drm/radeon: do a posting read in rs600_set_irq
authorAlex Deucher <alexander.deucher@amd.com>
Tue, 3 Mar 2015 01:39:56 +0000 (20:39 -0500)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 26 Mar 2015 14:00:57 +0000 (15:00 +0100)
commit75ee55cb5901b7dd04f65ce17b5fb5da10d0e9fc
treedb7cbf32c4a979083e5dcb1468b4f085cf1e9f67
parent693fcdbda7ecc657abb6e83d306c7c43c4b766bc
drm/radeon: do a posting read in rs600_set_irq

commit 54acf107e4e66d1f4a697e08a7f60dba9fcf07c3 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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/gpu/drm/radeon/rs600.c