From: Seung-Woo Kim <sw0312.kim@samsung.com>
Date: Tue, 2 Jul 2013 00:53:28 +0000 (+0900)
Subject: drm: fix error routines in drm_open_helper
X-Git-Tag: v3.11-rc1~65^2~13
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=df9b6a9c3333a99d4483e92ca6b225b335567313;p=pandora-kernel.git

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 <yj44.cho@samsung.com>
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Chris Wilson <chris-wilson.co.uk>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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