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Date: Sat, 21 May 2016 18:53:32 +0530 From: Muhammad Falak R Wani <falakreyaz@...il.com> To: Sumit Semwal <sumit.semwal@...aro.org> Cc: linux-media@...r.kernel.org (open list:DMA BUFFER SHARING FRAMEWORK), dri-devel@...ts.freedesktop.org (open list:DMA BUFFER SHARING FRAMEWORK), linaro-mm-sig@...ts.linaro.org (moderated list:DMA BUFFER SHARING FRAMEWORK), linux-kernel@...r.kernel.org (open list) Subject: [PATCH] dma-buf: use vma_pages(). Replace explicit computation of vma page count by a call to vma_pages() Signed-off-by: Muhammad Falak R Wani <falakreyaz@...il.com> --- drivers/dma-buf/dma-buf.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c index 4a2c07e..b0317ec 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -90,7 +90,7 @@ static int dma_buf_mmap_internal(struct file *file, struct vm_area_struct *vma) dmabuf = file->private_data; /* check for overflowing the buffer's size */ - if (vma->vm_pgoff + ((vma->vm_end - vma->vm_start) >> PAGE_SHIFT) > + if (vma->vm_pgoff + vma_pages(vma) > dmabuf->size >> PAGE_SHIFT) return -EINVAL; @@ -723,11 +723,11 @@ int dma_buf_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma, return -EINVAL; /* check for offset overflow */ - if (pgoff + ((vma->vm_end - vma->vm_start) >> PAGE_SHIFT) < pgoff) + if (pgoff + vma_pages(vma) < pgoff) return -EOVERFLOW; /* check for overflowing the buffer's size */ - if (pgoff + ((vma->vm_end - vma->vm_start) >> PAGE_SHIFT) > + if (pgoff + vma_pages(vma) > dmabuf->size >> PAGE_SHIFT) return -EINVAL; -- 1.9.1
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