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Subject[PATCH 3.16.y-ckt 078/165] drm/radeon: do a posting read in si_set_irq
Date
3.16.7-ckt9 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alex Deucher <alexander.deucher@amd.com>

commit 0586915ec10d0ae60de5cd3381ad25a704760402 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: Luis Henriques <luis.henriques@canonical.com>
---
drivers/gpu/drm/radeon/si.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/radeon/si.c b/drivers/gpu/drm/radeon/si.c
index 23d0bbb64db5..74f41809bb42 100644
--- a/drivers/gpu/drm/radeon/si.c
+++ b/drivers/gpu/drm/radeon/si.c
@@ -5972,6 +5972,9 @@ int si_irq_set(struct radeon_device *rdev)

WREG32(CG_THERMAL_INT, thermal_int);

+ /* posting read */
+ RREG32(SRBM_STATUS);
+
return 0;
}


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