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Commit c2dc6cc9 authored by Chris Wilson's avatar Chris Wilson
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drm/i915: Add a test that we terminate the trimmed sgtable as expected 



In commit 0c40ce13 ("drm/i915: Trim the object sg table"), we expect
to copy exactly orig_st->nents across and allocate the table thusly.
The copy loop should therefore end with the new_sg being NULL.

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161219124346.550-2-chris@chris-wilson.co.uk


Reviewed-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: default avatarTvrtko Ursulin <tvrtko.ursulin@intel.com>
parent d766ef53

drivers/gpu/drm/i915/i915_gem.c

+1 −0
Original line number Diff line number Diff line
@@ -2333,6 +2333,7 @@ static void i915_sg_trim(struct sg_table *orig_st) 
		/* called before being DMA mapped, no need to copy sg->dma_* */

		new_sg = sg_next(new_sg);

	}

	GEM_BUG_ON(new_sg); /* Should walk exactly nents and hit the end */



	sg_free_table(orig_st);