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)
committerBen Hutchings <ben@decadent.org.uk>
Sat, 9 May 2015 22:16:22 +0000 (23:16 +0100)
commit8a4f313bcfa70da6981f2d1321e1915541def2c8
tree1be8e97b6a672c5790ec67b3313a5e6b81ed8f71
parentcc0c7ba9a7861350f727650f89b359bb995adfc7
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>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
drivers/gpu/drm/radeon/rs600.c