mds: properly execute scrub finish context

Bug was introduced by commit 7e52729699 (mds: flush after scrub repairs)

Fixes: http://tracker.ceph.com/issues/22058
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
(cherry picked from commit ff71fbdcbb87ffc9baa02319ff0f336c173c5616)

diff --git a/src/mds/MDCache.cc b/src/mds/MDCache.cc
index 9b111ac5b209388780c4524a9266277511e76a82..b33d498c17655171bfdc4866f9d30388576c6c07 100644 (file)
--- a/src/mds/MDCache.cc
+++ b/src/mds/MDCache.cc
@@ -12114,7 +12114,7 @@ void MDCache::enqueue_scrub_work(MDRequestRef& mdr)
 
   Context *fin = nullptr;
   if (!header->get_recursive()) {
-    cs->take_finisher();
+    fin = cs->take_finisher();
   }
 
   // If the scrub did some repair, then flush the journal at the end of