Before remapping a barrier bio, make sure that there are no un-issued
pending I/O in the workqueue. Otherwise a dm_flush would simply add
a barrier request to the underlying device, without issuing the bio's
queued in the dm_crypt device.
Signed-off-by: Nikanth Karthikesan <knikanth@xxxxxxx>
--
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index a936372..be68e70 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -1252,6 +1252,7 @@ static int crypt_map(struct dm_target *ti, struct bio *bio,
if (unlikely(bio_empty_barrier(bio))) {
cc = ti->private;
+ flush_workqueue(cc->io_queue);
bio->bi_bdev = cc->dev->bdev;
return DM_MAPIO_REMAPPED;
}
--
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