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Subject[PATCH 3.10 20/55] drm/radeon: do a posting read in si_set_irq
Date
3.10-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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/gpu/drm/radeon/si.c | 3 +++
1 file changed, 3 insertions(+)

--- a/drivers/gpu/drm/radeon/si.c
+++ b/drivers/gpu/drm/radeon/si.c
@@ -5778,5 +5778,8 @@ int si_set_uvd_clocks(struct radeon_devi

mdelay(100);

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



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