From acfab3733f406a5b052941ffacc70511e9723106 Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Tue, 27 Dec 2011 09:08:27 +1100
Subject: [PATCH] Handle upper case MAC addresses in ifname option

While the documentation states that ifname MAC addresses must be
lower case, we silently accept upper case ones and fail later on
when udev doesn't rename the device.

Instead of adding sanity checking on the MAC address just convert
it to lower case and remove the requirement completely.
---
 dracut.cmdline.7.xml                |    1 -
 modules.d/40network/parse-ifname.sh |    3 ++-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/dracut.cmdline.7.xml b/dracut.cmdline.7.xml
index 8a49056..9357e25 100644
--- a/dracut.cmdline.7.xml
+++ b/dracut.cmdline.7.xml
@@ -464,7 +464,6 @@ This parameter can be specified multiple times.</para>
           <term><envar>ifname=</envar><replaceable>&lt;interface&gt;</replaceable>:<replaceable>&lt;MAC&gt;</replaceable></term>
           <listitem>
             <para>Assign network device name &lt;interface&gt; (ie eth0) to the NIC with MAC &lt;MAC&gt;.
-Note letters in the MAC-address must be lowercase!
 <remark>Note: If you use this option you <emphasis remap="B">must</emphasis> specify an ifname= argument for all interfaces used in ip= or fcoe= arguments.</remark>
 This parameter can be specified multiple times.</para>
           </listitem>
diff --git a/modules.d/40network/parse-ifname.sh b/modules.d/40network/parse-ifname.sh
index 4c3c70e..26e6084 100755
--- a/modules.d/40network/parse-ifname.sh
+++ b/modules.d/40network/parse-ifname.sh
@@ -25,7 +25,8 @@ parse_ifname_opts() {
     case $# in
         7)
             ifname_if=$1
-            ifname_mac=$2:$3:$4:$5:$6:$7
+            # udev requires MAC addresses to be lower case
+            ifname_mac=`echo $2:$3:$4:$5:$6:$7 | tr '[:upper:]' '[:lower:]'`
             ;;
         *)
             die "Invalid arguments for ifname="