From 010018638659fbe8332c470e94750daf6ef4ab14 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Sun, 23 Apr 2017 18:06:17 +0100 Subject: [PATCH] drm/i915: Poison the request before emitting commands If we poison the request before we emit commands, it should be easier to spot when we execute an uninitialised request. References: https://bugs.freedesktop.org/show_bug.cgi?id=100144 Signed-off-by: Chris Wilson Link: http://patchwork.freedesktop.org/patch/msgid/20170423170619.7156-2-chris@chris-wilson.co.uk Reviewed-by: Mika Kuoppala --- drivers/gpu/drm/i915/intel_ringbuffer.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index 227dfcf1764e..6836efb7e3d2 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -1694,6 +1694,7 @@ u32 *intel_ring_begin(struct drm_i915_gem_request *req, int num_dwords) GEM_BUG_ON(ring->emit > ring->size - bytes); cs = ring->vaddr + ring->emit; + GEM_DEBUG_EXEC(memset(cs, POISON_INUSE, bytes)); ring->emit += bytes; ring->space -= bytes; GEM_BUG_ON(ring->space < 0); -- 2.20.1