[PATCH] ax25 use dev_hold/dev_put as required for net_devices.

[Stephen Hemminger <shemminger@xxxxxxxx>]

Ax25 holds a reference to the net device below, in the ax25_dev structure;
therefore it needs to use dev_hold/dev_put.

This is against 2.6.0-test3 with your earlier patch

diff -Nru a/net/ax25/ax25_dev.c b/net/ax25/ax25_dev.c
--- a/net/ax25/ax25_dev.c       Tue Aug 12 16:45:51 2003
+++ b/net/ax25/ax25_dev.c       Tue Aug 12 16:45:51 2003
@@ -67,6 +67,7 @@
 
        dev->ax25_ptr     = ax25_dev;
        ax25_dev->dev     = dev;
+       dev_hold(dev);
        ax25_dev->forward = NULL;
 
        ax25_dev->values[AX25_VALUES_IPDEFMODE] = AX25_DEF_IPDEFMODE;
@@ -121,6 +122,7 @@
        if ((s = ax25_dev_list) == ax25_dev) {
                ax25_dev_list = s->next;
                spin_unlock_bh(&ax25_dev_lock);
+               dev_put(dev);
                kfree(ax25_dev);
                ax25_register_sysctl();
                return;
@@ -131,6 +133,7 @@
                        s->next = ax25_dev->next;
                        spin_unlock_bh(&ax25_dev_lock);
                        kfree(ax25_dev);
+                       dev_put(dev);
                        ax25_register_sysctl();
                        return;
                }