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| author | Darrick J. Wong <darrick.wong@oracle.com> | 2013-09-30 22:45:09 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-30 23:31:02 +0200 |
| commit | 83b2944fd2532b92db099cb3ada12df32a05b368 (patch) | |
| tree | 3968e259fe6bf9625da6c61266aa64d2ffa9c9e0 | |
| parent | kernel/kmod.c: check for NULL in call_usermodehelper_exec() (diff) | |
| download | linux-83b2944fd2532b92db099cb3ada12df32a05b368.tar.xz linux-83b2944fd2532b92db099cb3ada12df32a05b368.zip | |
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.c | 2 |
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; |