[Intel-gfx] [PATCH 1/2] drm/i915: Disable MI_SET_CONTEXT psmi w/a for bdw

[Chris Wilson]

The current w/a for the gen7 psmi related hangs doesn't apply to bdw, so
disable it if using bdw ringbuffer submission.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_gem_context.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index e8dc3e74c093..68dc81aee2f1 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -660,7 +660,7 @@ mi_set_context(struct drm_i915_gem_request *req, u32 flags)
 	enum intel_engine_id id;
 	const int num_rings =
 		/* Use an extended w/a on ivb+ if signalling from other rings */
-		i915.semaphores ?
+		(i915.semaphores && INTEL_GEN(dev_priv) == 7) ?
 		INTEL_INFO(dev_priv)->num_rings - 1 :
 		0;
 	int len;
-- 
2.11.0