greybus: interface: move interface-removal helper

Move helper to remove all interfaces of a host-device to the svc code
and call it when removing the svc device as this needs to be coordinated
with flushing the SVC work queue.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Jeffrey Carlyle <jcarlyle@google.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/hd.c

@@ -138,7 +138,6 @@ void gb_hd_del(struct gb_host_device *hd)
 	 * removing the remaining interfaces.
 	 */
 	gb_svc_del(hd->svc);
-	gb_interfaces_remove(hd);
 
 	device_del(&hd->dev);
 }

drivers/staging/greybus/interface.c

@@ -167,14 +167,6 @@ void gb_interface_remove(struct gb_interface *intf)
 	put_device(&intf->dev);
 }
 
-void gb_interfaces_remove(struct gb_host_device *hd)
-{
-	struct gb_interface *intf, *temp;
-
-	list_for_each_entry_safe(intf, temp, &hd->interfaces, links)
-		gb_interface_remove(intf);
-}
-
 /*
  * Intialise an interface by enabling the control connection and fetching the
  * manifest and other information over it.

drivers/staging/greybus/interface.h

@@ -50,6 +50,5 @@ struct gb_interface *gb_interface_create(struct gb_host_device *hd,
 int gb_interface_init(struct gb_interface *intf);
 int gb_interface_add(struct gb_interface *intf);
 void gb_interface_remove(struct gb_interface *intf);
-void gb_interfaces_remove(struct gb_host_device *hd);
 
 #endif /* __INTERFACE_H */

drivers/staging/greybus/svc.c

@@ -997,6 +997,14 @@ int gb_svc_add(struct gb_svc *svc)
 	return 0;
 }
 
+static void gb_svc_remove_interfaces(struct gb_svc *svc)
+{
+	struct gb_interface *intf, *tmp;
+
+	list_for_each_entry_safe(intf, tmp, &svc->hd->interfaces, links)
+		gb_interface_remove(intf);
+}
+
 void gb_svc_del(struct gb_svc *svc)
 {
 	gb_connection_disable(svc->connection);
@@ -1012,6 +1020,8 @@ void gb_svc_del(struct gb_svc *svc)
 	}
 
 	flush_workqueue(svc->wq);
+
+	gb_svc_remove_interfaces(svc);
 }
 
 void gb_svc_put(struct gb_svc *svc)