Eric Lee / smarc-ti-linux-kernel | Embedian Git Server

Commit 83b2944fd2532b92db099cb3ada12df32a05b368

Authored by Darrick J. Wong 2013-10-01 04:45:09 +0800

Committed by Linus Torvalds 2013-10-01 05:31:02 +0800

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>

Showing 1 changed file with 2 additions and 0 deletions Side-by-side Diff

mm/bounce.c

mm/bounce.c

Diff comments View file @ 83b2944

...	...	@@ -204,6 +204,8 @@
204	204	struct bio_vec to, from;
205	205	unsigned i;
206	206
	207	+ if (force)
	208	+ goto bounce;
207	209	bio_for_each_segment(from, *bio_orig, i)
208	210	if (page_to_pfn(from->bv_page) > queue_bounce_pfn(q))
209	211	goto bounce;