From 360ce682f25589ce8e86f4829495d52559c4fa9b Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Mon, 2 Mar 2015 20:41:31 -0500 Subject: [PATCH] drm/radeon: do a posting read in r600_set_irq 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 Signed-off-by: Ben Hutchings --- 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 ab46a994c309..e5299a04da9c 100644 --- a/drivers/gpu/drm/radeon/r600.c +++ b/drivers/gpu/drm/radeon/r600.c @@ -3156,6 +3156,9 @@ int r600_irq_set(struct radeon_device *rdev) WREG32(DC_HOT_PLUG_DETECT3_INT_CONTROL, hpd3); } + /* posting read */ + RREG32(R_000E50_SRBM_STATUS); + return 0; } -- 2.39.5