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authorVladimir Oltean <vladimir.oltean@nxp.com>2020-05-10 19:37:42 +0300
committerJakub Kicinski <kuba@kernel.org>2020-05-11 05:52:33 +0300
commit3b7bc1f09101ccace330d105c13c2946bf3be6d5 (patch)
tree8a6adf3d5acc84c8ed1530f3b8579e03dd7972c6 /net/dsa
parentf66a6a69f97a24546664541237a82b288c2713f6 (diff)
downloadlinux-3b7bc1f09101ccace330d105c13c2946bf3be6d5.tar.xz
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 <vladimir.oltean@nxp.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/dsa')
-rw-r--r--net/dsa/dsa2.c21
1 files changed, 21 insertions, 0 deletions
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;