redonkable/remarkable-linux
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[BRIDGE]: fix module startup error handling

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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>
This commit is contained in:
Stephen Hemminger 2006-05-25 15:59:33 -07:00 committed by David S. Miller
parent 9ef513bed6
commit c090971326
2 changed files with 22 additions and 9 deletions
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26
net/bridge/br.c
View file

@ -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);

5
net/bridge/br_private.h
View file

@ -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);