[patch 013/104] lib/scatterlist.c: fix kunmap() argument insg_miter_stop()

From: Greg KH
Date: Wed Dec 03 2008 - 14:55:38 EST

2.6.27-stable review patch. If anyone has any objections, please let us know.

From: Arjan van de Ven <arjan@xxxxxxxxxxxxx>

commit f652c521e0bec2e70cf123f47e80117a7e6ed139 upstream.

kunmap() takes as argument the struct page that orginally got kmap()'d,
however the sg_miter_stop() function passed it the kernel virtual address
instead, resulting in weird stuff.

Somehow I ended up fixing this bug by accident while looking for a bug in
the same area.

Reported-by: kerneloops.org
Acked-by: Tejun Heo <tj@xxxxxxxxxx>
Signed-off-by: Arjan van de Ven <arjan@xxxxxxxxxxxxxxx>
Cc: Hugh Dickins <hugh@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

lib/scatterlist.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/lib/scatterlist.c
+++ b/lib/scatterlist.c
@@ -395,7 +395,7 @@ void sg_miter_stop(struct sg_mapping_ite
kunmap_atomic(miter->addr, KM_BIO_SRC_IRQ);
} else
- kunmap(miter->addr);
+ kunmap(miter->page);

miter->page = NULL;
miter->addr = NULL;

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