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authorInki Dae <inki.dae@samsung.com>2012-04-23 19:41:14 +0900
committerInki Dae <inki.dae@samsung.com>2012-04-23 20:31:45 +0900
commitf6ead8dea518d0d02c576432eba4fa145e64b02a (patch)
treee4e82e1408e4133ef06b40d47d9be9eae4d1d2a3 /drivers/gpu/drm
parent887ea3db26ec8a43b650ada273e1159492939c10 (diff)
drm/exynos: fixed exynos_drm_gem_map_pages bug.
this patch fixes the problem that the physical memory region to be mapped to user space could be exceeded. if page fault address was placed at between buffer start and end then memory region to be mapped would be exceeded. Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Diffstat (limited to 'drivers/gpu/drm')
-rw-r--r--drivers/gpu/drm/exynos/exynos_drm_gem.c16
1 files changed, 3 insertions, 13 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c
index b1850c30e04..f09d292a2e3 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c
@@ -149,22 +149,12 @@ static int exynos_drm_gem_map_pages(struct drm_gem_object *obj,
unsigned long pfn;
if (exynos_gem_obj->flags & EXYNOS_BO_NONCONTIG) {
- unsigned long usize = buf->size;
-
if (!buf->pages)
return -EINTR;
- while (usize > 0) {
- pfn = page_to_pfn(buf->pages[page_offset++]);
- vm_insert_mixed(vma, f_vaddr, pfn);
- f_vaddr += PAGE_SIZE;
- usize -= PAGE_SIZE;
- }
-
- return 0;
- }
-
- pfn = (buf->dma_addr >> PAGE_SHIFT) + page_offset;
+ pfn = page_to_pfn(buf->pages[page_offset++]);
+ } else
+ pfn = (buf->dma_addr >> PAGE_SHIFT) + page_offset;
return vm_insert_mixed(vma, f_vaddr, pfn);
}