From 1cd1ea565f3ece26dff3a94bf73e4f6caae140b9 Mon Sep 17 00:00:00 2001
From: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
Date: Wed, 23 Jul 2014 16:57:12 +0200
Subject: [PATCH] drm/exynos: g2d: make ioctls more robust

Both exynos_g2d_set_cmdlist_ioctl and exynos_g2d_exec_ioctl don't check
if the G2D was succesfully probe. If that is not the case, then g2d_priv
is just NULL and extracting 'dev' from it in the next step  is going to
produce a kernel oops.

Add proper checks and return ENODEV if the G2D is not available.

Signed-off-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
Signed-off-by: INki Dae <inki.dae@samsung.com>
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