Commit 01001863 authored by Chris Wilson's avatar Chris Wilson

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=100144Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170423170619.7156-2-chris@chris-wilson.co.ukReviewed-by: default avatarMika Kuoppala <mika.kuoppala@intel.com>
parent e6ba9992
...@@ -1694,6 +1694,7 @@ u32 *intel_ring_begin(struct drm_i915_gem_request *req, int num_dwords) ...@@ -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); GEM_BUG_ON(ring->emit > ring->size - bytes);
cs = ring->vaddr + ring->emit; cs = ring->vaddr + ring->emit;
GEM_DEBUG_EXEC(memset(cs, POISON_INUSE, bytes));
ring->emit += bytes; ring->emit += bytes;
ring->space -= bytes; ring->space -= bytes;
GEM_BUG_ON(ring->space < 0); GEM_BUG_ON(ring->space < 0);
......
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