Merge branch 'sch_api-style'

Alexander Aring says:

====================
net: sched: sch_api: fix coding style issues for extack

this patch prepares to handle extack for qdiscs and fixes checkpatch
issues.

There are a bunch of warnings issued by checkpatch which bothered me.
This first patchset is to get rid of those warnings to make way for
the next patchsets.

I plan to followup with qdiscs, classifiers and actions after this.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/sch_generic.h

@@ -161,7 +161,8 @@ struct Qdisc_class_ops {
 	void			(*walk)(struct Qdisc *, struct qdisc_walker * arg);
 
 	/* Filter manipulation */
-	struct tcf_block *	(*tcf_block)(struct Qdisc *, unsigned long);
+	struct tcf_block *	(*tcf_block)(struct Qdisc *sch,
+					     unsigned long arg);
 	unsigned long		(*bind_tcf)(struct Qdisc *, unsigned long,
 					u32 classid);
 	void			(*unbind_tcf)(struct Qdisc *, unsigned long);
@@ -185,11 +186,12 @@ struct Qdisc_ops {
 	struct sk_buff *	(*dequeue)(struct Qdisc *);
 	struct sk_buff *	(*peek)(struct Qdisc *);
 
-	int			(*init)(struct Qdisc *, struct nlattr *arg);
+	int			(*init)(struct Qdisc *sch, struct nlattr *arg);
 	void			(*reset)(struct Qdisc *);
 	void			(*destroy)(struct Qdisc *);
-	int			(*change)(struct Qdisc *, struct nlattr *arg);
-	void			(*attach)(struct Qdisc *);
+	int			(*change)(struct Qdisc *sch,
+					  struct nlattr *arg);
+	void			(*attach)(struct Qdisc *sch);
 
 	int			(*dump)(struct Qdisc *, struct sk_buff *);
 	int			(*dump_stats)(struct Qdisc *, struct gnet_dump *);

net/sched/sch_api.c

@@ -1020,7 +1020,7 @@ static struct Qdisc *qdisc_create(struct net_device *dev,
 #endif
 
 	err = -ENOENT;
-	if (ops == NULL)
+	if (!ops)
 		goto err_out;
 
 	sch = qdisc_alloc(dev_queue, ops);
@@ -1060,7 +1060,12 @@ static struct Qdisc *qdisc_create(struct net_device *dev,
 		netdev_info(dev, "Caught tx_queue_len zero misconfig\n");
 	}
 
-	if (!ops->init || (err = ops->init(sch, tca[TCA_OPTIONS])) == 0) {
+	if (ops->init) {
+		err = ops->init(sch, tca[TCA_OPTIONS]);
+		if (err != 0)
+			goto err_out5;
+	}
+
 	if (qdisc_is_percpu_stats(sch)) {
 		sch->cpu_bstats =
 			netdev_alloc_pcpu_stats(struct gnet_stats_basic_cpu);
@@ -1087,7 +1092,7 @@ static struct Qdisc *qdisc_create(struct net_device *dev,
 		if (sch->flags & TCQ_F_MQROOT)
 			goto err_out4;
 
-			if ((sch->parent != TC_H_ROOT) &&
+		if (sch->parent != TC_H_ROOT &&
 		    !(sch->flags & TCQ_F_INGRESS) &&
 		    (!p || !(p->flags & TCQ_F_MQROOT)))
 			running = qdisc_root_sleeping_running(sch);
@@ -1107,7 +1112,8 @@ static struct Qdisc *qdisc_create(struct net_device *dev,
 	qdisc_hash_add(sch, false);
 
 	return sch;
-	}
+
+err_out5:
 	/* ops->init() failed, we call ->destroy() like qdisc_create_dflt() */
 	if (ops->destroy)
 		ops->destroy(sch);
@@ -1139,7 +1145,7 @@ static int qdisc_change(struct Qdisc *sch, struct nlattr **tca)
 	int err = 0;
 
 	if (tca[TCA_OPTIONS]) {
-		if (sch->ops->change == NULL)
+		if (!sch->ops->change)
 			return -EINVAL;
 		err = sch->ops->change(sch, tca[TCA_OPTIONS]);
 		if (err)
@@ -1344,7 +1350,8 @@ static int tc_modify_qdisc(struct sk_buff *skb, struct nlmsghdr *n,
 					goto create_n_graft;
 				if (n->nlmsg_flags & NLM_F_EXCL)
 					return -EEXIST;
-				if (tca[TCA_KIND] && nla_strcmp(tca[TCA_KIND], q->ops->id))
+				if (tca[TCA_KIND] &&
+				    nla_strcmp(tca[TCA_KIND], q->ops->id))
 					return -EINVAL;
 				if (q == p ||
 				    (p && check_loop(q, p, 0)))
@@ -1389,7 +1396,7 @@ static int tc_modify_qdisc(struct sk_buff *skb, struct nlmsghdr *n,
 	}
 
 	/* Change qdisc parameters */
-	if (q == NULL)
+	if (!q)
 		return -ENOENT;
 	if (n->nlmsg_flags & NLM_F_EXCL)
 		return -EEXIST;