| From | Ben Hutchings <> | Date | Tue, 05 May 2015 02:16:39 +0100 | Subject | [PATCH 3.2 079/221] drm/radeon: do a posting read in rs600_set_irq |
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3.2.69-rc1 review patch. If anyone has any objections, please let me know.
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From: Alex Deucher <alexander.deucher@amd.com>
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> --- drivers/gpu/drm/radeon/rs600.c | 4 ++++ 1 file changed, 4 insertions(+)
--- 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 * 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; }
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