interface: fix restart after reload with external devices

When an interface goes down, the main_dev is reset to NULL.
Track an externally added device separately to be able to bring it back
up.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/interface.h b/interface.h
index 6cfe264..1cd7e96 100644
--- a/interface.h
+++ b/interface.h
@@ -119,6 +119,7 @@ struct interface {
 
 	/* main interface that the interface is bound to */
 	struct device_user main_dev;
+	struct device_user ext_dev;
 
 	/* interface that layer 3 communication will go through */
 	struct device_user l3_dev;