From 3b7bc1f09101ccace330d105c13c2946bf3be6d5 Mon Sep 17 00:00:00 2001 From: Vladimir Oltean Date: Sun, 10 May 2020 19:37:42 +0300 Subject: [PATCH] net: dsa: introduce a dsa_switch_find function Somewhat similar to dsa_tree_find, dsa_switch_find returns a dsa_switch structure pointer by searching for its tree index and switch index (the parameters from dsa,member). To be used, for example, by drivers who implement .crosschip_bridge_join and need a reference to the other switch indicated to by the tree_index and sw_index arguments. Signed-off-by: Vladimir Oltean Reviewed-by: Florian Fainelli Signed-off-by: Jakub Kicinski --- include/net/dsa.h | 1 + net/dsa/dsa2.c | 21 +++++++++++++++++++++ 2 files changed, 22 insertions(+) diff --git a/include/net/dsa.h b/include/net/dsa.h index 0f4fc00239d9..312c2f067e65 100644 --- a/include/net/dsa.h +++ b/include/net/dsa.h @@ -672,6 +672,7 @@ static inline bool dsa_can_decode(const struct sk_buff *skb, void dsa_unregister_switch(struct dsa_switch *ds); int dsa_register_switch(struct dsa_switch *ds); +struct dsa_switch *dsa_switch_find(int tree_index, int sw_index); #ifdef CONFIG_PM_SLEEP int dsa_switch_suspend(struct dsa_switch *ds); int dsa_switch_resume(struct dsa_switch *ds); diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c index d90665b465b8..076908fdd29b 100644 --- a/net/dsa/dsa2.c +++ b/net/dsa/dsa2.c @@ -24,6 +24,27 @@ LIST_HEAD(dsa_tree_list); static const struct devlink_ops dsa_devlink_ops = { }; +struct dsa_switch *dsa_switch_find(int tree_index, int sw_index) +{ + struct dsa_switch_tree *dst; + struct dsa_port *dp; + + list_for_each_entry(dst, &dsa_tree_list, list) { + if (dst->index != tree_index) + continue; + + list_for_each_entry(dp, &dst->ports, list) { + if (dp->ds->index != sw_index) + continue; + + return dp->ds; + } + } + + return NULL; +} +EXPORT_SYMBOL_GPL(dsa_switch_find); + static struct dsa_switch_tree *dsa_tree_find(int index) { struct dsa_switch_tree *dst;