f2fs: iput only if whole data blocks are flushed

If there remains some unwritten blocks from the recovery, we should not call
iput on that directory inode.
Otherwise, we can loose some dentry blocks after the recovery.
Signed-off-by: NJaegeuk Kim <jaegeuk.kim@samsung.com>

fs/f2fs/checkpoint.c

@@ -501,8 +501,10 @@ void remove_dirty_dir_inode(struct inode *inode)
 		return;
 
 	spin_lock(&sbi->dir_inode_lock);
-	if (atomic_read(&F2FS_I(inode)->dirty_dents))
-		goto out;
+	if (atomic_read(&F2FS_I(inode)->dirty_dents)) {
+		spin_unlock(&sbi->dir_inode_lock);
+		return;
+	}
 
 	list_for_each(this, head) {
 		struct dir_inode_entry *entry;
@@ -516,7 +518,6 @@ void remove_dirty_dir_inode(struct inode *inode)
 			break;
 		}
 	}
-out:
 	spin_unlock(&sbi->dir_inode_lock);
 
 	/* Only from the recovery routine */