quota: Fix quota corruption with generic/232 test

[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 c0187cda2c1ed3ff65b449a74aa71c05ca29eb58..a73e5b34db4181272bc943c4e0ea406797ff0311 100644 (file)
--- a/fs/quota/quota_v2.c
+++ b/fs/quota/quota_v2.c
@@ -328,12 +328,16 @@ static int v2_write_dquot(struct dquot *dquot)
        if (!dquot->dq_off) {
                alloc = true;
                down_write(&dqopt->dqio_sem);
+       } else {
+               down_read(&dqopt->dqio_sem);
        }
        ret = qtree_write_dquot(
                        sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv,
                        dquot);
        if (alloc)
                up_write(&dqopt->dqio_sem);
+       else
+               up_read(&dqopt->dqio_sem);
        return ret;
 }