[PATCH 2/3] net: dsa: complete dsa_switch_destroy calls

From: Neil Armstrong
Date: Fri Oct 02 2015 - 06:48:20 EST


When unbinding dsa, complete the dsa_switch_destroy to cleanly
destroy and unregister the net and mdio devices.

Tested-by: Andrew Lunn <andrew@xxxxxxx>
Tested-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
Signed-off-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
---
net/dsa/dsa.c | 42 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)

diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index 98f94c2..0c104af 100644
--- 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 +421,51 @@ 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]);
+ }
+
+ /*
+ * Do basic unregister.
+ */
+ mdiobus_unregister(ds->slave_mii_bus);
}

#ifdef CONFIG_PM_SLEEP
--
1.9.1
--
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