diff options
| author | Jarek Poplawski <jarkao2@gmail.com> | 2008-08-11 18:11:06 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-08-11 18:11:06 -0700 |
| commit | 1cfa26661a85549063e369e2b40275eeaa7b923c (patch) | |
| tree | c2d10164ad6b46cd9ac4123a7b2e7b4e2e6ac745 | |
| parent | 0a37c10ed460872d41259659f7f589edebdc42b7 (diff) | |
| download | op-kernel-dev-1cfa26661a85549063e369e2b40275eeaa7b923c.zip op-kernel-dev-1cfa26661a85549063e369e2b40275eeaa7b923c.tar.gz | |
pkt_sched: Add BH protection for qdisc_stab_lock.
Since qdisc_stab_lock is used in qdisc_put_stab(), which is called in
BH context from __qdisc_destroy() RCU callback, softirq safe locking
is needed.
Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/sched/sch_api.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c index bbf149d..c25465e 100644 --- a/net/sched/sch_api.c +++ b/net/sched/sch_api.c @@ -331,7 +331,7 @@ static struct qdisc_size_table *qdisc_get_stab(struct nlattr *opt) if (!s || tsize != s->tsize || (!tab && tsize > 0)) return ERR_PTR(-EINVAL); - spin_lock(&qdisc_stab_lock); + spin_lock_bh(&qdisc_stab_lock); list_for_each_entry(stab, &qdisc_stab_list, list) { if (memcmp(&stab->szopts, s, sizeof(*s))) @@ -339,11 +339,11 @@ static struct qdisc_size_table *qdisc_get_stab(struct nlattr *opt) if (tsize > 0 && memcmp(stab->data, tab, tsize * sizeof(u16))) continue; stab->refcnt++; - spin_unlock(&qdisc_stab_lock); + spin_unlock_bh(&qdisc_stab_lock); return stab; } - spin_unlock(&qdisc_stab_lock); + spin_unlock_bh(&qdisc_stab_lock); stab = kmalloc(sizeof(*stab) + tsize * sizeof(u16), GFP_KERNEL); if (!stab) @@ -354,9 +354,9 @@ static struct qdisc_size_table *qdisc_get_stab(struct nlattr *opt) if (tsize > 0) memcpy(stab->data, tab, tsize * sizeof(u16)); - spin_lock(&qdisc_stab_lock); + spin_lock_bh(&qdisc_stab_lock); list_add_tail(&stab->list, &qdisc_stab_list); - spin_unlock(&qdisc_stab_lock); + spin_unlock_bh(&qdisc_stab_lock); return stab; } @@ -366,14 +366,14 @@ void qdisc_put_stab(struct qdisc_size_table *tab) if (!tab) return; - spin_lock(&qdisc_stab_lock); + spin_lock_bh(&qdisc_stab_lock); if (--tab->refcnt == 0) { list_del(&tab->list); kfree(tab); } - spin_unlock(&qdisc_stab_lock); + spin_unlock_bh(&qdisc_stab_lock); } EXPORT_SYMBOL(qdisc_put_stab); |
