diff options
Diffstat (limited to 'drivers/gpu/drm/drm_dp_aux_dev.c')
| -rw-r--r-- | drivers/gpu/drm/drm_dp_aux_dev.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_dp_aux_dev.c b/drivers/gpu/drm/drm_dp_aux_dev.c index e25181bf2c48..06b374cae956 100644 --- a/drivers/gpu/drm/drm_dp_aux_dev.c +++ b/drivers/gpu/drm/drm_dp_aux_dev.c @@ -278,6 +278,12 @@ void drm_dp_aux_unregister_devnode(struct drm_dp_aux *aux) if (!aux_dev) /* attach must have failed */ return; + /* + * As some AUX adapters may exist as platform devices which outlive their respective DRM + * devices, we clear drm_dev to ensure that we never accidentally reference a stale pointer + */ + aux->drm_dev = NULL; + mutex_lock(&aux_idr_mutex); idr_remove(&aux_idr, aux_dev->index); mutex_unlock(&aux_idr_mutex); |