diff mbox

drm/virtio: Don't return invalid caps on timeout

Message ID 20171127142126.25765-1-tomeu.vizoso@collabora.com (mailing list archive)
State New, archived
Headers show

Commit Message

Tomeu Vizoso Nov. 27, 2017, 2:21 p.m. UTC 
If the wait timeouts, the caps are probably invalid and we shouldn't be
passing them to userspace.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
---
 drivers/gpu/drm/virtio/virtgpu_ioctl.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
index b94bd5440e57..902120ad4a6d 100644
--- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c
+++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
@@ -517,6 +517,8 @@  static int virtio_gpu_get_caps_ioctl(struct drm_device *dev,
 
 	ret = wait_event_timeout(vgdev->resp_wq,
 				 atomic_read(&cache_ent->is_valid), 5 * HZ);
+	if (!ret)
+		return -EBUSY;
 
 	ptr = cache_ent->caps_cache;