Singh <gurchetansingh@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20200214125535.26349-3-kraxel@redhat.com
parent cca41da1
...@@ -346,6 +346,7 @@ static void virtio_gpu_queue_ctrl_sgs(struct virtio_gpu_device *vgdev, ...@@ -346,6 +346,7 @@ static void virtio_gpu_queue_ctrl_sgs(struct virtio_gpu_device *vgdev,
if (vq->num_free < elemcnt) { if (vq->num_free < elemcnt) {
spin_unlock(&vgdev->ctrlq.qlock); spin_unlock(&vgdev->ctrlq.qlock);
virtio_gpu_notify(vgdev);
wait_event(vgdev->ctrlq.ack_queue, vq->num_free >= elemcnt); wait_event(vgdev->ctrlq.ack_queue, vq->num_free >= elemcnt);
goto again; goto again;
} }
......
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