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 <[email protected]>
Signed-off-by: David Howells <[email protected]>
---
include/linux/netdevice.h | 1 +
net/core/dev.c | 21 ++++++++++++++++-----
2 files changed, 17 insertions(+), 5 deletions(-)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index ac0c92b..4428f1c 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -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);
diff --git a/net/core/dev.c b/net/core/dev.c
index eb99900..c305819 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -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_getfirstbyhwtype(unsigned short type)
{
struct net_device *dev;
- rtnl_lock();
+ ASSERT_RTNL();
for (dev = dev_base; dev; dev = dev->next) {
- if (dev->type == type) {
- dev_hold(dev);
+ 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();
+ dev = __dev_getfirstbyhwtype(type);
+ if (dev)
+ dev_hold(dev);
rtnl_unlock();
return dev;
}
-
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