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authorDarrick J. Wong <darrick.wong@oracle.com>2013-09-30 13:45:09 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-09-30 14:31:02 -0700
commit83b2944fd2532b92db099cb3ada12df32a05b368 (patch)
tree3968e259fe6bf9625da6c61266aa64d2ffa9c9e0 /mm
parent4c1c7be95c345cf2ad537a0c48e9aeadc7304527 (diff)
downloadlinux-stericsson-83b2944fd2532b92db099cb3ada12df32a05b368.tar.gz
mm/bounce.c: fix a regression where MS_SNAP_STABLE (stable pages snapshotting) was ignored
The "force" parameter in __blk_queue_bounce was being ignored, which means that stable page snapshots are not always happening (on ext3). This of course leads to DIF disks reporting checksum errors, so fix this regression. The regression was introduced in commit 6bc454d15004 ("bounce: Refactor __blk_queue_bounce to not use bi_io_vec") Reported-by: Mel Gorman <mgorman@suse.de> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Cc: Kent Overstreet <koverstreet@google.com> Cc: <stable@vger.kernel.org> [3.10+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/bounce.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/bounce.c b/mm/bounce.c
index c9f0a4339a7d..5a7d58fb883b 100644
--- a/mm/bounce.c
+++ b/mm/bounce.c
@@ -204,6 +204,8 @@ static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig,
struct bio_vec *to, *from;
unsigned i;
+ if (force)
+ goto bounce;
bio_for_each_segment(from, *bio_orig, i)
if (page_to_pfn(from->bv_page) > queue_bounce_pfn(q))
goto bounce;