[BRIDGE]: fix module startup error handling

Return address in use, if some other kernel code has the SAP.
Propogate out error codes from netfilter registration and unwind.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/bridge/br.c b/net/bridge/br.c
index 12da21afb9ca636bbd438be992cacfa5722b2524..558d27204f60c32c9ce0a69bdb379dde58e3dc8d 100644 (file)
--- a/net/bridge/br.c
+++ b/net/bridge/br.c
@@ -30,36 +30,44 @@ static struct llc_sap *br_stp_sap;
 
 static int __init br_init(void)
 {
+       int err;
+
        br_stp_sap = llc_sap_open(LLC_SAP_BSPAN, br_stp_rcv);
        if (!br_stp_sap) {
                printk(KERN_ERR "bridge: can't register sap for STP\n");
-               return -EBUSY;
+               return -EADDRINUSE;
        }
 
        br_fdb_init();
 
-#ifdef CONFIG_BRIDGE_NETFILTER
-       if (br_netfilter_init())
-               return 1;
-#endif
+       err = br_netfilter_init();
+       if (err)
+               goto err_out1;
+
+       err = register_netdevice_notifier(&br_device_notifier);
+       if (err)
+               goto err_out2;
+
        brioctl_set(br_ioctl_deviceless_stub);
        br_handle_frame_hook = br_handle_frame;
 
        br_fdb_get_hook = br_fdb_get;
        br_fdb_put_hook = br_fdb_put;
 
-       register_netdevice_notifier(&br_device_notifier);
-
        return 0;
+
+err_out2:
+       br_netfilter_fini();
+err_out1:
+       llc_sap_put(br_stp_sap);
+       return err;
 }
 
 static void __exit br_deinit(void)
 {
        rcu_assign_pointer(br_stp_sap->rcv_func, NULL);
 
-#ifdef CONFIG_BRIDGE_NETFILTER
        br_netfilter_fini();
-#endif
        unregister_netdevice_notifier(&br_device_notifier);
        brioctl_set(NULL);
 

diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 86ecea7ed372f2623e2a2fb732905fe3d9a0118f..22071d156828cca601c069336152861a92397e6c 100644 (file)
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -192,8 +192,13 @@ extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 extern int br_ioctl_deviceless_stub(unsigned int cmd, void __user *arg);
 
 /* br_netfilter.c */
+#ifdef CONFIG_BRIDGE_NETFILTER
 extern int br_netfilter_init(void);
 extern void br_netfilter_fini(void);
+#else
+#define br_netfilter_init()    (0)
+#define br_netfilter_fini()    do { } while(0)
+#endif
 
 /* br_stp.c */
 extern void br_log_state(const struct net_bridge_port *p);