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Subject[PATCH 3.12 028/155] drm/radeon: do a posting read in r600_set_irq
Date
From: Alex Deucher <alexander.deucher@amd.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

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@amd.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
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 88eb936fbc2f..2c0a0d7c2492 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -3509,6 +3509,9 @@ int r600_irq_set(struct radeon_device *rdev)
WREG32(RV770_CG_THERMAL_INT, thermal_int);
}

+ /* posting read */
+ RREG32(R_000E50_SRBM_STATUS);
+
return 0;
}

--
2.3.4


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