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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2007-04-17 01:53:16 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-04-17 19:36:27 -0400
commit8a93258ce302c2b597289770cb7de8dba7c6c219 (patch)
tree6a1ce03d17f7ffdeef57e9ff07804a9fff089fc8 /drivers
parent112654208bd6f092e064973b8fa680e37ffa74a6 (diff)
fix bogon in /dev/mem mmap'ing on nommu
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/char/mem.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index f5c160caf9f4..5f066963f171 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -248,7 +248,7 @@ static unsigned long get_unmapped_area_mem(struct file *file,
248{ 248{
249 if (!valid_mmap_phys_addr_range(pgoff, len)) 249 if (!valid_mmap_phys_addr_range(pgoff, len))
250 return (unsigned long) -EINVAL; 250 return (unsigned long) -EINVAL;
251 return pgoff; 251 return pgoff << PAGE_SHIFT;
252} 252}
253 253
254/* can't do an in-place private mapping if there's no MMU */ 254/* can't do an in-place private mapping if there's no MMU */