I'm oopsing on shutdown on a machine that has a Via Rhine adapter in it:

Unable to handle kernel paging request at virtual address e0803003
[...]
EIP is at ioread8+0x2c/0x40
Call Trace:
 [<c0103d5f>] show_stack+0x7f/0xa0
 [<c0103efa>] show_registers+0x15a/0x1c0
 [<c01040ce>] die+0xce/0x150
 [<c0113406>] do_page_fault+0x356/0x692
 [<c01039ff>] error_code+0x2b/0x30
 [<c026b490>] rhine_shutdown+0x60/0x140
 [<c0253ad9>] device_shutdown+0x89/0x8b
 [<c012461c>] sys_reboot+0xac/0x200
 [<c0102f71>] sysenter_past_esp+0x52/0x75


Seems like it is the ioread8 in:

        /* Hit power state D3 (sleep) */
        iowrite8(ioread8(ioaddr + StickyHW) | 0x03, ioaddr + StickyHW);

that fails. StickyHW is 0x83. lspci says:

0000:00:07.0 Ethernet controller: VIA Technologies, Inc. VT86C100A [Rhine] (rev 06)
        Flags: bus master, medium devsel, latency 32, IRQ 18
        I/O ports at ec00 [size=128]
        Memory at dfffff80 (32-bit, non-prefetchable) [size=128]

In other words, it's trying to read outside of the I/O range (0x80),
which matches the fauling address.

I'm guessing my chip revision doesn't support WOL, it's a crappy noname
card.

It does seem as if rhine_power_init checks quirks for rqWOL before
touching any registers. Should rhine_shutdown do the same? Proposed
patch below, which resolves the problem on my system.
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>