net: dsa: use ports list to find slave

Use the new ports list instead of iterating over switches and their
ports when looking for a slave device from a given master interface.

Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>

diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h
index 12f8c7e..53e7577 100644 (file)
--- a/net/dsa/dsa_priv.h
+++ b/net/dsa/dsa_priv.h
@@ -104,25 +104,14 @@ static inline struct net_device *dsa_master_find_slave(struct net_device *dev,
 {
        struct dsa_port *cpu_dp = dev->dsa_ptr;
        struct dsa_switch_tree *dst = cpu_dp->dst;
-       struct dsa_switch *ds;
-       struct dsa_port *slave_port;
+       struct dsa_port *dp;
 
-       if (device < 0 || device >= DSA_MAX_SWITCHES)
-               return NULL;
+       list_for_each_entry(dp, &dst->ports, list)
+               if (dp->ds->index == device && dp->index == port &&
+                   dp->type == DSA_PORT_TYPE_USER)
+                       return dp->slave;
 
-       ds = dst->ds[device];
-       if (!ds)
-               return NULL;
-
-       if (port < 0 || port >= ds->num_ports)
-               return NULL;
-
-       slave_port = &ds->ports[port];
-
-       if (unlikely(slave_port->type != DSA_PORT_TYPE_USER))
-               return NULL;
-
-       return slave_port->slave;
+       return NULL;
 }
 
 /* port.c */