3.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: zhendong chen <alex.chen@xxxxxxxxxx>
commit 5164bece1673cdf04782f8ed3fba70743700f5da upstream.
In bio-based DM's clone_endio(), when target_type doesn't implement
.end_io (e.g. linear) r will be always be initialized 0. So if a
WRITE SAME bio fails WRITE SAME will not be disabled as intended.
Fix this by initializing r to error, rather than 0, in clone_endio().
Signed-off-by: Alex Chen <alex.chen@xxxxxxxxxx>
Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx>
Fixes: 7eee4ae2db ("dm: disable WRITE SAME if it fails")
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/md/dm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -899,7 +899,7 @@ static void disable_write_same(struct ma
static void clone_endio(struct bio *bio, int error)
{
- int r = 0;
+ int r = error;
struct dm_target_io *tio = container_of(bio, struct dm_target_io, clone);
struct dm_io *io = tio->io;
struct mapped_device *md = tio->io->md;
--
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