From 24f47acc78b0ab5e2201f859fe1f693ae90c7c83 Mon Sep 17 00:00:00 2001
From: =?utf8?q?J=C3=A9r=C3=B4me=20Glisse?= <jglisse@redhat.com>
Date: Wed, 7 May 2014 16:35:24 -0400
Subject: [PATCH] drm/radeon: avoid segfault on device open when accel is not
 working.
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When accel is not working on device with virtual address space radeon
segfault because the ib buffer is NULL and trying to map it inside the
virtual address space trigger segfault. This patch only map the ib
buffer if accel is working.

Cc: <stable@vger.kernel.org>
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
---
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