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fix bogon in /dev/mem mmap'ing on nommu

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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 <benh@kernel.crashing.org>
Acked-By: David Howells <dhowells@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Benjamin Herrenschmidt
2007-04-16 22:53:16 -07:00
committed by Linus Torvalds
parent 112654208b
commit 8a93258ce3
1 changed files with 1 additions and 1 deletions
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2
drivers/char/mem.c
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@@ -248,7 +248,7 @@ static unsigned long get_unmapped_area_mem(struct file *file,
{ {
if (!valid_mmap_phys_addr_range(pgoff, len)) if (!valid_mmap_phys_addr_range(pgoff, len))
return (unsigned long) -EINVAL; return (unsigned long) -EINVAL;
return pgoff; return pgoff << PAGE_SHIFT;
} }
/* can't do an in-place private mapping if there's no MMU */ /* can't do an in-place private mapping if there's no MMU */