Though it looks a lot better; no more streams of messages.

Now when I resume, I get:

PCI: Enabling device 0000:00:1d.7 (0000 -> 0002)
<1>Unable to handle kernel NULL pointer dereference

a second or so after resume.  It is completely locked up at this point;
magic-sysreq gets no response.

lspci shows that 0000:00:1d.7 is

# lspci -v -s 0000:00:1d.7
00:1d.7 USB Controller: Intel Corp. 82801DB/DBM (ICH4/ICH4-M) USB2 EHCI Controller (rev 01) (prog-if 20 [EHCI])
        Subsystem: IBM: Unknown device 052e
        Flags: bus master, medium devsel, latency 0, IRQ 5
        Memory at c0000000 (32-bit, non-prefetchable) [size=1K]
        Capabilities: [50] Power Management version 2
        Capabilities: [58] Debug port

Complete lspci and .config attached.

   J