Re: [PATCH net-next v3 07/10] net: Relocate dev_to_net_device() into core

dev_to_net_device() is moved from net/dsa/dsa.c to net/core/dev.c since
it going to be used by net/dsa/dsa2.c and the namespace of the function
justifies making it available to other users potentially.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 include/linux/netdevice.h |  2 ++
 net/core/dev.c            | 19 +++++++++++++++++++
 net/dsa/dsa.c             | 18 ------------------
 3 files changed, 21 insertions(+), 18 deletions(-)

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 97ae0ac513ee..6d021c37b774 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h

@@ -4390,4 +4390,6 @@ do {								\
 #define PTYPE_HASH_SIZE	(16)
 #define PTYPE_HASH_MASK	(PTYPE_HASH_SIZE - 1)
 
+struct net_device *dev_to_net_device(struct device *dev);
+
 #endif	/* _LINUX_NETDEVICE_H */

diff --git a/net/core/dev.c b/net/core/dev.c
index ad5959e56116..7547e2ccc06b 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c

@@ -8128,6 +8128,25 @@ const char *netdev_drivername(const struct net_device *dev)
 	return empty;
 }
 
+struct net_device *dev_to_net_device(struct device *dev)
+{
+	struct device *d;
+
+	d = device_find_class(dev, "net");
+	if (d) {
+		struct net_device *nd;
+
+		nd = to_net_dev(d);
+		dev_hold(nd);
+		put_device(d);
+
+		return nd;
+	}
+
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(dev_to_net_device);