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authorAlex Deucher <alexander.deucher@amd.com>2015-03-02 20:45:24 -0500
committerAlex Deucher <alexander.deucher@amd.com>2015-03-03 17:28:29 -0500
commitcffefd9bb31cd35ab745d3b49005d10616d25bdc (patch)
treed8bd408ffae38efc7dfa958ecd802f87e573cf25 /drivers/gpu/drm/radeon
parent0586915ec10d0ae60de5cd3381ad25a704760402 (diff)
downloadop-kernel-dev-cffefd9bb31cd35ab745d3b49005d10616d25bdc.zip
op-kernel-dev-cffefd9bb31cd35ab745d3b49005d10616d25bdc.tar.gz
drm/radeon: do a posting read in cik_set_irq
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> Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/gpu/drm/radeon')
-rw-r--r--drivers/gpu/drm/radeon/cik.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c
index 0c993da..3e670d3 100644
--- a/drivers/gpu/drm/radeon/cik.c
+++ b/drivers/gpu/drm/radeon/cik.c
@@ -7555,6 +7555,9 @@ int cik_irq_set(struct radeon_device *rdev)
WREG32(DC_HPD5_INT_CONTROL, hpd5);
WREG32(DC_HPD6_INT_CONTROL, hpd6);
+ /* posting read */
+ RREG32(SRBM_STATUS);
+
return 0;
}
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