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drm/virtio: fix a wait_event condition

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outcnt may be greater than 1 since commit e1218b8c0cc1 ("drm/virtio:
Use vmalloc for command buffer allocations.").

Fixes: e1218b8c0cc1 ("drm/virtio: Use vmalloc for command buffer allocations.")
Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
Cc: David Riley <davidriley@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20200205181955.202485-2-olvaffe@gmail.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Chia-I Wu 2020-02-05 10:19:45 -08:00 committed by Gerd Hoffmann
parent e46e31cf53
commit 58547d7d5c
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/virtio/virtgpu_vq.c
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@ -391,7 +391,8 @@ again:
*/
if (vq->num_free < 2 + outcnt) {
spin_unlock(&vgdev->ctrlq.qlock);
wait_event(vgdev->ctrlq.ack_queue, vq->num_free >= 3);
wait_event(vgdev->ctrlq.ack_queue,
vq->num_free >= 2 + outcnt);
goto again;
}