diff options
| author | Joonyoung Shim <jy0922.shim@samsung.com> | 2015-09-16 14:16:45 +0900 |
|---|---|---|
| committer | Inki Dae <inki.dae@samsung.com> | 2015-09-30 16:39:40 +0900 |
| commit | 5e0fb1f9eb754eed8432392bfdc100ef295676cd (patch) | |
| tree | 3b5a0176c134d73a99bbd77be666f0de52b1785a /drivers | |
| parent | fd03420b5624617a708fb9b13634b41b37c22cfa (diff) | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_gem.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c index f12fbc36b120..a4fb78e43034 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_gem.c +++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c @@ -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++; } |