diff options
| author | Jean-Samuel Chenard <jsamch@gmail.com> | 2008-03-25 06:35:08 +0000 |
|---|---|---|
| committer | Chris Wright <chrisw@sous-sol.org> | 2008-04-18 18:53:19 -0700 |
| commit | 2b003ee8211d1e78f257dd91a5a24b425d330a1d (patch) | |
| tree | a026c3f13a29857dc9751d0068884bb1d9d84d8e | |
| parent | 490b69825567385d30f20a1fa1e43dc9573bb815 (diff) | |
UIO: add pgprot_noncached() to UIO mmap code
upstream commit: c9698d6b1a90929e427a165bd8283f803f57d9bd
Mapping of physical memory in UIO needs pgprot_noncached() to ensure
that IO memory is not cached. Without pgprot_noncached(), it (accidentally)
works on x86 and arm, but fails on PPC.
Signed-off-by: Jean-Samuel Chenard <jsamch@gmail.com>
Signed-off-by: Hans J Koch <hjk@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
| -rw-r--r-- | drivers/uio/uio.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c index 865f32b63b5c..b4e10225aa61 100644 --- a/drivers/uio/uio.c +++ b/drivers/uio/uio.c @@ -447,6 +447,8 @@ static int uio_mmap_physical(struct vm_area_struct *vma) vma->vm_flags |= VM_IO | VM_RESERVED; + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + return remap_pfn_range(vma, vma->vm_start, idev->info->mem[mi].addr >> PAGE_SHIFT, |