Commit 90a838a8 authored Apr 21, 2014 by Laura Abbott Committed by Gerrit - the friendly Code Review server Apr 22, 2014

cma: Return 0 on error path



If a free CMA region cannot be found because every one is busy,
an error needs to be propegated up by returning a zero pfn.
Ensure the pfn is actually zero when returning an error.

Change-Id: I0d5a66a25c4483bf0f219cec1d7009239518f27a
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>

parent 11e8434e

drivers/base/dma-contiguous.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -609,6 +609,7 @@ unsigned long dma_alloc_from_contiguous(struct device *dev, int count,
		pageno = bitmap_find_next_zero_area(cma->bitmap, cma->count,
		start, count, mask);
		if (pageno >= cma->count) {
		pfn = 0;
		mutex_unlock(&cma->lock);
		break;
		}