drm/radeon: do a posting read in r100_set_irq
authorAlex Deucher <alexander.deucher@amd.com>
Tue, 3 Mar 2015 01:36:26 +0000 (20:36 -0500)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 26 Mar 2015 14:00:56 +0000 (15:00 +0100)
commita02db0f24cda0f97d9c101df3eafa7ccfc88452e
tree65aba4d3df9fde787e512da69610a8e7408a256b
parentc1f447877ae10c0185be9823db482b324b061a9e
drm/radeon: do a posting read in r100_set_irq

commit f957063fee6392bb9365370db6db74dc0b2dce0a 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/r100.c