diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2015-03-02 20:36:26 -0500 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2015-03-28 09:23:13 -0400 |
| commit | 226c62843fd105aab30f901182eca7ec39dcb683 (patch) | |
| tree | 6adcb3995650353ade43dc5d24665e5e3de6debe /drivers | |
| parent | 26f16cbdfdcf23b50be938f97ab581196e7bc73d (diff) | |
drm/radeon: do a posting read in r100_set_irq
[ Upstream commit f957063fee6392bb9365370db6db74dc0b2dce0a ]
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')
| -rw-r--r-- | drivers/gpu/drm/radeon/r100.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c index cdf6e2149539..a959cc1e7c8e 100644 --- a/drivers/gpu/drm/radeon/r100.c +++ b/drivers/gpu/drm/radeon/r100.c @@ -728,6 +728,10 @@ int r100_irq_set(struct radeon_device *rdev) tmp |= RADEON_FP2_DETECT_MASK; } WREG32(RADEON_GEN_INT_CNTL, tmp); + + /* read back to post the write */ + RREG32(RADEON_GEN_INT_CNTL); + return 0; } |