[PATCH RFC net-next 2/3] net: dsa: add port_setup/port_teardown methods to DSA ops

[Marek Behún]

Add two new methods into the DSA operations structure:
  - port_setup(), called from dsa_port_setup() after the DSA port
    already registered
  - port_teardown(), called from dsa_port_teardown() before the port is
    unregistered

Signed-off-by: Marek Behún <marek.be...@nic.cz>
Cc: Andrew Lunn <and...@lunn.ch>
Cc: Florian Fainelli <f.faine...@gmail.com>
Cc: Vladimir Oltean <olte...@gmail.com>
Cc: Vivien Didelot <vivien.dide...@gmail.com>
---
 include/net/dsa.h |  2 ++
 net/dsa/dsa2.c    | 10 +++++++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/include/net/dsa.h b/include/net/dsa.h
index 147b757ef8ea..848898e5d7c5 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -360,6 +360,8 @@ struct dsa_switch_ops {
 
        int     (*setup)(struct dsa_switch *ds);
        void    (*teardown)(struct dsa_switch *ds);
+       int     (*port_setup)(struct dsa_switch *ds, int port);
+       void    (*port_teardown)(struct dsa_switch *ds, int port);
        u32     (*get_phy_flags)(struct dsa_switch *ds, int port);
 
        /*
diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index 3abd173ebacb..c891300a6d2c 100644
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -315,6 +315,9 @@ static int dsa_port_setup(struct dsa_port *dp)
                break;
        }
 
+       if (!err && ds->ops->port_setup)
+               err = ds->ops->port_setup(ds, dp->index);
+
        if (err)
                devlink_port_unregister(&dp->devlink_port);
 
@@ -323,8 +326,13 @@ static int dsa_port_setup(struct dsa_port *dp)
 
 static void dsa_port_teardown(struct dsa_port *dp)
 {
-       if (dp->type != DSA_PORT_TYPE_UNUSED)
+       struct dsa_switch *ds = dp->ds;
+
+       if (dp->type != DSA_PORT_TYPE_UNUSED) {
                devlink_port_unregister(&dp->devlink_port);
+               if (ds->ops->port_teardown)
+                       ds->ops->port_teardown(ds, dp->index);
+       }
 
        switch (dp->type) {
        case DSA_PORT_TYPE_UNUSED:
-- 
2.21.0