From aa019b791a3e138ca0eaa38e72b4ea97d482a7bc Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexdeucher@gmail.com>
Date: Wed, 30 Apr 2014 09:27:15 -0400
Subject: [PATCH] drm/radeon/dp: check for errors in dpcd reads
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Check to make sure the transaction succeeded before
using the register value.  Fixes occasional link training
problems.

Noticed-by: Sergei Antonov <saproj@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
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Reading git-format-patch failed