Staging: batman-adv: Don't call free_netdev twice

Free_netdev is registered as destructor in interface_setup for every
soft_device. This destructor is automatically called from
unregister_netdev and we must not call it again for the freed
net_device.

Signed-off-by: Sven Eckelmann <sven.eckelmann@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/staging/batman-adv/main.c b/drivers/staging/batman-adv/main.c
index 50a66b42d476..74c70d589a93 100644
--- a/drivers/staging/batman-adv/main.c
+++ b/drivers/staging/batman-adv/main.c
@@ -128,6 +128,9 @@ int init_module(void)
 
 unreg_soft_device:
         unregister_netdev(soft_device);
+        soft_device = NULL;
+        return -ENOMEM;
+
 free_soft_device:
         free_netdev(soft_device);
         soft_device = NULL;