[PATCH v3 3/3] drm: fix error routines in drm_open_helper

From: YoungJun Cho There are missing parts to handle error in drm_open_helper(). The priv->minor, assigned by idr_find() which can return NULL, should be checked whether it is NULL or not before referencing it. put_pid(), drm_gem_release(), and

[PATCH v3 3/3] drm: fix error routines in drm_open_helper

From: YoungJun Cho yj44@samsung.com There are missing parts to handle error in drm_open_helper(). The priv-minor, assigned by idr_find() which can return NULL, should be checked whether it is NULL or not before referencing it. put_pid(), drm_gem_release(), and drm_prime_destory_file_private()