linux-kernel - [PATCH 3/8] drm: Do not include page offset in argument to virt_to

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Date:	Sun, 27 Oct 2013 21:52:17 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	David Airlie <airlied@...ux.ie>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	dri-devel@...ts.freedesktop.org
Subject: [PATCH 3/8] drm: Do not include page offset in argument to
 virt_to_page()

By definition, the page offset will not affect the result.

Compile-tested only.

Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/gpu/drm/drm_vm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_vm.c b/drivers/gpu/drm/drm_vm.c
index b5c5af7..8ef6503 100644
--- a/drivers/gpu/drm/drm_vm.c
+++ b/drivers/gpu/drm/drm_vm.c
@@ -301,7 +301,7 @@ static int drm_do_vm_dma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 
 	offset = (unsigned long)vmf->virtual_address - vma->vm_start;	/* vm_[pg]off[set] should be 0 */
 	page_nr = offset >> PAGE_SHIFT; /* page_nr could just be vmf->pgoff */
-	page = virt_to_page((dma->pagelist[page_nr] + (offset & (~PAGE_MASK))));
+	page = virt_to_page(dma->pagelist[page_nr]);
 
 	get_page(page);
 	vmf->page = page;


-- 
Ben Hutchings
If at first you don't succeed, you're doing about average.

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