linux-kernel - [PATCH v1 25/26] net: dsa: microchip: remove ksz

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Date:   Mon, 28 Nov 2022 13:00:33 +0100
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     Woojung Huh <woojung.huh@...rochip.com>,
        UNGLinuxDriver@...rochip.com, Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     Oleksij Rempel <o.rempel@...gutronix.de>, kernel@...gutronix.de,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        Arun.Ramadoss@...rochip.com
Subject: [PATCH v1 25/26] net: dsa: microchip: remove ksz_port:on variable

The only place where this variable would be set to false is the
ksz8_config_cpu_port() function. But it is done in a bogus way:

 	for (i = 0; i < dev->phy_port_cnt; i++) {
		if (i == dev->phy_port_cnt) <--- will be never executed.
			break;
		p->on = 1;

So, we never have a situation where p->on = 0. In this case, we can just
remove it.

Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
---
 drivers/net/dsa/microchip/ksz8795.c    | 20 +-------------------
 drivers/net/dsa/microchip/ksz_common.h |  1 -
 2 files changed, 1 insertion(+), 20 deletions(-)

diff --git a/drivers/net/dsa/microchip/ksz8795.c b/drivers/net/dsa/microchip/ksz8795.c
index ea08bdea193e..618366fadfb5 100644
--- a/drivers/net/dsa/microchip/ksz8795.c
+++ b/drivers/net/dsa/microchip/ksz8795.c
@@ -952,7 +952,6 @@ void ksz8_flush_dyn_mac_table(struct ksz_device *dev, int port)
 {
 	u8 learn[DSA_MAX_PORTS];
 	int first, index, cnt;
-	struct ksz_port *p;
 	const u16 *regs;
 
 	regs = dev->info->regs;
@@ -966,9 +965,6 @@ void ksz8_flush_dyn_mac_table(struct ksz_device *dev, int port)
 		cnt = dev->info->port_cnt;
 	}
 	for (index = first; index < cnt; index++) {
-		p = &dev->ports[index];
-		if (!p->on)
-			continue;
 		ksz_pread8(dev, index, regs[P_STP_CTRL], &learn[index]);
 		if (!(learn[index] & PORT_LEARN_DISABLE))
 			ksz_pwrite8(dev, index, regs[P_STP_CTRL],
@@ -976,9 +972,6 @@ void ksz8_flush_dyn_mac_table(struct ksz_device *dev, int port)
 	}
 	ksz_cfg(dev, S_FLUSH_TABLE_CTRL, SW_FLUSH_DYN_MAC_TABLE, true);
 	for (index = first; index < cnt; index++) {
-		p = &dev->ports[index];
-		if (!p->on)
-			continue;
 		if (!(learn[index] & PORT_LEARN_DISABLE))
 			ksz_pwrite8(dev, index, regs[P_STP_CTRL], learn[index]);
 	}
@@ -1368,25 +1361,14 @@ void ksz8_config_cpu_port(struct dsa_switch *ds)
 
 	ksz_cfg(dev, regs[S_TAIL_TAG_CTRL], masks[SW_TAIL_TAG_ENABLE], true);
 
-	p = &dev->ports[dev->cpu_port];
-	p->on = 1;
-
 	ksz8_port_setup(dev, dev->cpu_port, true);
 
 	for (i = 0; i < dev->phy_port_cnt; i++) {
-		p = &dev->ports[i];
-
 		ksz_port_stp_state_set(ds, i, BR_STATE_DISABLED);
-
-		/* Last port may be disabled. */
-		if (i == dev->phy_port_cnt)
-			break;
-		p->on = 1;
 	}
 	for (i = 0; i < dev->phy_port_cnt; i++) {
 		p = &dev->ports[i];
-		if (!p->on)
-			continue;
+
 		if (!ksz_is_ksz88x3(dev)) {
 			ksz_pread8(dev, i, regs[P_REMOTE_STATUS], &remote);
 			if (remote & KSZ8_PORT_FIBER_MODE)
diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h
index 055d61ff3fb8..504ad07842a0 100644
--- a/drivers/net/dsa/microchip/ksz_common.h
+++ b/drivers/net/dsa/microchip/ksz_common.h
@@ -87,7 +87,6 @@ struct ksz_port {
 	int stp_state;
 	struct phy_device phydev;
 
-	u32 on:1;			/* port is not disabled by hardware */
 	u32 fiber:1;			/* port is fiber */
 	u32 force:1;
 	u32 read:1;			/* read MIB counters in background */
-- 
2.30.2