net: dsa: complete dsa_switch_destroy

When unbinding dsa, complete the dsa_switch_destroy to unregister the
fixed link phy then cleanly unregister and destroy the net devices.

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index 14fac4e..6155923 100644 (file)
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -22,6 +22,7 @@
 #include <linux/of_platform.h>
 #include <linux/of_net.h>
 #include <linux/sysfs.h>
+#include <linux/phy_fixed.h>
 #include "dsa_priv.h"
 
 char dsa_driver_version[] = "0.1";
@@ -420,10 +421,46 @@ dsa_switch_setup(struct dsa_switch_tree *dst, int index,
 
 static void dsa_switch_destroy(struct dsa_switch *ds)
 {
+       struct device_node *port_dn;
+       struct phy_device *phydev;
+       struct dsa_chip_data *cd = ds->pd;
+       int port;
+
 #ifdef CONFIG_NET_DSA_HWMON
        if (ds->hwmon_dev)
                hwmon_device_unregister(ds->hwmon_dev);
 #endif
+
+       /* Disable configuration of the CPU and DSA ports */
+       for (port = 0; port < DSA_MAX_PORTS; port++) {
+               if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)))
+                       continue;
+
+               port_dn = cd->port_dn[port];
+               if (of_phy_is_fixed_link(port_dn)) {
+                       phydev = of_phy_find_device(port_dn);
+                       if (phydev) {
+                               int addr = phydev->addr;
+
+                               phy_device_free(phydev);
+                               of_node_put(port_dn);
+                               fixed_phy_del(addr);
+                       }
+               }
+       }
+
+       /* Destroy network devices for physical switch ports. */
+       for (port = 0; port < DSA_MAX_PORTS; port++) {
+               if (!(ds->phys_port_mask & (1 << port)))
+                       continue;
+
+               if (!ds->ports[port])
+                       continue;
+
+               unregister_netdev(ds->ports[port]);
+               free_netdev(ds->ports[port]);
+       }
+
        mdiobus_unregister(ds->slave_mii_bus);
        mdiobus_free(ds->slave_mii_bus);
 }