dsa: Keep link list of tag drivers

Let the tag drivers register themselves with the DSA core, keeping
them in a linked list.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
v2

Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index 34becafbd37b17effaa468daef3734496b4ed903..32778df1be27e59d27e7f8df2553f8b45c55b65d 100644 (file)
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -27,6 +27,9 @@
 
 #include "dsa_priv.h"
 
+static LIST_HEAD(dsa_tag_drivers_list);
+static DEFINE_MUTEX(dsa_tag_drivers_lock);
+
 static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
                                            struct net_device *dev)
 {
@@ -76,15 +79,40 @@ const struct dsa_device_ops *dsa_device_ops[DSA_TAG_LAST] = {
        [DSA_TAG_PROTO_NONE] = &none_ops,
 };
 
+static void dsa_tag_driver_register(struct dsa_tag_driver *dsa_tag_driver,
+                                   struct module *owner)
+{
+       dsa_tag_driver->owner = owner;
+
+       mutex_lock(&dsa_tag_drivers_lock);
+       list_add_tail(&dsa_tag_driver->list, &dsa_tag_drivers_list);
+       mutex_unlock(&dsa_tag_drivers_lock);
+}
+
 void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[],
                              unsigned int count, struct module *owner)
 {
+       unsigned int i;
+
+       for (i = 0; i < count; i++)
+               dsa_tag_driver_register(dsa_tag_driver_array[i], owner);
+}
+
+static void dsa_tag_driver_unregister(struct dsa_tag_driver *dsa_tag_driver)
+{
+       mutex_lock(&dsa_tag_drivers_lock);
+       list_del(&dsa_tag_driver->list);
+       mutex_unlock(&dsa_tag_drivers_lock);
 }
 EXPORT_SYMBOL_GPL(dsa_tag_drivers_register);
 
 void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[],
                                unsigned int count)
 {
+       unsigned int i;
+
+       for (i = 0; i < count; i++)
+               dsa_tag_driver_unregister(dsa_tag_driver_array[i]);
 }
 EXPORT_SYMBOL_GPL(dsa_tag_drivers_unregister);