From: Jan Hoffmann <jan@3e8.eu>
Date: Sat, 6 May 2023 17:28:52 +0000 (+0200)
Subject: realtek: properly update port masks when port leaves bridge
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=3af984e46e37d5fa2e700143d85a199c85653872;p=openwrt%2Fstaging%2Fnbd.git

realtek: properly update port masks when port leaves bridge

Correctly update the isolation mask of the port being configured. The
port_bitmap variable should contain all other bridge members and needs
to be actually removed from the isolation mask instead of added to it.

Also actually remove the port being configured from the pm field of the
other ports, so that any other ports that are currently disabled will be
configured correctly when they are enabled.

Fixes: df8e6be59a1f ("rtl838x: add new architecture")
[fixed updating pm field of other ports]
Fixes: 2b88563ee5aa ("realtek: update the tree to the latest refactored version")
[reintroduced incorrect pm field update]
Fixes: 27029277f98d ("realtek: add switch driver support for the RTL93XX based switches")
Signed-off-by: Jan Hoffmann <jan@3e8.eu>
---

diff --git a/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/dsa.c b/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/dsa.c
index 63461ff573..220f1d5d28 100644
--- a/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/dsa.c
+++ b/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/dsa.c
@@ -1227,7 +1227,7 @@ static void rtl83xx_port_bridge_leave(struct dsa_switch *ds, int port,
 					struct net_device *bridge)
 {
 	struct rtl838x_switch_priv *priv = ds->priv;
-	u64 port_bitmap = BIT_ULL(priv->cpu_port), v;
+	u64 port_bitmap = 0, v;
 	int i;
 
 	pr_debug("%s %x: %d", __func__, (u32)priv, port);
@@ -1245,16 +1245,16 @@ static void rtl83xx_port_bridge_leave(struct dsa_switch *ds, int port,
 			if (priv->ports[i].enable)
 				priv->r->traffic_disable(i, port);
 
-			priv->ports[i].pm |= BIT_ULL(port);
-			port_bitmap &= ~BIT_ULL(i);
+			priv->ports[i].pm &= ~BIT_ULL(port);
+			port_bitmap |= BIT_ULL(i);
 		}
 	}
 	store_mcgroups(priv, port);
 
-	/* Add all other ports to this port matrix. */
+	/* Remove all other ports from this port matrix. */
 	if (priv->ports[port].enable) {
 		v = priv->r->traffic_get(port);
-		v |= port_bitmap;
+		v &= ~port_bitmap;
 		priv->r->traffic_set(port, v);
 	}
 	priv->ports[port].pm &= ~port_bitmap;
diff --git a/target/linux/realtek/files-5.15/drivers/net/dsa/rtl83xx/dsa.c b/target/linux/realtek/files-5.15/drivers/net/dsa/rtl83xx/dsa.c
index 83a0441ce2..7eebb2107f 100644
--- a/target/linux/realtek/files-5.15/drivers/net/dsa/rtl83xx/dsa.c
+++ b/target/linux/realtek/files-5.15/drivers/net/dsa/rtl83xx/dsa.c
@@ -1212,7 +1212,7 @@ static void rtl83xx_port_bridge_leave(struct dsa_switch *ds, int port,
 					struct net_device *bridge)
 {
 	struct rtl838x_switch_priv *priv = ds->priv;
-	u64 port_bitmap = BIT_ULL(priv->cpu_port), v;
+	u64 port_bitmap = 0, v;
 
 	pr_debug("%s %x: %d", __func__, (u32)priv, port);
 	mutex_lock(&priv->reg_mutex);
@@ -1229,16 +1229,16 @@ static void rtl83xx_port_bridge_leave(struct dsa_switch *ds, int port,
 			if (priv->ports[i].enable)
 				priv->r->traffic_disable(i, port);
 
-			priv->ports[i].pm |= BIT_ULL(port);
-			port_bitmap &= ~BIT_ULL(i);
+			priv->ports[i].pm &= ~BIT_ULL(port);
+			port_bitmap |= BIT_ULL(i);
 		}
 	}
 	store_mcgroups(priv, port);
 
-	/* Add all other ports to this port matrix. */
+	/* Remove all other ports from this port matrix. */
 	if (priv->ports[port].enable) {
 		v = priv->r->traffic_get(port);
-		v |= port_bitmap;
+		v &= ~port_bitmap;
 		priv->r->traffic_set(port, v);
 	}
 	priv->ports[port].pm &= ~port_bitmap;