drm/virtio: Unlock reservations on virtio_gpu_object_shmem_init() error

Unlock reservations in the error code path of virtio_gpu_object_create()
to silence debug warning splat produced by ww_mutex_destroy(&obj->lock)
when GEM is released with the held lock.

Cc: stable@vger.kernel.org
Fixes: 30172efbfb84 ("drm/virtio: blob prep: refactor getting pages and attaching backing")
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20220630200726.1884320-4-dmitry.osipenko@collabora.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c b/drivers/gpu/drm/virtio/virtgpu_object.c
index 87b19b3..75a159d 100644 (file)
--- a/drivers/gpu/drm/virtio/virtgpu_object.c
+++ b/drivers/gpu/drm/virtio/virtgpu_object.c
@@ -249,6 +249,8 @@ int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
 
        ret = virtio_gpu_object_shmem_init(vgdev, bo, &ents, &nents);
        if (ret != 0) {
+               if (fence)
+                       virtio_gpu_array_unlock_resv(objs);
                virtio_gpu_array_put_free(objs);
                virtio_gpu_free_object(&shmem_obj->base);
                return ret;