From c090971326db094ed702c1f8f2dbe04b7e3b8f27 Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Thu, 25 May 2006 15:59:33 -0700 Subject: [PATCH] [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 Signed-off-by: David S. Miller --- net/bridge/br.c | 26 +++++++++++++++++--------- net/bridge/br_private.h | 5 +++++ 2 files changed, 22 insertions(+), 9 deletions(-) diff --git a/net/bridge/br.c b/net/bridge/br.c index 12da21afb9ca..558d27204f60 100644 --- 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 86ecea7ed372..22071d156828 100644 --- 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); -- 2.20.1