device_unregister() already drops its reference to the struct device, so explicitly calling put_device() before device_unregister() can cause the device to have been freed before it can be unregistered.
Signed-off-by: Thierry Reding treding@nvidia.com --- drivers/gpu/drm/drm_sysfs.c | 2 -- 1 file changed, 2 deletions(-)
diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c index dae42c7..db1c8f9 100644 --- a/drivers/gpu/drm/drm_sysfs.c +++ b/drivers/gpu/drm/drm_sysfs.c @@ -439,7 +439,6 @@ err_out_files: device_remove_file(connector->kdev, &connector_attrs_opt1[i]); for (i = 0; i < attr_cnt; i++) device_remove_file(connector->kdev, &connector_attrs[i]); - put_device(connector->kdev); device_unregister(connector->kdev);
out: @@ -472,7 +471,6 @@ void drm_sysfs_connector_remove(struct drm_connector *connector) for (i = 0; i < ARRAY_SIZE(connector_attrs); i++) device_remove_file(connector->kdev, &connector_attrs[i]); sysfs_remove_bin_file(&connector->kdev->kobj, &edid_attr); - put_device(connector->kdev); device_unregister(connector->kdev); connector->kdev = NULL; }