From: Arjan van de Ven <arjan@infradead.org>
Date: Wed, 19 Nov 2008 23:36:19 +0000 (-0800)
Subject: lib/scatterlist.c: fix kunmap() argument in sg_miter_stop()
X-Git-Tag: v2.6.28-rc6~39
X-Git-Url: http://pilppa.org/gitweb/?a=commitdiff_plain;h=f652c521e0bec2e70cf123f47e80117a7e6ed139;p=linux-2.6-omap-h63xx.git

lib/scatterlist.c: fix kunmap() argument in sg_miter_stop()

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@kernel.org>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: <stable@kernel.org>		[2.6.27.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/lib/scatterlist.c b/lib/scatterlist.c
index 8d2688ff135..b7b449dafbe 100644
--- a/lib/scatterlist.c
+++ b/lib/scatterlist.c
@@ -395,7 +395,7 @@ void sg_miter_stop(struct sg_mapping_iter *miter)
 			WARN_ON(!irqs_disabled());
 			kunmap_atomic(miter->addr, KM_BIO_SRC_IRQ);
 		} else
-			kunmap(miter->addr);
+			kunmap(miter->page);
 
 		miter->page = NULL;
 		miter->addr = NULL;