From: Alex Deucher Date: Tue, 3 Mar 2015 01:42:53 +0000 (-0500) Subject: drm/radeon: do a posting read in evergreen_set_irq X-Git-Tag: v3.18.11~74 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=26f16cbdfdcf23b50be938f97ab581196e7bc73d;p=thirdparty%2Fkernel%2Fstable.git 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 Cc: stable@vger.kernel.org Signed-off-by: Sasha Levin --- diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c index 85995b4e33387..c674f63d7f14e 100644 --- a/drivers/gpu/drm/radeon/evergreen.c +++ b/drivers/gpu/drm/radeon/evergreen.c @@ -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; }