greybus: svc: add stub connection-quiescing operation

Add stubbed out connection-quiescing operation that is needed for proper
connection tear down.

Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/svc.c

@@ -438,6 +438,16 @@ int gb_svc_connection_create(struct gb_svc *svc,
 }
 EXPORT_SYMBOL_GPL(gb_svc_connection_create);
 
+void gb_svc_connection_quiescing(struct gb_svc *svc, u8 intf1_id, u16 cport1_id,
+					u8 intf2_id, u16 cport2_id)
+{
+	/* FIXME: implement */
+
+	dev_dbg(&svc->dev, "%s - (%u:%u %u:%u)\n", __func__,
+				intf1_id, cport1_id, intf2_id, cport2_id);
+}
+EXPORT_SYMBOL_GPL(gb_svc_connection_quiescing);
+
 void gb_svc_connection_destroy(struct gb_svc *svc, u8 intf1_id, u16 cport1_id,
 			       u8 intf2_id, u16 cport2_id)
 {

drivers/staging/greybus/svc.h

@@ -64,6 +64,8 @@ int gb_svc_route_create(struct gb_svc *svc, u8 intf1_id, u8 dev1_id,
 void gb_svc_route_destroy(struct gb_svc *svc, u8 intf1_id, u8 intf2_id);
 int gb_svc_connection_create(struct gb_svc *svc, u8 intf1_id, u16 cport1_id,
 			     u8 intf2_id, u16 cport2_id, u8 cport_flags);
+void gb_svc_connection_quiescing(struct gb_svc *svc, u8 intf1_id, u16 cport1_id,
+					u8 intf2_id, u16 cport2_id);
 void gb_svc_connection_destroy(struct gb_svc *svc, u8 intf1_id, u16 cport1_id,
 			       u8 intf2_id, u16 cport2_id);
 int gb_svc_intf_eject(struct gb_svc *svc, u8 intf_id);