From 98a3b52380b7c2632c60c54d86d5c562f5eabfe4 Mon Sep 17 00:00:00 2001 From: Jan Hoffmann Date: Sun, 7 May 2023 01:05:34 +0200 Subject: [PATCH] realtek: remove store_mcgroups/load_mcgroups The current implementation only works when store and load are called for the same port without any other calls in between. This is because the store function only saves a single port number instead of a portmask for each group. It also doesn't take into account that the allocation of multicast group entries might change between store/load calls. As a result, the multicast port mask table gets corrupted. This also includes the reserved entry for unknown multicast, which gets corrupted even when no other mdb entries have been added. Remove the code for storing/loading multicast groups entirely, as the original commit message doesn't offer a convincing reason why this would be necessary in the first place. Fixes: 724e4af530cd ("realtek: Store and Restore MC memberships for port enable/disable") Signed-off-by: Jan Hoffmann --- .../files-5.10/drivers/net/dsa/rtl83xx/dsa.c | 30 ------------------- .../drivers/net/dsa/rtl83xx/rtl838x.h | 1 - .../files-5.15/drivers/net/dsa/rtl83xx/dsa.c | 26 ---------------- .../drivers/net/dsa/rtl83xx/rtl838x.h | 1 - 4 files changed, 58 deletions(-) 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 270ec172e3..6e615be0e5 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 @@ -1032,31 +1032,6 @@ static u64 rtl83xx_mc_group_del_port(struct rtl838x_switch_priv *priv, int mc_gr return portmask; } -static void store_mcgroups(struct rtl838x_switch_priv *priv, int port) -{ - int mc_group; - - for (mc_group = 0; mc_group < MAX_MC_GROUPS; mc_group++) { - u64 portmask = priv->r->read_mcast_pmask(mc_group); - if (portmask & BIT_ULL(port)) { - priv->mc_group_saves[mc_group] = port; - rtl83xx_mc_group_del_port(priv, mc_group, port); - } - } -} - -static void load_mcgroups(struct rtl838x_switch_priv *priv, int port) -{ - int mc_group; - - for (mc_group = 0; mc_group < MAX_MC_GROUPS; mc_group++) { - if (priv->mc_group_saves[mc_group] == port) { - rtl83xx_mc_group_add_port(priv, mc_group, port); - priv->mc_group_saves[mc_group] = -1; - } - } -} - static int rtl83xx_port_enable(struct dsa_switch *ds, int port, struct phy_device *phydev) { @@ -1075,8 +1050,6 @@ static int rtl83xx_port_enable(struct dsa_switch *ds, int port, /* add port to switch mask of CPU_PORT */ priv->r->traffic_enable(priv->cpu_port, port); - load_mcgroups(priv, port); - if (priv->is_lagmember[port]) { pr_debug("%s: %d is lag slave. ignore\n", __func__, port); return 0; @@ -1112,7 +1085,6 @@ static void rtl83xx_port_disable(struct dsa_switch *ds, int port) // BUG: This does not work on RTL931X /* remove port from switch mask of CPU_PORT */ priv->r->traffic_disable(priv->cpu_port, port); - store_mcgroups(priv, port); /* remove all other ports in the same bridge from switch mask of port */ v = priv->r->traffic_get(port); @@ -1212,7 +1184,6 @@ static int rtl83xx_port_bridge_join(struct dsa_switch *ds, int port, port_bitmap |= BIT_ULL(i); } } - load_mcgroups(priv, port); /* Add all other ports to this port matrix. */ if (priv->ports[port].enable) { @@ -1257,7 +1228,6 @@ static void rtl83xx_port_bridge_leave(struct dsa_switch *ds, int port, port_bitmap |= BIT_ULL(i); } } - store_mcgroups(priv, port); /* Remove all other ports from this port matrix. */ if (priv->ports[port].enable) { diff --git a/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl838x.h b/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl838x.h index 3f1f1d49f8..81656799a7 100644 --- a/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl838x.h +++ b/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl838x.h @@ -1086,7 +1086,6 @@ struct rtl838x_switch_priv { struct notifier_block fib_nb; bool eee_enabled; unsigned long int mc_group_bm[MAX_MC_GROUPS >> 5]; - int mc_group_saves[MAX_MC_GROUPS]; int n_pie_blocks; struct rhashtable tc_ht; unsigned long int pie_use_bm[MAX_PIE_ENTRIES >> 5]; 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 b4cb39ed5d..df78aa3737 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 @@ -1019,27 +1019,6 @@ static u64 rtl83xx_mc_group_del_port(struct rtl838x_switch_priv *priv, int mc_gr return portmask; } -static void store_mcgroups(struct rtl838x_switch_priv *priv, int port) -{ - for (int mc_group = 0; mc_group < MAX_MC_GROUPS; mc_group++) { - u64 portmask = priv->r->read_mcast_pmask(mc_group); - if (portmask & BIT_ULL(port)) { - priv->mc_group_saves[mc_group] = port; - rtl83xx_mc_group_del_port(priv, mc_group, port); - } - } -} - -static void load_mcgroups(struct rtl838x_switch_priv *priv, int port) -{ - for (int mc_group = 0; mc_group < MAX_MC_GROUPS; mc_group++) { - if (priv->mc_group_saves[mc_group] == port) { - rtl83xx_mc_group_add_port(priv, mc_group, port); - priv->mc_group_saves[mc_group] = -1; - } - } -} - static int rtl83xx_port_enable(struct dsa_switch *ds, int port, struct phy_device *phydev) { @@ -1058,8 +1037,6 @@ static int rtl83xx_port_enable(struct dsa_switch *ds, int port, /* add port to switch mask of CPU_PORT */ priv->r->traffic_enable(priv->cpu_port, port); - load_mcgroups(priv, port); - if (priv->is_lagmember[port]) { pr_debug("%s: %d is lag slave. ignore\n", __func__, port); return 0; @@ -1095,7 +1072,6 @@ static void rtl83xx_port_disable(struct dsa_switch *ds, int port) /* BUG: This does not work on RTL931X */ /* remove port from switch mask of CPU_PORT */ priv->r->traffic_disable(priv->cpu_port, port); - store_mcgroups(priv, port); /* remove all other ports in the same bridge from switch mask of port */ v = priv->r->traffic_get(port); @@ -1197,7 +1173,6 @@ static int rtl83xx_port_bridge_join(struct dsa_switch *ds, int port, port_bitmap |= BIT_ULL(i); } } - load_mcgroups(priv, port); /* Add all other ports to this port matrix. */ if (priv->ports[port].enable) { @@ -1241,7 +1216,6 @@ static void rtl83xx_port_bridge_leave(struct dsa_switch *ds, int port, port_bitmap |= BIT_ULL(i); } } - store_mcgroups(priv, port); /* Remove all other ports from this port matrix. */ if (priv->ports[port].enable) { diff --git a/target/linux/realtek/files-5.15/drivers/net/dsa/rtl83xx/rtl838x.h b/target/linux/realtek/files-5.15/drivers/net/dsa/rtl83xx/rtl838x.h index bfab576e06..24d18d61fa 100644 --- a/target/linux/realtek/files-5.15/drivers/net/dsa/rtl83xx/rtl838x.h +++ b/target/linux/realtek/files-5.15/drivers/net/dsa/rtl83xx/rtl838x.h @@ -1082,7 +1082,6 @@ struct rtl838x_switch_priv { struct notifier_block fib_nb; bool eee_enabled; unsigned long int mc_group_bm[MAX_MC_GROUPS >> 5]; - int mc_group_saves[MAX_MC_GROUPS]; int n_pie_blocks; struct rhashtable tc_ht; unsigned long int pie_use_bm[MAX_PIE_ENTRIES >> 5]; -- 2.30.2