net: dsa: add switch mdb bitmap functions

This patch brings no functional changes.
It moves out the MDB code iterating on a multicast group into new
dsa_switch_mdb_{prepare,add}_bitmap() functions.

This gives us a better isolation of the two switchdev phases.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/dsa/switch.c b/net/dsa/switch.c
index 17cd03d..9a01514 100644 (file)
--- a/net/dsa/switch.c
+++ b/net/dsa/switch.c
@@ -108,13 +108,42 @@ static int dsa_switch_fdb_del(struct dsa_switch *ds,
                                     info->vid);
 }
 
+static int
+dsa_switch_mdb_prepare_bitmap(struct dsa_switch *ds,
+                             const struct switchdev_obj_port_mdb *mdb,
+                             const unsigned long *bitmap)
+{
+       int port, err;
+
+       if (!ds->ops->port_mdb_prepare || !ds->ops->port_mdb_add)
+               return -EOPNOTSUPP;
+
+       for_each_set_bit(port, bitmap, ds->num_ports) {
+               err = ds->ops->port_mdb_prepare(ds, port, mdb);
+               if (err)
+                       return err;
+       }
+
+       return 0;
+}
+
+static void dsa_switch_mdb_add_bitmap(struct dsa_switch *ds,
+                                     const struct switchdev_obj_port_mdb *mdb,
+                                     const unsigned long *bitmap)
+{
+       int port;
+
+       for_each_set_bit(port, bitmap, ds->num_ports)
+               ds->ops->port_mdb_add(ds, port, mdb);
+}
+
 static int dsa_switch_mdb_add(struct dsa_switch *ds,
                              struct dsa_notifier_mdb_info *info)
 {
        const struct switchdev_obj_port_mdb *mdb = info->mdb;
        struct switchdev_trans *trans = info->trans;
        DECLARE_BITMAP(group, ds->num_ports);
-       int port, err;
+       int port;
 
        /* Build a mask of Multicast group members */
        bitmap_zero(group, ds->num_ports);
@@ -124,21 +153,10 @@ static int dsa_switch_mdb_add(struct dsa_switch *ds,
                if (dsa_is_dsa_port(ds, port))
                        set_bit(port, group);
 
-       if (switchdev_trans_ph_prepare(trans)) {
-               if (!ds->ops->port_mdb_prepare || !ds->ops->port_mdb_add)
-                       return -EOPNOTSUPP;
-
-               for_each_set_bit(port, group, ds->num_ports) {
-                       err = ds->ops->port_mdb_prepare(ds, port, mdb);
-                       if (err)
-                               return err;
-               }
-
-               return 0;
-       }
+       if (switchdev_trans_ph_prepare(trans))
+               return dsa_switch_mdb_prepare_bitmap(ds, mdb, group);
 
-       for_each_set_bit(port, group, ds->num_ports)
-               ds->ops->port_mdb_add(ds, port, mdb);
+       dsa_switch_mdb_add_bitmap(ds, mdb, group);
 
        return 0;
 }