From b3bb82885feb74feadc101a700e64ed7ede84b04 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Sat, 25 Feb 2017 18:11:19 +0000 Subject: [PATCH] drm/i915: Assert all sg are initialised in fake_dma_object for selftests Double check that we allocated the right amount of scatterlist elements for our obj->size. Signed-off-by: Chris Wilson Cc: Matthew Auld Reviewed-by: Matthew Auld Link: http://patchwork.freedesktop.org/patch/msgid/20170225181122.4788-1-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/selftests/i915_gem_gtt.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c index 6bac267914df..0f3fa34377c6 100644 --- a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c @@ -62,12 +62,14 @@ fake_get_pages(struct drm_i915_gem_object *obj) for (sg = pages->sgl; sg; sg = sg_next(sg)) { unsigned long len = min_t(typeof(rem), rem, BIT(31)); + GEM_BUG_ON(!len); sg_set_page(sg, pfn_to_page(PFN_BIAS), len, 0); sg_dma_address(sg) = page_to_phys(sg_page(sg)); sg_dma_len(sg) = len; rem -= len; } + GEM_BUG_ON(rem); obj->mm.madv = I915_MADV_DONTNEED; return pages; -- GitLab