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| author | Alex Deucher <alexander.deucher@amd.com> | 2015-03-02 20:39:56 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-26 15:00:57 +0100 |
| commit | 75ee55cb5901b7dd04f65ce17b5fb5da10d0e9fc (patch) | |
| tree | db7cbf32c4a979083e5dcb1468b4f085cf1e9f67 | |
| parent | 693fcdbda7ecc657abb6e83d306c7c43c4b766bc (diff) | |
| download | lwn-75ee55cb5901b7dd04f65ce17b5fb5da10d0e9fc.tar.gz lwn-75ee55cb5901b7dd04f65ce17b5fb5da10d0e9fc.zip | |
drm/radeon: do a posting read in rs600_set_irq
commit 54acf107e4e66d1f4a697e08a7f60dba9fcf07c3 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/rs600.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/rs600.c b/drivers/gpu/drm/radeon/rs600.c index ae813fef0818..971d55f73e0c 100644 --- a/drivers/gpu/drm/radeon/rs600.c +++ b/drivers/gpu/drm/radeon/rs600.c @@ -636,6 +636,10 @@ int rs600_irq_set(struct radeon_device *rdev) WREG32(R_007D18_DC_HOT_PLUG_DETECT2_INT_CONTROL, hpd2); if (ASIC_IS_DCE2(rdev)) WREG32(R_007408_HDMI0_AUDIO_PACKET_CONTROL, hdmi0); + + /* posting read */ + RREG32(R_000040_GEN_INT_CNTL); + return 0; } |