tree b8bb721fe4a516240583e740c33d751df2eb28c6
parent ca3c61f358d8e5a4b2732d6aa81ac46f677e69f0
author Bin Wang <binw@marvell.com> 1395726726 +0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1401225066 -0700

uio: fix vma io range check in mmap

the vma range size is always page size aligned in mmap, while the
real io space range may not be page aligned, thus leading to range
check failure in the uio_mmap_physical().

for example, in a case of io range size "mem->size == 1KB", and we
have (vma->vm_end - vma->vm_start) == 4KB, due to "len" is aligned
to page size in do_mmap_pgoff().

now fix this issue by align mem->size to page size in the check.

Signed-off-by: Bin Wang <binw@marvell.com>
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>