2.6.21 broke arm scsi on qemu -M volatilepb

[Rob Landley <rob@landley.net>]

Booting a 2.6.20 kernel under qemu works fine and gets me to a shell prompt, 
but booting a 2.6.21.1 kernel cycles endlessly on scsi, going:

Loading iSCSI transport class v2.0-724.
PCI: enabling device 0000:00:0c.0 (0140 -> 0143)
sym0: <895a> rev 0x0 at pci 0000:00:0c.0 irq 0
sym0: No NVRAM, ID 7, Fast-40, LVD, parity checking
sym0: SCSI BUS has been reset.
scsi0 : sym-2.2.3
scsi 0:0:0:0: ABORT operation started.
scsi 0:0:0:0: ABORT operation timed-out.
scsi 0:0:0:0: DEVICE RESET operation started.
scsi 0:0:0:0: DEVICE RESET operation timed-out.
scsi 0:0:0:0: BUS RESET operation started.
scsi 0:0:0:0: BUS RESET operation timed-out.
scsi 0:0:0:0: HOST RESET operation started.
sym0: SCSI BUS has been reset.
...
And so on.

If you're interested in reproducing this, download the most recent 
http://landley.net/hg/firmware snapshot (links up top), run "./build.sh 
armv4l", and when that's done "cd build" and "./run-armv4l.sh".

Is this a known issue?  A quick google for "arm scsi 2.6.21" didn't turn up 
anything relevant...

Rob
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