Commit f5ddf697 authored Feb 18, 2013 by Imre Deak Committed by Daniel Vetter Mar 19, 2013

drm: handle compact dma scatter lists in drm_clflush_sg()

So far the assumption was that each scatter list entry contains a single
page. This might not hold in the future, when we'll introduce compact
scatter lists, so prepare for this here.

Reference: http://www.spinics.net/lists/dri-devel/msg33917.html


Signed-off-by: Imre Deak <imre.deak@intel.com>
Acked-by: Dave Airlie <airlied@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

parent 0d4a42f6

drivers/gpu/drm/drm_cache.c

+3 −4

Original line number	Diff line number	Diff line
		@@ -105,12 +105,11 @@ drm_clflush_sg(struct sg_table *st)
		{
		#if defined(CONFIG_X86)
		if (cpu_has_clflush) {
		struct scatterlist *sg;
		int i;
		struct sg_page_iter sg_iter;

		mb();
		for_each_sg(st->sgl, sg, st->nents, i)
		drm_clflush_page(sg_page(sg));
		for_each_sg_page(st->sgl, &sg_iter, st->nents, 0)
		drm_clflush_page(sg_iter.page);
		mb();

		return;