netdev - [RFC PATCH net-next 08/12] net: dsa: use dsa_tree_for_each_cpu_port in dsa_tree_{setup,teardown}

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Message-Id: <20220523104256.3556016-9-olteanv@gmail.com>
Date:   Mon, 23 May 2022 13:42:52 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     netdev@...r.kernel.org
Cc:     Jakub Kicinski <kuba@...nel.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vladimir Oltean <olteanv@...il.com>,
        Tobias Waldekranz <tobias@...dekranz.com>,
        Marek Behún <kabel@...nel.org>,
        Ansuel Smith <ansuelsmth@...il.com>,
        DENG Qingfang <dqfext@...il.com>,
        Alvin Šipraga <alsi@...g-olufsen.dk>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        UNGLinuxDriver@...rochip.com,
        Colin Foster <colin.foster@...advantage.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Luiz Angelo Daros de Luca <luizluca@...il.com>,
        Roopa Prabhu <roopa@...dia.com>,
        Nikolay Aleksandrov <razor@...ckwall.org>,
        Frank Wunderlich <frank-w@...lic-files.de>,
        Vladimir Oltean <vladimir.oltean@....com>
Subject: [RFC PATCH net-next 08/12] net: dsa: use dsa_tree_for_each_cpu_port in dsa_tree_{setup,teardown}_master

From: Vladimir Oltean <vladimir.oltean@....com>

More logic will be added to dsa_tree_setup_master() and
dsa_tree_teardown_master() in upcoming changes.

Reduce the indentation by one level in these functions by introducing
and using a dedicated iterator for CPU ports of a tree.

Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
 include/net/dsa.h |  4 ++++
 net/dsa/dsa2.c    | 46 +++++++++++++++++++++-------------------------
 2 files changed, 25 insertions(+), 25 deletions(-)

diff --git a/include/net/dsa.h b/include/net/dsa.h
index 14f07275852b..ad345fa17297 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -555,6 +555,10 @@ static inline bool dsa_is_user_port(struct dsa_switch *ds, int p)
 	list_for_each_entry((_dp), &(_dst)->ports, list) \
 		if (dsa_port_is_user((_dp)))
 
+#define dsa_tree_for_each_cpu_port(_dp, _dst) \
+	list_for_each_entry((_dp), &(_dst)->ports, list) \
+		if (dsa_port_is_cpu((_dp)))
+
 #define dsa_switch_for_each_port(_dp, _ds) \
 	list_for_each_entry((_dp), &(_ds)->dst->ports, list) \
 		if ((_dp)->ds == (_ds))
diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index 4f0042339d4f..74167bf0fbe5 100644
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -1043,26 +1043,24 @@ static int dsa_tree_setup_switches(struct dsa_switch_tree *dst)
 
 static int dsa_tree_setup_master(struct dsa_switch_tree *dst)
 {
-	struct dsa_port *dp;
+	struct dsa_port *cpu_dp;
 	int err = 0;
 
 	rtnl_lock();
 
-	list_for_each_entry(dp, &dst->ports, list) {
-		if (dsa_port_is_cpu(dp)) {
-			struct net_device *master = dp->master;
-			bool admin_up = (master->flags & IFF_UP) &&
-					!qdisc_tx_is_noop(master);
+	dsa_tree_for_each_cpu_port(cpu_dp, dst) {
+		struct net_device *master = cpu_dp->master;
+		bool admin_up = (master->flags & IFF_UP) &&
+				!qdisc_tx_is_noop(master);
 
-			err = dsa_master_setup(master, dp);
-			if (err)
-				break;
+		err = dsa_master_setup(master, cpu_dp);
+		if (err)
+			break;
 
-			/* Replay master state event */
-			dsa_tree_master_admin_state_change(dst, master, admin_up);
-			dsa_tree_master_oper_state_change(dst, master,
-							  netif_oper_up(master));
-		}
+		/* Replay master state event */
+		dsa_tree_master_admin_state_change(dst, master, admin_up);
+		dsa_tree_master_oper_state_change(dst, master,
+						  netif_oper_up(master));
 	}
 
 	rtnl_unlock();
@@ -1072,22 +1070,20 @@ static int dsa_tree_setup_master(struct dsa_switch_tree *dst)
 
 static void dsa_tree_teardown_master(struct dsa_switch_tree *dst)
 {
-	struct dsa_port *dp;
+	struct dsa_port *cpu_dp;
 
 	rtnl_lock();
 
-	list_for_each_entry(dp, &dst->ports, list) {
-		if (dsa_port_is_cpu(dp)) {
-			struct net_device *master = dp->master;
+	dsa_tree_for_each_cpu_port(cpu_dp, dst) {
+		struct net_device *master = cpu_dp->master;
 
-			/* Synthesizing an "admin down" state is sufficient for
-			 * the switches to get a notification if the master is
-			 * currently up and running.
-			 */
-			dsa_tree_master_admin_state_change(dst, master, false);
+		/* Synthesizing an "admin down" state is sufficient for
+		 * the switches to get a notification if the master is
+		 * currently up and running.
+		 */
+		dsa_tree_master_admin_state_change(dst, master, false);
 
-			dsa_master_teardown(master);
-		}
+		dsa_master_teardown(master);
 	}
 
 	rtnl_unlock();
-- 
2.25.1