[PATCH v2] drm/virtio: exbuf->fence_fd unmodified on interrupted wait

[Dmitry Osipenko]

On 2/4/23 02:33, Ryan Neph wrote:
> An interrupted dma_fence_wait() becomes an -ERESTARTSYS returned
> to userspace ioctl(DRM_IOCTL_VIRTGPU_EXECBUFFER) calls, prompting to
> retry the ioctl(), but the passed exbuf->fence_fd has been reset to -1,
> making the retry attempt fail at sync_file_get_fence().
> 
> The uapi for DRM_IOCTL_VIRTGPU_EXECBUFFER is changed to retain the
> passed value for exbuf->fence_fd when returning anything besides a
> successful result from the ioctl.
> 
> Fixes: 2cd7b6f08bc4 ("drm/virtio: add in/out fence support for explicit synchronization")
> Signed-off-by: Ryan Neph <ryanneph at chromium.org>
> Reviewed-by: Rob Clark <robdclark at gmail.com>
> Reviewed-by: Dmitry Osipenko <dmitry.osipenko at collabora.com>
> 
> ---
> 
> Changes in v2:
> - No longer modifies exbuf->fence_fd unless DRM_IOCTL_VIRTGPU_EXECBUFFER
>   succeeds.
> - Added r-b tags (Rob/Dmitry) from v1.

Thanks! Applied to misc-fixes

-- 
Best regards,
Dmitry