[PATCH 3.14 23/79] drm/radeon: do a posting read in si_set_irq
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2015-03-24 17:52:49
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3.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alex Deucher <alexander.deucher@amd.com> 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 <alexander.deucher@amd.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/gpu/drm/radeon/si.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/gpu/drm/radeon/si.c
+++ b/drivers/gpu/drm/radeon/si.c@@ -5958,6 +5958,9 @@ int si_irq_set(struct radeon_device *rde WREG32(CG_THERMAL_INT, thermal_int); + /* posting read */ + RREG32(SRBM_STATUS); + return 0; }