diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2015-03-02 20:36:26 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2015-03-03 17:28:26 -0500 |
| commit | f957063fee6392bb9365370db6db74dc0b2dce0a (patch) | |
| tree | 86363b94a4511e5df04dd06266a1b629d71a518f /drivers | |
| parent | 2afa3265b21ada7583bf4a69defe4539ad4df7cf (diff) | |
drm/radeon: do a posting read in r100_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')
| -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 279801ca5110..04f2514f7564 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; } |