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Commit 461b6f0d authored by Marek Szyprowski's avatar Marek Szyprowski
Browse files

Merge branch 'next-cleanup' into for-v3.7

parents abebfb18 75c59716

arch/arm/mm/dma-mapping.c

+6 −5
Original line number Diff line number Diff line
@@ -1059,11 +1059,12 @@ static struct page **__iommu_alloc_buffer(struct device *dev, size_t size, gfp_t 
		if (!pages[i])

			goto error;



		if (order)

		if (order) {

			split_page(pages[i], order);

			j = 1 << order;

			while (--j)

				pages[i + j] = pages[i] + j;

		}



		__dma_clear_buffer(pages[i], PAGE_SIZE << order);

		i += 1 << order;
@@ -1814,7 +1815,7 @@ int arm_iommu_attach_device(struct device *dev, 
	dev->archdata.mapping = mapping;

	set_dma_ops(dev, &iommu_ops);



	pr_info("Attached IOMMU controller to %s device.\n", dev_name(dev));

	pr_debug("Attached IOMMU controller to %s device.\n", dev_name(dev));

	return 0;

}

drivers/base/dma-contiguous.c

+7 −11
Original line number Diff line number Diff line
@@ -315,6 +315,7 @@ struct page *dma_alloc_from_contiguous(struct device *dev, int count, 
{

	unsigned long mask, pfn, pageno, start = 0;

	struct cma *cma = dev_get_cma_area(dev);

	struct page *page = NULL;

	int ret;



	if (!cma || !cma->count)
@@ -336,18 +337,17 @@ struct page *dma_alloc_from_contiguous(struct device *dev, int count, 
	for (;;) {

		pageno = bitmap_find_next_zero_area(cma->bitmap, cma->count,

						    start, count, mask);

		if (pageno >= cma->count) {

			ret = -ENOMEM;

			goto error;

		}

		if (pageno >= cma->count)

			break;



		pfn = cma->base_pfn + pageno;

		ret = alloc_contig_range(pfn, pfn + count, MIGRATE_CMA);

		if (ret == 0) {

			bitmap_set(cma->bitmap, pageno, count);

			page = pfn_to_page(pfn);

			break;

		} else if (ret != -EBUSY) {

			goto error;

			break;

		}

		pr_debug("%s(): memory range at %p is busy, retrying\n",

			 __func__, pfn_to_page(pfn));
@@ -356,12 +356,8 @@ struct page *dma_alloc_from_contiguous(struct device *dev, int count, 
	}



	mutex_unlock(&cma_mutex);



	pr_debug("%s(): returned %p\n", __func__, pfn_to_page(pfn));

	return pfn_to_page(pfn);

error:

	mutex_unlock(&cma_mutex);

	return NULL;

	pr_debug("%s(): returned %p\n", __func__, page);

	return page;

}



/**