[dm-devel] [PATCH v1] dm writecache: handle REQ_FUA

[Maged Mokhtar]

Call writecache_flush() on REQ_FUA

Signed-off-by: Maged Mokhtar <mmokhtar at petasan.org>
Acked-By: Mikulas Patocka <mpatocka at redhat.com>
Cc: stable at vger.kernel.org	# 4.18+
---
  drivers/md/dm-writecache.c |    3 ++-
  1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/md/dm-writecache.c    2019-10-23 22:01:18.480115962 +0200
+++ b/drivers/md/dm-writecache.c    2019-10-23 22:02:08.616113729 +0200
@@ -1218,7 +1218,8 @@ bio_copy:
              }
          } while (bio->bi_iter.bi_size);

-        if (unlikely(wc->uncommitted_blocks >= wc->autocommit_blocks))
+        if (unlikely(bio->bi_opf & REQ_FUA ||
+                wc->uncommitted_blocks >= wc->autocommit_blocks))
              writecache_flush(wc);
          else
              writecache_schedule_autocommit(wc);