From 0586915ec10d0ae60de5cd3381ad25a704760402 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Mon, 2 Mar 2015 20:43:53 -0500 Subject: [PATCH] drm/radeon: do a posting read in si_set_irq 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 --- drivers/gpu/drm/radeon/si.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/radeon/si.c b/drivers/gpu/drm/radeon/si.c index bcf516a8a2f1..e088e5558da0 100644 --- a/drivers/gpu/drm/radeon/si.c +++ b/drivers/gpu/drm/radeon/si.c @@ -6203,6 +6203,9 @@ int si_irq_set(struct radeon_device *rdev) WREG32(CG_THERMAL_INT, thermal_int); + /* posting read */ + RREG32(SRBM_STATUS); + return 0; } -- 2.20.1