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drm/i915: Assert all sg are initialised in fake_dma_object for selftests
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Double check that we allocated the right amount of scatterlist elements
for our obj->size.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.william.auld@gmail.com>
Reviewed-by: Matthew Auld <matthew.william.auld@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170225181122.4788-1-chris@chris-wilson.co.uk
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Chris Wilson committed Feb 25, 2017
1 parent 91e3215 commit b3bb828
Showing 1 changed file with 2 additions and 0 deletions.
2 changes: 2 additions & 0 deletions drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
Original file line number Diff line number Diff line change
Expand Up @@ -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;
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