From 9a524a391964556eabe3efde6c5e4f9d6607a2e6 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Mon, 2 Mar 2015 20:43:53 -0500 Subject: drm/radeon: do a posting read in si_set_irq commit 0586915ec10d0ae60de5cd3381ad25a704760402 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: Greg Kroah-Hartman --- drivers/gpu/drm/radeon/si.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers') diff --git a/drivers/gpu/drm/radeon/si.c b/drivers/gpu/drm/radeon/si.c index 5d89b874a1a2..3045e28f4c8f 100644 --- a/drivers/gpu/drm/radeon/si.c +++ b/drivers/gpu/drm/radeon/si.c @@ -6198,6 +6198,9 @@ int si_irq_set(struct radeon_device *rdev) WREG32(CG_THERMAL_INT, thermal_int); + /* posting read */ + RREG32(SRBM_STATUS); + return 0; } -- cgit v1.2.3