Hi folks !
Current upstream, POWER7 machine running bare metal, there's no BIOS at
all, so the whole handover failing thing is an oddity in the first place
which I haven't tracked down yet, but it should cause that crash:
ohci_hcd 0000:07:02.0: OHCI Host Controller
ohci_hcd 0000:07:02.0: new USB bus registered, assigned bus number 4
ohci_hcd 0000:07:02.0: USB HC takeover failed! (BIOS/SMM bug)
ohci_hcd 0000:07:02.0: can't setup
ohci_hcd 0000:07:02.0: USB bus 4 deregistered
------------[ cut here ]------------
kernel BUG at /home/benh/linux-impreza/fs/dcache.c:419!
cpu 0x0: Vector: 700 (Program Check) at [c0000003dbb9b580]
pc: c00000000014848c: .dput+0x50/0x26c
lr: c00000000014847c: .dput+0x40/0x26c
sp: c0000003dbb9b800
msr: 9000000000029032
current = 0xc0000003dbc6cec0
paca = 0xc00000000ff88000
pid = 2185, comm = work_for_cpu
kernel BUG at /home/benh/linux-impreza/fs/dcache.c:419!
enter ? for help
[c0000003dbb9b800] c000000000148674 .dput+0x238/0x26c (unreliable)
[c0000003dbb9b8a0] c0000000004bfd44 .fs_remove_file+0x278/0x2dc
[c0000003dbb9b970] c0000000004c0374 .usbfs_notify+0x258/0x2e0
[c0000003dbb9ba20] c000000000602498 .notifier_call_chain+0x6c/0xe0
[c0000003dbb9bac0] c00000000008ffd4 .__blocking_notifier_call_chain
+0x60/0x90
[c0000003dbb9bb70] c0000000004bde70 .usb_notify_remove_bus+0x24/0x3c
[c0000003dbb9bbf0] c0000000004af760 .usb_deregister_bus+0x80/0xe0
[c0000003dbb9bc80] c0000000004b1274 .usb_add_hcd+0x6ec/0x750
[c0000003dbb9bd40] c0000000004bf284 .usb_hcd_pci_probe+0x1e0/0x2b0
[c0000003dbb9bde0] c000000000304ccc .local_pci_probe+0x34/0x48
[c0000003dbb9be50] c0000000000809ac .do_work_for_cpu+0x34/0x60
[c0000003dbb9bed0] c00000000008975c .kthread+0xb0/0xbc
[c0000003dbb9bf90] c00000000001ce98 .kernel_thread+0x54/0x70
0:mon>
Cheers,
Ben.
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