linux-atm: add wrapper for br2684ctl to defer nasX device bringup

Fixes a race condition on netifd device bringup.

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

SVN-Revision: 47891

package/network/utils/linux-atm/Makefile

@@ -182,7 +182,10 @@ define Package/br2684ctl/install
 	$(INSTALL_BIN) ./files/br2684ctl $(1)/etc/init.d/
 	$(INSTALL_DATA) ./files/atm.hotplug $(1)/etc/hotplug.d/atm/00-trigger
 	$(INSTALL_DIR) $(1)/usr/sbin
-	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/sbin/br2684ctl $(1)/usr/sbin/
+	$(INSTALL_BIN) \
+		./files/br2684ctl_wrap \
+		$(PKG_INSTALL_DIR)/usr/sbin/br2684ctl \
+		$(1)/usr/sbin/
 endef
 
 $(eval $(call BuildPackage,linux-atm))

package/network/utils/linux-atm/files/br2684ctl

@@ -58,7 +58,7 @@ start_daemon() {
 
 	procd_open_instance
 	procd_set_param command \
-		/usr/sbin/br2684ctl \
+		/usr/sbin/br2684ctl_wrap "nas$unit" \
 		-c "$unit" -e "$encaps" -p "$payload" \
 		-a "$circuit" ${qos:+-q "$qos"} ${sendsize:+-s "$sendsize"}
 	procd_close_instance

package/network/utils/linux-atm/files/br2684ctl_wrap

@@ -0,0 +1,5 @@
+#!/bin/sh
+. /lib/functions/network.sh
+device="$1"; shift
+network_defer_device "$device"
+exec /usr/sbin/br2684ctl "$@"