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path: root/fs/quota/quota_v1.c
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Diffstat (limited to 'fs/quota/quota_v1.c')
-rw-r--r--fs/quota/quota_v1.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/quota/quota_v1.c b/fs/quota/quota_v1.c
index 12d69cda57cc..94cceb76b9a3 100644
--- a/fs/quota/quota_v1.c
+++ b/fs/quota/quota_v1.c
@@ -83,7 +83,9 @@ static int v1_commit_dqblk(struct dquot *dquot)
short type = dquot->dq_id.type;
ssize_t ret;
struct v1_disk_dqblk dqblk;
+ struct quota_info *dqopt = sb_dqopt(dquot->dq_sb);
+ down_write(&dqopt->dqio_sem);
v1_mem2disk_dqblk(&dqblk, &dquot->dq_dqb);
if (((type == USRQUOTA) && uid_eq(dquot->dq_id.uid, GLOBAL_ROOT_UID)) ||
((type == GRPQUOTA) && gid_eq(dquot->dq_id.gid, GLOBAL_ROOT_GID))) {
@@ -97,6 +99,7 @@ static int v1_commit_dqblk(struct dquot *dquot)
ret = dquot->dq_sb->s_op->quota_write(dquot->dq_sb, type,
(char *)&dqblk, sizeof(struct v1_disk_dqblk),
v1_dqoff(from_kqid(&init_user_ns, dquot->dq_id)));
+ up_write(&dqopt->dqio_sem);
if (ret != sizeof(struct v1_disk_dqblk)) {
quota_error(dquot->dq_sb, "dquota write failed");
if (ret >= 0)