net: dsa: Export suspend/resume functions

In preparation for allowing switch drivers to implement system-wide
suspend/resume functions, export dsa_switch_suspend and
dsa_switch_resume() such that these are callable from the appropriate
driver specific suspend/resume functions.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/dsa.h

@@ -386,4 +386,18 @@ static inline bool dsa_uses_tagged_protocol(struct dsa_switch_tree *dst)
 
 void dsa_unregister_switch(struct dsa_switch *ds);
 int dsa_register_switch(struct dsa_switch *ds, struct device_node *np);
+#ifdef CONFIG_PM_SLEEP
+int dsa_switch_suspend(struct dsa_switch *ds);
+int dsa_switch_resume(struct dsa_switch *ds);
+#else
+static inline int dsa_switch_suspend(struct dsa_switch *ds)
+{
+	return 0;
+}
+static inline int dsa_switch_resume(struct dsa_switch *ds)
+{
+	return 0;
+}
+#endif /* CONFIG_PM_SLEEP */
+
 #endif

net/dsa/dsa.c

@@ -543,7 +543,7 @@ static void dsa_switch_destroy(struct dsa_switch *ds)
 }
 
 #ifdef CONFIG_PM_SLEEP
-static int dsa_switch_suspend(struct dsa_switch *ds)
+int dsa_switch_suspend(struct dsa_switch *ds)
 {
 	int i, ret = 0;
 
@@ -562,8 +562,9 @@ static int dsa_switch_suspend(struct dsa_switch *ds)
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(dsa_switch_suspend);
 
-static int dsa_switch_resume(struct dsa_switch *ds)
+int dsa_switch_resume(struct dsa_switch *ds)
 {
 	int i, ret = 0;
 
@@ -585,6 +586,7 @@ static int dsa_switch_resume(struct dsa_switch *ds)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(dsa_switch_resume);
 #endif
 
 /* platform driver init and cleanup *****************************************/