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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
parent4c1c7be95c345cf2ad537a0c48e9aeadc7304527 (diff)
downloadop-kernel-dev-83b2944fd2532b92db099cb3ada12df32a05b368.zip
op-kernel-dev-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>
-rw-r--r--mm/bounce.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/bounce.c b/mm/bounce.c
index c9f0a43..5a7d58f 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;
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