dsa: Rename dsa_resolve_tag_protocol() to _get ready for locking

dsa_resolve_tag_protocol() is used to find the tagging driver needed
by a switch driver. When the tagging drivers become modules, it will
be necassary to take a reference on the module to prevent it being
unloaded. So rename this function to _get() to indicate it has some
locking properties.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/dsa/dsa.c

@@ -123,7 +123,7 @@ const char *dsa_tag_protocol_to_str(const struct dsa_device_ops *ops)
 	return ops->name;
 };
 
-const struct dsa_device_ops *dsa_resolve_tag_protocol(int tag_protocol)
+const struct dsa_device_ops *dsa_tag_driver_get(int tag_protocol)
 {
 	const struct dsa_device_ops *ops;
 

net/dsa/dsa2.c

@@ -577,7 +577,7 @@ static int dsa_port_parse_cpu(struct dsa_port *dp, struct net_device *master)
 	enum dsa_tag_protocol tag_protocol;
 
 	tag_protocol = ds->ops->get_tag_protocol(ds, dp->index);
-	tag_ops = dsa_resolve_tag_protocol(tag_protocol);
+	tag_ops = dsa_tag_driver_get(tag_protocol);
 	if (IS_ERR(tag_ops)) {
 		dev_warn(ds->dev, "No tagger for this switch\n");
 		return PTR_ERR(tag_ops);

net/dsa/dsa_priv.h

@@ -84,7 +84,8 @@ struct dsa_slave_priv {
 };
 
 /* dsa.c */
-const struct dsa_device_ops *dsa_resolve_tag_protocol(int tag_protocol);
+const struct dsa_device_ops *dsa_tag_driver_get(int tag_protocol);
+
 bool dsa_schedule_work(struct work_struct *work);
 const char *dsa_tag_protocol_to_str(const struct dsa_device_ops *ops);
 

net/dsa/legacy.c

@@ -152,7 +152,7 @@ static int dsa_switch_setup_one(struct dsa_switch *ds,
 		enum dsa_tag_protocol tag_protocol;
 
 		tag_protocol = ops->get_tag_protocol(ds, dst->cpu_dp->index);
-		tag_ops = dsa_resolve_tag_protocol(tag_protocol);
+		tag_ops = dsa_tag_driver_get(tag_protocol);
 		if (IS_ERR(tag_ops))
 			return PTR_ERR(tag_ops);