[PATCH] Btrfs: make sure to unblock the transaction when cleaning it up

[Josef Bacik <josef@redhat.com>]

When a transaction aborts we can get stuck in places where tasks are waiting
for the transaction to become unblocked.  So we need to unblock the
transaction and wake up any waiters so they can exit properly.  Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>
---
 fs/btrfs/transaction.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 7aed0e8..1715afb 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -1204,9 +1204,16 @@ static void cleanup_transaction(struct btrfs_trans_handle *trans,
 	WARN_ON(trans->use_count > 1);
 
 	spin_lock(&root->fs_info->trans_lock);
+	cur_trans->blocked = 0;
 	list_del_init(&cur_trans->list);
+	if (root->fs_info->running_transaction == cur_trans) {
+		root->fs_info->running_transaction = NULL;
+		root->fs_info->trans_no_join = 0;
+	}
 	spin_unlock(&root->fs_info->trans_lock);
 
+	wake_up(&root->fs_info->transaction_wait);
+
 	btrfs_cleanup_one_transaction(trans->transaction, root);
 
 	put_transaction(cur_trans);
-- 
1.7.7.6