From 9734ad13c2321e8efc1fab4665d40d88e947c560 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Sun, 15 Jan 2017 17:27:40 +0000 Subject: [PATCH] drm/i915: Assert we do not attempt to reuse an allocated node i915_gem_gtt_reserve() and i915_gem_gtt_insert() can only work on unallocated nodes. Check that the callers complies. Signed-off-by: Chris Wilson Link: http://patchwork.freedesktop.org/patch/msgid/20170115172740.28995-1-chris@chris-wilson.co.uk Reviewed-by: Joonas Lahtinen --- drivers/gpu/drm/i915/i915_gem_gtt.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index 786229137f915..64f241bffc80a 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -3627,6 +3627,7 @@ int i915_gem_gtt_reserve(struct i915_address_space *vm, GEM_BUG_ON(!IS_ALIGNED(offset, I915_GTT_MIN_ALIGNMENT)); GEM_BUG_ON(range_overflows(offset, size, vm->total)); GEM_BUG_ON(vm == &vm->i915->mm.aliasing_ppgtt->base); + GEM_BUG_ON(drm_mm_node_allocated(node)); node->size = size; node->start = offset; @@ -3720,6 +3721,7 @@ int i915_gem_gtt_insert(struct i915_address_space *vm, GEM_BUG_ON(start > 0 && !IS_ALIGNED(start, I915_GTT_PAGE_SIZE)); GEM_BUG_ON(end < U64_MAX && !IS_ALIGNED(end, I915_GTT_PAGE_SIZE)); GEM_BUG_ON(vm == &vm->i915->mm.aliasing_ppgtt->base); + GEM_BUG_ON(drm_mm_node_allocated(node)); if (unlikely(range_overflows(start, size, end))) return -ENOSPC; -- 2.39.5