diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2015-03-02 20:45:24 -0500 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2015-03-28 09:23:28 -0400 |
| commit | 09e605b31431b59a09c4e8ca3150590b929b2ed5 (patch) | |
| tree | 5033a5c637c3fab41a91ebfafb98f084f41aebd8 /drivers/gpu/drm | |
| parent | a5f1220ce4120b18c72183908c30d3588442002a (diff) | |
drm/radeon: do a posting read in cik_set_irq
[ Upstream commit cffefd9bb31cd35ab745d3b49005d10616d25bdc ]
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
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/radeon/cik.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c index 5f395be9b3e3..0c6fbc0198a5 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; } |