[BUG] 2.6.30-rc broke ixp4xx_eth, firmware breakage?

[Mikael Pettersson]

The ixp4xx_eth driver for my IXP420 XScale box (Synology DS101)
worked fine in kernel 2.6.29. Now trying to boot 2.6.30-rc2 I'm
greeted with the following failure during init:

Bringing up interface eth0:  RTNETLINK answers: No such file or directory
Failed to bring up eth0.
[FAILED]

There's a fairly long (at least 10 seconds) delay between the 'Bringing up'
message and the RTNETLINK error.

A diff between the 2.6.29 and 2.6.30-rc2 boot logs indicates that
the firmware doesn't get loaded:

--- dmesg-2.6.29	2009-04-18 23:26:30.000000000 +0200
+++ dmesg-2.6.30-rc2	2009-04-18 23:24:03.000000000 +0200
@@ -221,11 +222,9 @@
 kjournald starting.  Commit interval 5 seconds
 EXT3 FS on sda8, internal journal
 EXT3-fs: mounted filesystem with ordered data mode.
-net eth0: firmware: requesting NPE-C
-NPE-C: firmware functionality 0x0, revision 0x2:1
-NET: Registered protocol family 17
-eth0: link up, speed 100 Mb/s, full duplex
 Adding 2000336k swap on /dev/sda5.  Priority:-1 extents:1 across:2000336k 
+NET: Registered protocol family 17
+net eth0: firmware: requesting NPE-C
 RPC: Registered udp transport module.
 RPC: Registered tcp transport module.
 warning: `dbus-daemon' uses 32-bit capabilities (legacy support in use)

I'll try to debug this tomorrow, but I may not have time for a proper
debug session until next weekend.

/Mikael
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