ipr boot failure caused by MSI (2.6.30-rc1+)

James Bottomley
2009-05-21T17:15:59Z

Kernels after 2.6.30-rc1 stopped booting on my powerstation. The ipr
just times out and refuses to probe devices. If I let it drop into the
initramfs system, this is what the interrupts shows:

(initramfs) cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3
16: 20 10 13 11 MPIC Level pata_amd
20: 0 0 0 0 MPIC Level ohci_hcd:usb1, ohci_hcd:usb2
21: 0 0 0 0 MPIC-U3MSI Edge ipr
68: 37 37 48 37 MPIC Edge serial
251: 10 71 69 72 MPIC Edge ipi call function
252: 1555 1779 1372 1155 MPIC Edge ipi reschedule
253: 0 0 0 0 MPIC Edge ipi call function single
254: 0 0 0 0 MPIC Edge ipi debugger
BAD: 416

So you see the IPR is the only device not receiving them.

I can fix the boot hang by reverting

commit 5a9ef25b14d39b8413364df12cb8d9bb7a673a32
Author: Wayne Boyer <wayneb@linux.vnet.ibm.com>
Date: Fri Jan 23 09:17:35 2009 -0800

[SCSI] ipr: add MSI support

The system in question is:

SYSTEM INFORMATION
Processor = PowerPC,970MP @ 2500 MHz
I/O Bridge = U4 (4.4)
SMP Size = 4 (#0 #1 #2 #3)
Boot-Date = 2009-04-21 17:13:36
Memory = 2 GB of RAM @ 666 MHz
Board Type = Bimini (7047191/0000000/1)
MFG Date = 1608
Part No. = 10N8748
FRU No. = 10N7182
FRU Serial = YL30W8106038
UUID = 00000000000000000000000000000000
Flashside = 1 (temporary)
Version = HEAD
Build Date = 12-04-2008 16:13

James