quota: Push dqio_sem down to ->read_dqblk()

[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 ca71bf881ad1e33d11c1fdd10b71070c5079358d..b2cd34f6b3da8bb17a6fdfe1d10018250b5f162b 100644 (file)
--- a/fs/quota/quota_v2.c
+++ b/fs/quota/quota_v2.c
@@ -285,7 +285,15 @@ static int v2r1_is_id(void *dp, struct dquot *dquot)
 
 static int v2_read_dquot(struct dquot *dquot)
 {
-       return qtree_read_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv, dquot);
+       struct quota_info *dqopt = sb_dqopt(dquot->dq_sb);
+       int ret;
+
+       down_read(&dqopt->dqio_sem);
+       ret = qtree_read_dquot(
+                       sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv,
+                       dquot);
+       up_read(&dqopt->dqio_sem);
+       return ret;
 }
 
 static int v2_write_dquot(struct dquot *dquot)