[PATCH 3.13.y-ckt 027/156] drm/radeon: do a posting read in r600_set_irq
Kamal Mostafa
kamal at canonical.com
Tue Apr 7 22:49:24 UTC 2015
3.13.11-ckt19 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Alex Deucher <alexander.deucher at amd.com>
commit 9d1393f23d5656cdd5f368efd60694d4aeed81d3 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 at amd.com>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
drivers/gpu/drm/radeon/r600.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index b9038b6..2f1c120 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -3559,6 +3559,9 @@ int r600_irq_set(struct radeon_device *rdev)
WREG32(RV770_CG_THERMAL_INT, thermal_int);
}
+ /* posting read */
+ RREG32(R_000E50_SRBM_STATUS);
+
return 0;
}
--
1.9.1
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