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drm/radeon/r5xx-r7xx: wait for the MC to settle after MC blackout
authorAlex Deucher <alexander.deucher@amd.com>
Thu, 31 Jan 2013 14:01:59 +0000 (09:01 -0500)
committerAlex Deucher <alexander.deucher@amd.com>
Thu, 31 Jan 2013 21:13:42 +0000 (16:13 -0500)
Some chips seem to need a little delay after blacking out
the MC before the requests actually stop. Stop DMAR errors
reported by Shuah Khan.

Reported-by: Shuah Khan <shuahkhan@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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