Index: package/base-files/files/lib/network/config.sh
===================================================================
--- package/base-files/files/lib/network/config.sh      (revision 7069)
+++ package/base-files/files/lib/network/config.sh      (working copy)
@@ -75,6 +75,8 @@
        # to create any interfaces here. The scripts have already done that, otherwise
        # the bridge interface wouldn't exist.
        [ "$iface" = "br-$config" ] && return 0;
+
+       [ -f "$iface" ] && return 0;

        ifconfig "$iface" 2>/dev/null >/dev/null && {
                # make sure the interface is removed from any existing bridge and brought down
Index: package/kernel/modules/usb.mk
===================================================================
--- package/kernel/modules/usb.mk       (revision 7069)
+++ package/kernel/modules/usb.mk       (working copy)
@@ -170,6 +170,16 @@
 endef
 $(eval $(call KernelPackage,usb-serial))

+define KernelPackage/usb-serial-airprime
+  TITLE:=Support for Airprime (EVDO)
+  DESCRIPTION:=Kernel support for Airprime (EVDO)
+  DEPENDS:=kmod-usb-serial
+  SUBMENU:=$(USBMENU)
+  KCONFIG:=$(CONFIG_USB_SERIAL_AIRPRIME)
+  FILES:=$(LINUX_DIR)/drivers/usb/serial/airprime.$(LINUX_KMOD_SUFFIX)
+  AUTOLOAD:=$(call AutoLoad,65,airprime)
+endef
+$(eval $(call KernelPackage,usb-serial-airprime))

 define KernelPackage/usb-serial-belkin
   TITLE:=Support for Belkin devices
Index: package/ppp/files/ppp.sh
===================================================================
--- package/ppp/files/ppp.sh    (revision 7069)
+++ package/ppp/files/ppp.sh    (working copy)
@@ -21,6 +21,10 @@
        config_get username "$cfg" username
        config_get password "$cfg" password
        config_get keepalive "$cfg" keepalive
+
+       config_get connect "$cfg" connect
+       config_get disconnect "$cfg" disconnect
+
        interval="${keepalive##*[, ]}"
        [ "$interval" != "$keepalive" ] || interval=5

@@ -34,7 +38,23 @@
                replacedefaultroute \
                ${username:+user "$username" password "$password"} \
                linkname "$cfg" \
-               ipparam "$cfg"
+               ipparam "$cfg" \
+               ${connect:+connect "$connect"} \
+               ${disconnect:+disconnect "$disconnect"}

        lock -u "/var/lock/ppp-${cfg}"
 }
+
+setup_interface_ppp() {
+       local iface="$1"
+       local config="$2"
+
+       config_get device "$config" device
+
+       config_get mtu "$cfg" mtu
+       mtu=${mtu:-1492}
+       start_pppd "$config" \
+               mtu $mtu mru $mtu \
+               "$device"
+}
+