[PATCH] f2fs: delete and free dirty dir freeing inode entry when sync dirty dir inodes

[Gu Zheng <guz.fnst@cn.fujitsu.com>]

In sync_dirty_dir_inodes(), remove_dirty_dir_inode() will be called
in the callback of filemap_flush to delete and free dirty dir inode entry.
But for the freeing inode entry, missed this step after sbumit data bio,
and this may lead to a dead loop if these is freeing inode entry in
dir_inode_list. So add the delete and free step to fix it.

Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
---
 fs/f2fs/checkpoint.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 8d16071..f61838f 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -600,7 +600,16 @@ retry:
 		 * wribacking dentry pages in the freeing inode.
 		 */
 		f2fs_submit_bio(sbi, DATA, true);
+
+		spin_lock(&sbi->dir_inode_lock);
+		list_del(&entry->list);
+#ifdef CONFIG_F2FS_STAT_FS
+		sbi->n_dirty_dirs--;
+#endif
+		spin_unlock(&sbi->dir_inode_lock);
+		kmem_cache_free(inode_entry_slab, entry);
 	}
+
 	goto retry;
 }
 
-- 
1.7.7