drm: fix error routines in drm_open_helper

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()
should be called when error happens after their pair functions are
called. If an error occurs after executing dev->driver->open()
which allocates driver specific per-file private data, then the
private data should be released.

Signed-off-by: YoungJun Cho <[email protected]>
Signed-off-by: Seung-Woo Kim <[email protected]>
Signed-off-by: Kyungmin Park <[email protected]>
Reviewed-by: Chris Wilson <chris-wilson.co.uk>
Signed-off-by: Dave Airlie <[email protected]>

0 files changed, 0 insertions, 0 deletions