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Subjectohci1394 issues ( 2.6.5-rc2 and beyond )
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I'm running a linux 2.6.5-rc2-mm5 kernel atm... motherboard is an Abit 
NF7-s with an onboard firewire controller (I assume Nforce2 chipset).

I get this loveliness everytime I modprobe ohci1394:

ohci1394: fw-host0: OHCI-1394 1.1 (PCI): IRQ=[5]
MMIO=[e0084000-e00847ff] Max
Packet=[2048]
Badness in get_phy_reg at drivers/ieee1394/ohci1394.c:238
Call Trace:
[<f8bb710e>] get_phy_reg+0x10e/0x120 [ohci1394]
[<f8bb7f3c>] ohci_devctl+0x5c/0x5d0 [ohci1394]
[<c03f23c0>] common_interrupt+0x18/0x20
[<c0113d54>] delay_tsc+0x14/0x20
[<f8bba058>] ohci_irq_handler+0x588/0x830 [ohci1394]
[<c012643f>] do_timer+0xdf/0xf0
[<c010a8ca>] handle_IRQ_event+0x3a/0x70
[<c010ac85>] do_IRQ+0xd5/0x1b0
=======================
[<c03f23c0>] common_interrupt+0x18/0x20
[<f8bb7193>] set_phy_reg+0x73/0x120 [ohci1394]
[<f8bd5d40>] delayed_reset_bus+0x0/0xd0 [ieee1394]
[<f8bb7f56>] ohci_devctl+0x76/0x5d0 [ohci1394]
[<f8bde3b7>] csr1212_fill_cache+0x97/0x100 [ieee1394]
[<f8bd5d40>] delayed_reset_bus+0x0/0xd0 [ieee1394]
[<f8bd31a5>] hpsb_reset_bus+0x35/0x40 [ieee1394]
[<f8bd5df4>] delayed_reset_bus+0xb4/0xd0 [ieee1394]
[<c0126254>] run_timer_softirq+0xd4/0x1d0
[<c0121e7d>] __do_softirq+0x7d/0x80
[<c010b57e>] do_softirq+0x4e/0x60
=======================
[<c010ad0b>] do_IRQ+0x15b/0x1b0
[<c03f23c0>] common_interrupt+0x18/0x20
[<c0107053>] default_idle+0x23/0x30
[<c01070bc>] cpu_idle+0x2c/0x40
[<c04fc897>] start_kernel+0x197/0x1e0
[<c04fc450>] unknown_bootoption+0x0/0x120

Badness in set_phy_reg at drivers/ieee1394/ohci1394.c:267
Call Trace:
[<f8bb7230>] set_phy_reg+0x110/0x120 [ohci1394]
[<f8bb7f56>] ohci_devctl+0x76/0x5d0 [ohci1394]
[<c0113d54>] delay_tsc+0x14/0x20
[<f8bba058>] ohci_irq_handler+0x588/0x830 [ohci1394]
[<c012643f>] do_timer+0xdf/0xf0
[<c010a8ca>] handle_IRQ_event+0x3a/0x70
[<c010ac85>] do_IRQ+0xd5/0x1b0
=======================
[<c03f23c0>] common_interrupt+0x18/0x20
[<f8bb7193>] set_phy_reg+0x73/0x120 [ohci1394]
[<f8bd5d40>] delayed_reset_bus+0x0/0xd0 [ieee1394]
[<f8bb7f56>] ohci_devctl+0x76/0x5d0 [ohci1394]
[<f8bde3b7>] csr1212_fill_cache+0x97/0x100 [ieee1394]
[<f8bd5d40>] delayed_reset_bus+0x0/0xd0 [ieee1394]
[<f8bd31a5>] hpsb_reset_bus+0x35/0x40 [ieee1394]
[<f8bd5df4>] delayed_reset_bus+0xb4/0xd0 [ieee1394]
[<c0126254>] run_timer_softirq+0xd4/0x1d0
[<c0121e7d>] __do_softirq+0x7d/0x80
[<c010b57e>] do_softirq+0x4e/0x60
=======================
[<c010ad0b>] do_IRQ+0x15b/0x1b0
[<c03f23c0>] common_interrupt+0x18/0x20
[<c0107053>] default_idle+0x23/0x30
[<c01070bc>] cpu_idle+0x2c/0x40
[<c04fc897>] start_kernel+0x197/0x1e0
[<c04fc450>] unknown_bootoption+0x0/0x120

ohci1394: fw-host0: SelfID received outside of bus reset sequence
ieee1394: Host added: ID:BUS[0-00:1023] GUID[000000508dfea614]

Evidently, it still loads although the error about SelfID indicates
already that something is not quite right.

Further fun continues when plugging in my firewire hard drive (it's a
Maxtor external 160 gb, pretty generic as far as external firewire
hard drives go). About one out of five times I will get a hard drive
mountable via /dev/sdc... other times, the kernel's SCSI module will
backtrace and not work, or it will give me a series of errors from
sbp2 (can't login to device, device timed out, could not read config
rom, etc).

As far as I can remember, I never had these issues with 2.6.4 kernel,
so it's something that's been added in the devel tree.

Also, this is my first post on LKML so if anybody feels like
nitpicking any aspect of it, please do so (preferably without ccing
the list, as that'll just add noise). I'm all about netiquette :)


- Mike

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