[PATCH v4 net-next 02/17] net: dsa: Add teardown callback for drivers

[Vladimir Oltean]

This is helpful for e.g. draining per-driver (not per-port) tagger
queues.

Signed-off-by: Vladimir Oltean <olteanv@xxxxxxxxx>
Reviewed-by: Andrew Lunn <andrew@xxxxxxx>
Reviewed-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
---
Changes in v4:

None.

Changes in v3:

Moved after dsa_switch_unregister_notifier, which is symmetrical to
where the setup callback is.

Changes in v2:

Patch is new.

 include/net/dsa.h | 1 +
 net/dsa/dsa2.c    | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/include/net/dsa.h b/include/net/dsa.h
index 1131d9fac20b..82a2baa2dc48 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -357,6 +357,7 @@ struct dsa_switch_ops {
 						  int port);
 
 	int	(*setup)(struct dsa_switch *ds);
+	void	(*teardown)(struct dsa_switch *ds);
 	u32	(*get_phy_flags)(struct dsa_switch *ds, int port);
 
 	/*
diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index 38d11c863b57..3abd173ebacb 100644
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -408,6 +408,9 @@ static void dsa_switch_teardown(struct dsa_switch *ds)
 
 	dsa_switch_unregister_notifier(ds);
 
+	if (ds->ops->teardown)
+		ds->ops->teardown(ds);
+
 	if (ds->devlink) {
 		devlink_unregister(ds->devlink);
 		devlink_free(ds->devlink);
-- 
2.17.1