Commit 26f16cbd authored Mar 02, 2015 by Alex Deucher Committed by Sasha Levin Mar 28, 2015

drm/radeon: do a posting read in evergreen_set_irq

[ Upstream commit c320bb5f6dc0cb88a811cbaf839303e0a3916a92 ]

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 7d5b23fa

drivers/gpu/drm/radeon/evergreen.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -4589,6 +4589,9 @@ int evergreen_irq_set(struct radeon_device *rdev)
		WREG32(AFMT_AUDIO_PACKET_CONTROL + EVERGREEN_CRTC4_REGISTER_OFFSET, afmt5);
		WREG32(AFMT_AUDIO_PACKET_CONTROL + EVERGREEN_CRTC5_REGISTER_OFFSET, afmt6);

		/* posting read */
		RREG32(SRBM_STATUS);

		return 0;
		}