Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 01001863 authored by Chris Wilson's avatar Chris Wilson
Browse files

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: default avatarChris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170423170619.7156-2-chris@chris-wilson.co.uk


Reviewed-by: default avatarMika Kuoppala <mika.kuoppala@intel.com>
parent e6ba9992

drivers/gpu/drm/i915/intel_ringbuffer.c

+1 −0
Original line number Diff line number Diff line
@@ -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);