| From | Luis Henriques <> | | Subject | [PATCH 3.16.y-ckt 075/165] drm/radeon: do a posting read in rs600_set_irq | | Date | Wed, 25 Mar 2015 14:00:48 +0000 |
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3.16.7-ckt9 -stable review patch. If anyone has any objections, please let me know.
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From: Alex Deucher <alexander.deucher@amd.com>
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: Luis Henriques <luis.henriques@canonical.com> --- drivers/gpu/drm/radeon/rs600.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/radeon/rs600.c b/drivers/gpu/drm/radeon/rs600.c index d6e64b93d8b1..1016f53f755c 100644 --- a/drivers/gpu/drm/radeon/rs600.c +++ b/drivers/gpu/drm/radeon/rs600.c @@ -684,6 +684,10 @@ int rs600_irq_set(struct radeon_device *rdev) WREG32(R_007D18_DC_HOT_PLUG_DETECT2_INT_CONTROL, hpd2); if (ASIC_IS_DCE2(rdev)) WREG32(R_007408_HDMI0_AUDIO_PACKET_CONTROL, hdmi0); + + /* posting read */ + RREG32(R_000040_GEN_INT_CNTL); + return 0; }
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