netdev - [PATCH RESEND v3 net-next 3/7] net: dsa: do not open-code dsa_switch_for_each

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Date:   Wed, 20 Oct 2021 20:49:51 +0300
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     netdev@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Vladimir Oltean <olteanv@...il.com>
Subject: [PATCH RESEND v3 net-next 3/7] net: dsa: do not open-code dsa_switch_for_each_port

Find the remaining iterators over dst->ports that only filter for the
ports belonging to a certain switch, and replace those with the
dsa_switch_for_each_port helper that we have now.

Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
 net/dsa/dsa2.c | 44 ++++++++++++++------------------------------
 1 file changed, 14 insertions(+), 30 deletions(-)

diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index 1c09182b3644..2a339fb09f4e 100644
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -399,11 +399,8 @@ static int dsa_tree_setup_cpu_ports(struct dsa_switch_tree *dst)
 		if (!dsa_port_is_cpu(cpu_dp))
 			continue;
 
-		list_for_each_entry(dp, &dst->ports, list) {
-			/* Prefer a local CPU port */
-			if (dp->ds != cpu_dp->ds)
-				continue;
-
+		/* Prefer a local CPU port */
+		dsa_switch_for_each_port(dp, cpu_dp->ds) {
 			/* Prefer the first local CPU port found */
 			if (dp->cpu_dp)
 				continue;
@@ -852,12 +849,10 @@ static int dsa_switch_setup(struct dsa_switch *ds)
 	/* Setup devlink port instances now, so that the switch
 	 * setup() can register regions etc, against the ports
 	 */
-	list_for_each_entry(dp, &ds->dst->ports, list) {
-		if (dp->ds == ds) {
-			err = dsa_port_devlink_setup(dp);
-			if (err)
-				goto unregister_devlink_ports;
-		}
+	dsa_switch_for_each_port(dp, ds) {
+		err = dsa_port_devlink_setup(dp);
+		if (err)
+			goto unregister_devlink_ports;
 	}
 
 	err = dsa_switch_register_notifier(ds);
@@ -901,9 +896,8 @@ static int dsa_switch_setup(struct dsa_switch *ds)
 unregister_notifier:
 	dsa_switch_unregister_notifier(ds);
 unregister_devlink_ports:
-	list_for_each_entry(dp, &ds->dst->ports, list)
-		if (dp->ds == ds)
-			dsa_port_devlink_teardown(dp);
+	dsa_switch_for_each_port(dp, ds)
+		dsa_port_devlink_teardown(dp);
 	devlink_free(ds->devlink);
 	ds->devlink = NULL;
 	return err;
@@ -931,9 +925,8 @@ static void dsa_switch_teardown(struct dsa_switch *ds)
 	dsa_switch_unregister_notifier(ds);
 
 	if (ds->devlink) {
-		list_for_each_entry(dp, &ds->dst->ports, list)
-			if (dp->ds == ds)
-				dsa_port_devlink_teardown(dp);
+		dsa_switch_for_each_port(dp, ds)
+			dsa_port_devlink_teardown(dp);
 		devlink_free(ds->devlink);
 		ds->devlink = NULL;
 	}
@@ -1180,8 +1173,8 @@ static struct dsa_port *dsa_port_touch(struct dsa_switch *ds, int index)
 	struct dsa_switch_tree *dst = ds->dst;
 	struct dsa_port *dp;
 
-	list_for_each_entry(dp, &dst->ports, list)
-		if (dp->ds == ds && dp->index == index)
+	dsa_switch_for_each_port(dp, ds)
+		if (dp->index == index)
 			return dp;
 
 	dp = kzalloc(sizeof(*dp), GFP_KERNEL);
@@ -1522,12 +1515,9 @@ static int dsa_switch_parse(struct dsa_switch *ds, struct dsa_chip_data *cd)
 
 static void dsa_switch_release_ports(struct dsa_switch *ds)
 {
-	struct dsa_switch_tree *dst = ds->dst;
 	struct dsa_port *dp, *next;
 
-	list_for_each_entry_safe(dp, next, &dst->ports, list) {
-		if (dp->ds != ds)
-			continue;
+	dsa_switch_for_each_port_safe(dp, next, ds) {
 		list_del(&dp->list);
 		kfree(dp);
 	}
@@ -1619,13 +1609,7 @@ void dsa_switch_shutdown(struct dsa_switch *ds)
 	mutex_lock(&dsa2_mutex);
 	rtnl_lock();
 
-	list_for_each_entry(dp, &ds->dst->ports, list) {
-		if (dp->ds != ds)
-			continue;
-
-		if (!dsa_port_is_user(dp))
-			continue;
-
+	dsa_switch_for_each_user_port(dp, ds) {
 		master = dp->cpu_dp->master;
 		slave_dev = dp->slave;
 
-- 
2.25.1