Commit 5e0fb1f9 authored Sep 16, 2015 by Joonyoung Shim Committed by Inki Dae Sep 30, 2015

drm/exynos: fix layering violation of address



There is no guarantee that DMA addresses are the same as physical
addresses, but dma_to_pfn() knows how to convert a dma_addr_t to a PFN
which can then be converted to a struct page.

Suggested-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

parent fd03420b

drivers/gpu/drm/exynos/exynos_drm_gem.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -77,7 +77,8 @@ static int exynos_drm_alloc_buf(struct exynos_drm_gem_obj *obj)

		start_addr = obj->dma_addr;
		while (i < nr_pages) {
		obj->pages[i] = phys_to_page(start_addr);
		obj->pages[i] = pfn_to_page(dma_to_pfn(dev->dev,
		start_addr));
		start_addr += PAGE_SIZE;
		i++;
		}

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