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drm/virtio: add virtio_gpu_cmd_unref_resource error handling 

Usually we wait for the host to complete the unref request, then cleanup
the guest-side state of the object in the completion callback.  When
submitting the unref command failed the completion callback will not be
called though, so cleanup right away.

Fixes a WARN on stale mm entries on driver shutdown.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20200908070723.6394-4-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2020-09-08 09:07:23 +02:00
parent b7170f9457
commit 9fe6bda982
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/virtio/virtgpu_vq.c
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@ -536,6 +536,7 @@ void virtio_gpu_cmd_unref_resource(struct virtio_gpu_device *vgdev,
{
struct virtio_gpu_resource_unref *cmd_p;
struct virtio_gpu_vbuffer *vbuf;
int ret;
cmd_p = virtio_gpu_alloc_cmd_cb(vgdev, &vbuf, sizeof(*cmd_p),
virtio_gpu_cmd_unref_cb);
@ -545,7 +546,9 @@ void virtio_gpu_cmd_unref_resource(struct virtio_gpu_device *vgdev,
cmd_p->resource_id = cpu_to_le32(bo->hw_res_handle);
vbuf->resp_cb_data = bo;
virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
ret = virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
if (ret < 0)
virtio_gpu_cleanup_object(bo);
}
void virtio_gpu_cmd_set_scanout(struct virtio_gpu_device *vgdev,