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[NET]: Add __dev_getfirstbyhwtype 

Add __dev_getfirstbyhwtype for callers that don't want a reference but
some data from the device and thus need to take the rtnl anyway.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2007-05-03 03:28:13 -07:00 committed by David S. Miller
parent 5b35fad9d4
commit 4e9cac2ba4
2 changed files with 18 additions and 6 deletions
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1
include/linux/netdevice.h
View File

@ -582,6 +582,7 @@ extern int netdev_boot_setup_check(struct net_device *dev);
extern unsigned long netdev_boot_base(const char *prefix, int unit);
extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
extern struct net_device *__dev_getfirstbyhwtype(unsigned short type);
extern void dev_add_pack(struct packet_type *pt);
extern void dev_remove_pack(struct packet_type *pt);
extern void __dev_remove_pack(struct packet_type *pt);

23
net/core/dev.c
View File

@ -576,17 +576,28 @@ struct net_device *dev_getbyhwaddr(unsigned short type, char *ha)
EXPORT_SYMBOL(dev_getbyhwaddr);
struct net_device *__dev_getfirstbyhwtype(unsigned short type)
{
struct net_device *dev;
ASSERT_RTNL();
for (dev = dev_base; dev; dev = dev->next) {
if (dev->type == type)
break;
}
return dev;
}
EXPORT_SYMBOL(__dev_getfirstbyhwtype);
struct net_device *dev_getfirstbyhwtype(unsigned short type)
{
struct net_device *dev;
rtnl_lock();
for (dev = dev_base; dev; dev = dev->next) {
if (dev->type == type) {
dev_hold(dev);
break;
}
}
dev = __dev_getfirstbyhwtype(type);
if (dev)
dev_hold(dev);
rtnl_unlock();
return dev;
}