| From 83b2944fd2532b92db099cb3ada12df32a05b368 Mon Sep 17 00:00:00 2001 |
| From: "Darrick J. Wong" <darrick.wong@oracle.com> |
| Date: Mon, 30 Sep 2013 13:45:09 -0700 |
| Subject: mm/bounce.c: fix a regression where MS_SNAP_STABLE (stable pages snapshotting) was ignored |
| |
| From: "Darrick J. Wong" <darrick.wong@oracle.com> |
| |
| commit 83b2944fd2532b92db099cb3ada12df32a05b368 upstream. |
| |
| 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> |
| Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
| Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| mm/bounce.c | 2 ++ |
| 1 file changed, 2 insertions(+) |
| |
| --- a/mm/bounce.c |
| +++ b/mm/bounce.c |
| @@ -204,6 +204,8 @@ static void __blk_queue_bounce(struct re |
| 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; |
