net: dsa: Provide unique DSA slave MII bus names

In case we have multiples trees and switches with the same index, we
need to add another discriminating id: the switch tree.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 15a4922618952b4c0de337e4253642e772d2fffe..a51dfedf0014dbf104de3e8811be5e7989de33a0 100644 (file)
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -49,7 +49,8 @@ void dsa_slave_mii_bus_init(struct dsa_switch *ds)
        ds->slave_mii_bus->name = "dsa slave smi";
        ds->slave_mii_bus->read = dsa_slave_phy_read;
        ds->slave_mii_bus->write = dsa_slave_phy_write;
-       snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d", ds->index);
+       snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d",
+                ds->dst->tree, ds->index);
        ds->slave_mii_bus->parent = ds->dev;
        ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
 }