sh: split coherent pages (da9fdc8b) · Commits · 戴 / test

arch/sh/mm/consistent.c

+6 −1

Original line number	Diff line number	Diff line
		@@ -42,6 +42,8 @@ void dma_alloc_coherent(struct device dev, size_t size,
		return NULL;
		}

		split_page(pfn_to_page(virt_to_phys(ret) >> PAGE_SHIFT), order);

		*dma_handle = virt_to_phys(ret);
		return ret_nocache;
		}
		@@ -51,10 +53,13 @@ void dma_free_coherent(struct device *dev, size_t size,
		void *vaddr, dma_addr_t dma_handle)
		{
		int order = get_order(size);
		unsigned long pfn = dma_handle >> PAGE_SHIFT;
		int k;

		if (!dma_release_from_coherent(dev, order, vaddr)) {
		WARN_ON(irqs_disabled()); /* for portability */
		free_pages((unsigned long)phys_to_virt(dma_handle), order);
		for (k = 0; k < (1 << order); k++)
		__free_pages(pfn_to_page(pfn + k), 0);
		iounmap(vaddr);
		}
		}