Commit 09e605b3 authored Mar 02, 2015 by Alex Deucher Committed by Sasha Levin Mar 28, 2015

drm/radeon: do a posting read in cik_set_irq

[ Upstream commit cffefd9bb31cd35ab745d3b49005d10616d25bdc ]

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>
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

parent a5f1220c

drivers/gpu/drm/radeon/cik.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -7555,6 +7555,9 @@ int cik_irq_set(struct radeon_device *rdev)
		WREG32(DC_HPD5_INT_CONTROL, hpd5);
		WREG32(DC_HPD6_INT_CONTROL, hpd6);

		/* posting read */
		RREG32(SRBM_STATUS);

		return 0;
		}