quota: Push dqio_sem down to ->get_next_id()

[sfrench/cifs-2.6.git] / fs / quota / quota_v2.c

diff --git a/fs/quota/quota_v2.c b/fs/quota/quota_v2.c
index 8f54b159e4236c1cafdfa46985161324185bb59e..f82638e43c07d20074c13ab2a70b0da59ba6b410 100644 (file)
--- a/fs/quota/quota_v2.c
+++ b/fs/quota/quota_v2.c
@@ -340,7 +340,13 @@ static int v2_free_file_info(struct super_block *sb, int type)
 
 static int v2_get_next_id(struct super_block *sb, struct kqid *qid)
 {
-       return qtree_get_next_id(sb_dqinfo(sb, qid->type)->dqi_priv, qid);
+       struct quota_info *dqopt = sb_dqopt(sb);
+       int ret;
+
+       down_read(&dqopt->dqio_sem);
+       ret = qtree_get_next_id(sb_dqinfo(sb, qid->type)->dqi_priv, qid);
+       up_read(&dqopt->dqio_sem);
+       return ret;
 }
 
 static const struct quota_format_ops v2_format_ops = {