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| author | Alex Deucher <alexander.deucher@amd.com> | 2015-03-02 20:36:26 -0500 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2015-05-09 23:16:22 +0100 |
| commit | cc0c7ba9a7861350f727650f89b359bb995adfc7 (patch) | |
| tree | 3ef726645eb34ee0773fe5c8ed7160f0f6bdcd41 /drivers/gpu/drm | |
| parent | 5ab80986f16ad450b5cddd3f76806cc323f89d1b (diff) | |
| download | kernel_samsung_smdk4412-cc0c7ba9a7861350f727650f89b359bb995adfc7.zip kernel_samsung_smdk4412-cc0c7ba9a7861350f727650f89b359bb995adfc7.tar.gz kernel_samsung_smdk4412-cc0c7ba9a7861350f727650f89b359bb995adfc7.tar.bz2 | |
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: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'drivers/gpu/drm')
| -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 76c1290..dfd1267 100644 --- a/drivers/gpu/drm/radeon/r100.c +++ b/drivers/gpu/drm/radeon/r100.c @@ -688,6 +688,10 @@ 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; } |