diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2015-03-02 20:39:56 -0500 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2015-05-09 23:16:22 +0100 |
| commit | 8a4f313bcfa70da6981f2d1321e1915541def2c8 (patch) | |
| tree | 1be8e97b6a672c5790ec67b3313a5e6b81ed8f71 /drivers | |
| parent | cc0c7ba9a7861350f727650f89b359bb995adfc7 (diff) | |
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>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'drivers')
| -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 dc00155636b6..fc37558dbd2a 100644 --- a/drivers/gpu/drm/radeon/rs600.c +++ b/drivers/gpu/drm/radeon/rs600.c @@ -576,6 +576,10 @@ int rs600_irq_set(struct radeon_device *rdev) WREG32(R_006540_DxMODE_INT_MASK, mode_int); WREG32(R_007D08_DC_HOT_PLUG_DETECT1_INT_CONTROL, hpd1); WREG32(R_007D18_DC_HOT_PLUG_DETECT2_INT_CONTROL, hpd2); + + /* posting read */ + RREG32(R_000040_GEN_INT_CNTL); + return 0; } |