diff options
| -rw-r--r-- | net/sched/sch_gred.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/net/sched/sch_gred.c b/net/sched/sch_gred.c index 1b5e63126cb3..53204de71c39 100644 --- a/net/sched/sch_gred.c +++ b/net/sched/sch_gred.c @@ -380,18 +380,19 @@ static inline int gred_change_table_def(struct Qdisc *sch, struct nlattr *dps) static inline int gred_change_vq(struct Qdisc *sch, int dp, struct tc_gred_qopt *ctl, int prio, - u8 *stab, u32 max_P) + u8 *stab, u32 max_P, + struct gred_sched_data **prealloc) { struct gred_sched *table = qdisc_priv(sch); - struct gred_sched_data *q; + struct gred_sched_data *q = table->tab[dp]; - if (table->tab[dp] == NULL) { - table->tab[dp] = kzalloc(sizeof(*q), GFP_ATOMIC); - if (table->tab[dp] == NULL) + if (!q) { + table->tab[dp] = q = *prealloc; + *prealloc = NULL; + if (!q) return -ENOMEM; } - q = table->tab[dp]; q->DP = dp; q->prio = prio; q->limit = ctl->limit; @@ -421,6 +422,7 @@ static int gred_change(struct Qdisc *sch, struct nlattr *opt) int err, prio = GRED_DEF_PRIO; u8 *stab; u32 max_P; + struct gred_sched_data *prealloc; if (opt == NULL) return -EINVAL; @@ -460,9 +462,10 @@ static int gred_change(struct Qdisc *sch, struct nlattr *opt) prio = ctl->prio; } + prealloc = kzalloc(sizeof(*prealloc), GFP_KERNEL); sch_tree_lock(sch); - err = gred_change_vq(sch, ctl->DP, ctl, prio, stab, max_P); + err = gred_change_vq(sch, ctl->DP, ctl, prio, stab, max_P, &prealloc); if (err < 0) goto errout_locked; @@ -476,6 +479,7 @@ static int gred_change(struct Qdisc *sch, struct nlattr *opt) errout_locked: sch_tree_unlock(sch); + kfree(prealloc); errout: return err; } |