-stable review patch. If anyone has any objections, please let us know.
------------------
From: Benjamin Herrenschmidt <[email protected]>
While digging through my MAP_FIXED changes, I found that rather obvious
bug in /dev/mem mmap implementation for nommu archs. get_unmapped_area()
is expected to return an address, not a pfn.
Signed-off-by: Benjamin Herrenschmidt <[email protected]>
Acked-By: David Howells <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/char/mem.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -248,7 +248,7 @@ static unsigned long get_unmapped_area_m
{
if (!valid_mmap_phys_addr_range(pgoff, len))
return (unsigned long) -EINVAL;
- return pgoff;
+ return pgoff << PAGE_SHIFT;
}
/* can't do an in-place private mapping if there's no MMU */
--
-
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