diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-06-01 22:32:25 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-06-01 22:32:25 +0300 |
| commit | ebb8cb2bae0344ef45cc173cdf5402ec91198abd (patch) | |
| tree | 7c21eb9c7a7bf9714035bd243e776e01747206ae /drivers/dma-buf/dma-buf.c | |
| parent | 6b15d6650c5301ce023d8df0cc3a60b1a76d377e (diff) | |
| parent | b02da6f8236148009c22167cd7013d5ce04a2d37 (diff) | |
| download | linux-ebb8cb2bae0344ef45cc173cdf5402ec91198abd.tar.xz | |
Merge tag 'dma-buf-for-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/sumits/dma-buf
Pull dma-buf updates from Sumit Semwal:
- use of vma_pages instead of explicit computation
- DocBook and headerdoc updates for dma-buf
* tag 'dma-buf-for-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/sumits/dma-buf:
dma-buf: use vma_pages()
fence: add missing descriptions for fence
doc: update/fixup dma-buf related DocBook
reservation: add headerdoc comments
dma-buf: headerdoc fixes
Diffstat (limited to 'drivers/dma-buf/dma-buf.c')
| -rw-r--r-- | drivers/dma-buf/dma-buf.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c index 4a2c07ee6677..6355ab38d630 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -33,6 +33,7 @@ #include <linux/seq_file.h> #include <linux/poll.h> #include <linux/reservation.h> +#include <linux/mm.h> #include <uapi/linux/dma-buf.h> @@ -90,7 +91,7 @@ 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 +724,11 @@ 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; |