Revert "uio: fix vma io range check in mmap"

This reverts commit ddb09754e6c7239e302c7b675df9bbd415f8de5d.

Linus objected to this originally, I can see why it might be needed, but
given that no one spoke up defending this patch, I'm going to revert it.

If you have hardware that requires this change, please speak up in the
future and defend the patch.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Bin Wang <binw@marvell.com>
Cc: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Cc: Norbert Ciosek <norbertciosek@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index e371f5af11f5b91c16d183b90649f64005ad58a7..a673e5b6a2e0b7500cdf6f101b5467f4a8e58da2 100644 (file)
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -655,7 +655,7 @@ static int uio_mmap_physical(struct vm_area_struct *vma)
 
        if (mem->addr & ~PAGE_MASK)
                return -ENODEV;
-       if (vma->vm_end - vma->vm_start > PAGE_ALIGN(mem->size))
+       if (vma->vm_end - vma->vm_start > mem->size)
                return -EINVAL;
 
        vma->vm_ops = &uio_physical_vm_ops;