libceph: put request only if it's done in handle_reply()

handle_reply() may be called twice on the same request: on ack and then
on commit.  This occurs on btrfs-formatted OSDs or if cephfs sync write
path is triggered - CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK.

handle_reply() handles this with the help of done_request().

Fixes: 5aea3dcd5021 ("libceph: a major OSD client update")
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index 79c3bad..cfe0be8 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -2892,6 +2892,9 @@
 			dout("req %p tid %llu cb\n", req, req->r_tid);
 			__complete_request(req);
 		}
+		if (m.flags & CEPH_OSD_FLAG_ONDISK)
+			complete_all(&req->r_safe_completion);
+		ceph_osdc_put_request(req);
 	} else {
 		if (req->r_unsafe_callback) {
 			dout("req %p tid %llu unsafe-cb\n", req, req->r_tid);
@@ -2900,10 +2903,7 @@
 			WARN_ON(1);
 		}
 	}
-	if (m.flags & CEPH_OSD_FLAG_ONDISK)
-		complete_all(&req->r_safe_completion);
 
-	ceph_osdc_put_request(req);
 	return;
 
 fail_request: