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path: root/drivers/net/wan/hdlc_generic.c
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Diffstat (limited to 'drivers/net/wan/hdlc_generic.c')
-rw-r--r--drivers/net/wan/hdlc_generic.c65
1 files changed, 35 insertions, 30 deletions
diff --git a/drivers/net/wan/hdlc_generic.c b/drivers/net/wan/hdlc_generic.c
index b7da55140fb..04ca1f7b642 100644
--- a/drivers/net/wan/hdlc_generic.c
+++ b/drivers/net/wan/hdlc_generic.c
@@ -34,10 +34,11 @@
#include <linux/inetdevice.h>
#include <linux/lapb.h>
#include <linux/rtnetlink.h>
+#include <linux/notifier.h>
#include <linux/hdlc.h>
-static const char* version = "HDLC support module revision 1.18";
+static const char* version = "HDLC support module revision 1.19";
#undef DEBUG_LINK
@@ -73,57 +74,51 @@ static int hdlc_rcv(struct sk_buff *skb, struct net_device *dev,
-static void __hdlc_set_carrier_on(struct net_device *dev)
+static inline void hdlc_proto_start(struct net_device *dev)
{
hdlc_device *hdlc = dev_to_hdlc(dev);
if (hdlc->proto.start)
return hdlc->proto.start(dev);
-#if 0
-#ifdef DEBUG_LINK
- if (netif_carrier_ok(dev))
- printk(KERN_ERR "hdlc_set_carrier_on(): already on\n");
-#endif
- netif_carrier_on(dev);
-#endif
}
-static void __hdlc_set_carrier_off(struct net_device *dev)
+static inline void hdlc_proto_stop(struct net_device *dev)
{
hdlc_device *hdlc = dev_to_hdlc(dev);
if (hdlc->proto.stop)
return hdlc->proto.stop(dev);
-
-#if 0
-#ifdef DEBUG_LINK
- if (!netif_carrier_ok(dev))
- printk(KERN_ERR "hdlc_set_carrier_off(): already off\n");
-#endif
- netif_carrier_off(dev);
-#endif
}
-void hdlc_set_carrier(int on, struct net_device *dev)
+static int hdlc_device_event(struct notifier_block *this, unsigned long event,
+ void *ptr)
{
- hdlc_device *hdlc = dev_to_hdlc(dev);
+ struct net_device *dev = ptr;
+ hdlc_device *hdlc;
unsigned long flags;
- on = on ? 1 : 0;
+ int on;
+
+ if (dev->get_stats != hdlc_get_stats)
+ return NOTIFY_DONE; /* not an HDLC device */
+
+ if (event != NETDEV_CHANGE)
+ return NOTIFY_DONE; /* Only interrested in carrier changes */
+
+ on = netif_carrier_ok(dev);
#ifdef DEBUG_LINK
- printk(KERN_DEBUG "hdlc_set_carrier %i\n", on);
+ printk(KERN_DEBUG "%s: hdlc_device_event NETDEV_CHANGE, carrier %i\n",
+ dev->name, on);
#endif
+ hdlc = dev_to_hdlc(dev);
spin_lock_irqsave(&hdlc->state_lock, flags);
if (hdlc->carrier == on)
goto carrier_exit; /* no change in DCD line level */
-#ifdef DEBUG_LINK
- printk(KERN_INFO "%s: carrier %s\n", dev->name, on ? "ON" : "off");
-#endif
hdlc->carrier = on;
if (!hdlc->open)
@@ -131,14 +126,15 @@ void hdlc_set_carrier(int on, struct net_device *dev)
if (hdlc->carrier) {
printk(KERN_INFO "%s: Carrier detected\n", dev->name);
- __hdlc_set_carrier_on(dev);
+ hdlc_proto_start(dev);
} else {
printk(KERN_INFO "%s: Carrier lost\n", dev->name);
- __hdlc_set_carrier_off(dev);
+ hdlc_proto_stop(dev);
}
carrier_exit:
spin_unlock_irqrestore(&hdlc->state_lock, flags);
+ return NOTIFY_DONE;
}
@@ -165,7 +161,7 @@ int hdlc_open(struct net_device *dev)
if (hdlc->carrier) {
printk(KERN_INFO "%s: Carrier detected\n", dev->name);
- __hdlc_set_carrier_on(dev);
+ hdlc_proto_start(dev);
} else
printk(KERN_INFO "%s: No carrier\n", dev->name);
@@ -190,7 +186,7 @@ void hdlc_close(struct net_device *dev)
hdlc->open = 0;
if (hdlc->carrier)
- __hdlc_set_carrier_off(dev);
+ hdlc_proto_stop(dev);
spin_unlock_irq(&hdlc->state_lock);
@@ -303,7 +299,6 @@ MODULE_LICENSE("GPL v2");
EXPORT_SYMBOL(hdlc_open);
EXPORT_SYMBOL(hdlc_close);
-EXPORT_SYMBOL(hdlc_set_carrier);
EXPORT_SYMBOL(hdlc_ioctl);
EXPORT_SYMBOL(hdlc_setup);
EXPORT_SYMBOL(alloc_hdlcdev);
@@ -315,9 +310,18 @@ static struct packet_type hdlc_packet_type = {
};
+static struct notifier_block hdlc_notifier = {
+ .notifier_call = hdlc_device_event,
+};
+
+
static int __init hdlc_module_init(void)
{
+ int result;
+
printk(KERN_INFO "%s\n", version);
+ if ((result = register_netdevice_notifier(&hdlc_notifier)) != 0)
+ return result;
dev_add_pack(&hdlc_packet_type);
return 0;
}
@@ -327,6 +331,7 @@ static int __init hdlc_module_init(void)
static void __exit hdlc_module_exit(void)
{
dev_remove_pack(&hdlc_packet_type);
+ unregister_netdevice_notifier(&hdlc_notifier);
}