drbd: Do not try to free tl_hash in drbd_disconnect() when IO is suspended

We may not free tl_hash when IO is suspended, since we can not wait
until ap_bio_cnt reaches zero.

We can do this after susp reched 0, since then tl_clear was called

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 9fe9bdd9e33d..8d14635e7faf 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -1409,6 +1409,10 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os,
             (os.user_isp && !ns.user_isp))
                 resume_next_sg(mdev);
 
+        /* free tl_hash if we Got thawed and are C_STANDALONE */
+        if (ns.conn == C_STANDALONE && ns.susp == 0 && mdev->tl_hash)
+                drbd_free_tl_hash(mdev);
+
         /* Upon network connection, we need to start the receiver */
         if (os.conn == C_STANDALONE && ns.conn == C_UNCONNECTED)
                 drbd_thread_start(&mdev->receiver);