diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2015-03-02 20:36:26 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-26 15:00:56 +0100 |
| commit | a02db0f24cda0f97d9c101df3eafa7ccfc88452e (patch) | |
| tree | 65aba4d3df9fde787e512da69610a8e7408a256b | |
| parent | c1f447877ae10c0185be9823db482b324b061a9e (diff) | |
drm/radeon: do a posting read in r100_set_irq
commit f957063fee6392bb9365370db6db74dc0b2dce0a 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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 46470dd7c710..f9f0e3680d76 100644 --- a/drivers/gpu/drm/radeon/r100.c +++ b/drivers/gpu/drm/radeon/r100.c @@ -743,6 +743,10 @@ 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; } |