From mboxrd@z Thu Jan  1 00:00:00 1970
From: thomas schorpp <t.schorpp@gmx.de>
Subject: Re: aic7xxx: aic7892(B): BUG: soft lockup detected on CPU#0!
Date: Thu, 22 Mar 2007 22:02:13 +0100
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[    0.000000] Linux version 2.6.21-rc3amd64-gbb9ba31c-dirty (root@tom1) (gcc ve
rsion 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)) #3 PREEMPT Thu Mar 22 21:48
:44 CET 2007

added some traces,
ok it does not return from the first pci_map_registers():

[   42.754305] Loading iSCSI transport class v2.0-724.
[   42.759656] iscsi: registered transport (tcp)
[   42.764016] ahc_linux_pci_init
[   42.767207] ahc_linux_pci_dev_probe
[   42.770744] ACPI: PCI Interrupt 0000:00:06.0[A] -> GSI 17 (level, low) -> IRQ
 17
[   42.778160] ahc_pci_config
[   42.780861] set_power_state
[   42.783656] map_registers

tracing further and provide args dump if applicable