fcoe-uefi: try all FcoeBootDevice-* variables for a DevicePath

try to read the DevicePath from all FcoeBootDevice-* UEFI variables
until one has a MAC.

modules.d/95fcoe-uefi/parse-uefifcoe.sh

@@ -9,10 +9,10 @@ command -v set_ifname >/dev/null || . /lib/net-lib.sh
 print_fcoe_uefi_conf()
 {
     local mac dev vlan
-    mac=$(get_fcoe_boot_mac)
-    [ -z "$mac" ] && continue
+    mac=$(get_fcoe_boot_mac "$1")
+    [ -z "$mac" ] && return 1
     dev=$(set_ifname fcoe $mac)
-    vlan=$(get_fcoe_boot_vlan)
+    vlan=$(get_fcoe_boot_vlan  "$1")
     if [ "$vlan" -ne "0" ]; then
         case "$vlan" in
             [0-9]*)
@@ -27,9 +27,10 @@ print_fcoe_uefi_conf()
     fi
     # fcoe=eth0:nodcb
     printf "%s\n" "$dev:nodcb"
+    return 0
 }
 
-
-if [ -e /sys/firmware/efi/vars/FcoeBootDevice-a0ebca23-5f9c-447a-a268-22b6c158c2ac/data ]; then
-    print_fcoe_uefi_conf > /etc/cmdline.d/40-fcoe-uefi.conf
-fi
+for i in /sys/firmware/efi/vars/FcoeBootDevice-*/data; do
+    [ -e "$i" ] || continue
+    print_fcoe_uefi_conf $i > /etc/cmdline.d/40-fcoe-uefi.conf && break
+done