ocfs2: fix mutex_unlock and possible memory leak in ocfs2_remove_btree_range

In ocfs2_remove_btree_range, when calling ocfs2_lock_refcount_tree and ocfs2_prepare_refcount_change_for_del failed, it goes to out and then tries to call mutex_unlock without mutex_lock before.
And when calling ocfs2_reserve_blocks_for_rec_trunc
failed, it should free ref_tree before return.

Signed-off-by Joseph Qi <[email protected]>

---
 fs/ocfs2/alloc.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

fs/ocfs2/alloc.c +4 -5

index b8a9d87..17e6bdd 100644
@@ -5655,7 +5655,7 @@ int ocfs2_remove_btree_range(struct inode *inode,
 					       &ref_tree, NULL);
 		if (ret) {
 			mlog_errno(ret);
-			goto out;
+			goto bail;
 		}
 
 		ret = ocfs2_prepare_refcount_change_for_del(inode,

@@ -5666,7 +5666,7 @@ int ocfs2_remove_btree_range(struct inode *inode,
 							    &extra_blocks);
 		if (ret < 0) {
 			mlog_errno(ret);
-			goto out;
+			goto bail;
 		}
 	}
 

@@ -5674,7 +5674,7 @@ int ocfs2_remove_btree_range(struct inode *inode,
 						 extra_blocks);
 	if (ret) {
 		mlog_errno(ret);
-		return ret;
+		goto bail;
 	}
 
 	mutex_lock(&tl_inode->i_mutex);

@@ -5734,7 +5734,7 @@ out_commit:
 	ocfs2_commit_trans(osb, handle);
 out:
 	mutex_unlock(&tl_inode->i_mutex);
-
+bail:
 	if (meta_ac)
 		ocfs2_free_alloc_context(meta_ac);
 
-- 1.7.9.7