In dquot_writeback_dquots(), we write back dquot from dirty dquots
list. There is a potential infinite loop if ->write_dquot() failure
and forget remove dquot from the list. This patch clear dirty bit
anyway to avoid it.
Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
Signed-off-by: Jan Kara <jack@suse.cz>
spin_unlock(&dq_list_lock);
dqstats_inc(DQST_LOOKUPS);
err = sb->dq_op->write_dquot(dquot);
- if (!ret && err)
- ret = err;
+ if (err) {
+ /*
+ * Clear dirty bit anyway to avoid infinite
+ * loop here.
+ */
+ clear_dquot_dirty(dquot);
+ if (!ret)
+ ret = err;
+ }
dqput(dquot);
spin_lock(&dq_list_lock);
}