From: Alex Deucher <alexander.deucher@amd.com>
Date: Tue, 3 Mar 2015 01:42:53 +0000 (-0500)
Subject: drm/radeon: do a posting read in evergreen_set_irq
X-Git-Tag: v3.2.69~140
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4cd3e1ef38f02f5c29416fee26f0917f477d8aa7;p=pandora-kernel.git

drm/radeon: do a posting read in evergreen_set_irq

commit c320bb5f6dc0cb88a811cbaf839303e0a3916a92 upstream.

To make sure the writes go through the pci bridge.

bug:
https://bugzilla.kernel.org/show_bug.cgi?id=90741

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
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