greybus: interface: add active state flag

Add active state flag to avoid deactivating an interface which is
already off.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

diff --git a/drivers/staging/greybus/interface.c b/drivers/staging/greybus/interface.c
index 2553312..e0c38f1 100644 (file)
--- a/drivers/staging/greybus/interface.c
+++ b/drivers/staging/greybus/interface.c
@@ -409,6 +409,8 @@ int gb_interface_activate(struct gb_interface *intf)
        if (ret)
                return ret;
 
+       intf->active = true;
+
        return 0;
 }
 
@@ -419,7 +421,12 @@ int gb_interface_activate(struct gb_interface *intf)
  */
 void gb_interface_deactivate(struct gb_interface *intf)
 {
+       if (!intf->active)
+               return;
+
        gb_interface_route_destroy(intf);
+
+       intf->active = false;
 }
 
 /*

diff --git a/drivers/staging/greybus/interface.h b/drivers/staging/greybus/interface.h
index 61399e7..c9c1c92 100644 (file)
--- a/drivers/staging/greybus/interface.h
+++ b/drivers/staging/greybus/interface.h
@@ -43,6 +43,7 @@ struct gb_interface {
 
        bool disconnected;
        bool ejected;
+       bool active;
        bool enabled;
 };
 #define to_gb_interface(d) container_of(d, struct gb_interface, dev)