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| author | Alex Deucher <alexander.deucher@amd.com> | 2012-02-13 16:36:34 -0500 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2012-02-14 13:36:23 +0000 |
| commit | b7f5b7dec3d539a84734f2bcb7e53fbb1532a40b (patch) | |
| tree | c901dee3518d50d4f543e5ad9df565a904e5c06c /drivers/gpu/drm/radeon/r100.c | |
| parent | 6f9f8a61089bb177e53e14ee62f4a65134f3692f (diff) | |
| download | lwn-b7f5b7dec3d539a84734f2bcb7e53fbb1532a40b.tar.gz lwn-b7f5b7dec3d539a84734f2bcb7e53fbb1532a40b.zip | |
drm/radeon/kms: fix MSI re-arm on rv370+
MSI_REARM_EN register is a write only trigger register.
There is no need RMW when re-arming.
May fix:
https://bugs.freedesktop.org/show_bug.cgi?id=41668
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
CC: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/r100.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/r100.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c index bfd36ab643a6..18cd84fae99c 100644 --- a/drivers/gpu/drm/radeon/r100.c +++ b/drivers/gpu/drm/radeon/r100.c @@ -789,9 +789,7 @@ int r100_irq_process(struct radeon_device *rdev) WREG32(RADEON_AIC_CNTL, msi_rearm | RS400_MSI_REARM); break; default: - msi_rearm = RREG32(RADEON_MSI_REARM_EN) & ~RV370_MSI_REARM_EN; - WREG32(RADEON_MSI_REARM_EN, msi_rearm); - WREG32(RADEON_MSI_REARM_EN, msi_rearm | RV370_MSI_REARM_EN); + WREG32(RADEON_MSI_REARM_EN, RV370_MSI_REARM_EN); break; } } |