FC4 kernel-2.6.14-1.1644_FC4 -> buggy ohci1394

[davide.rossetti]

on my Toshiba M40 I had lots of trouble with netcard, Marvel Yukon 2.
Problem ended up being that ohci1394 crashes, disabling irq11 at all.
irq11 is used by Yukon. so no net. but I oversaw it, thinking it was 
benign.

It could even be a nasty interference among the many device 
sharing irq11:

            CPU0
   0:     405752          XT-PIC  timer
   1:       6824          XT-PIC  i8042
   2:          0          XT-PIC  cascade
   5:          0          XT-PIC  Intel ICH6 Modem
   6:          3          XT-PIC  ohci1394
   8:          1          XT-PIC  rtc
   9:         13          XT-PIC  acpi
  10:      35582          XT-PIC  Intel ICH6, ehci_hcd:usb1, uhci_hcd:usb2
  11:       3712          XT-PIC  uhci_hcd:usb3, uhci_hcd:usb4, uhci_hcd:usb5, yenta, sky2
  12:       1385          XT-PIC  i8042
  14:      23313          XT-PIC  libata
  15:      26495          XT-PIC  ide1
NMI:          0
ERR:          0


so, on kernel-2.6.14-1.1644_FC4, Pentium M 2GHz, 1GB RAM, I get:

Dec  9 00:25:06 localhost kernel: ohci1394: $Rev: 1313 $ Ben Collins <bcollins at debian.org>
Dec  9 00:25:06 localhost kernel: ACPI: PCI Interrupt Link [LNKG] enabledat IRQ 6
Dec  9 00:25:06 localhost kernel: PCI: setting IRQ 6 as level-triggered
Dec  9 00:25:06 localhost kernel: ACPI: PCI Interrupt 0000:06:06.2[C] -> Link [LNKG] -> GSI 6 (level, low) -> IRQ 6
Dec  9 00:25:06 localhost kernel: ohci1394: fw-host0: OHCI-1394 1.1 (PCI): 
IRQ=[6]  MMIO=[b0000000-b00007ff]  Max Packet=[2048]
Dec  9 00:25:06 localhost kernel: irq 11: nobody cared (try booting with 
the "irqpoll" option)
Dec  9 00:25:06 localhost kernel:  [<c013b1eb>] __report_bad_irq+0x24/0x7f
Dec  9 00:25:06 localhost kernel:  [<c013b2c6>] note_interrupt+0x62/0xac
Dec  9 00:25:06 localhost kernel:  [<c013acdd>] __do_IRQ+0xc4/0xd7
Dec  9 00:25:06 localhost kernel:  [<c01045cd>] do_IRQ+0x66/0x82
Dec  9 00:25:06 localhost kernel:  [<c01030aa>] common_interrupt+0x1a/0x20
Dec  9 00:25:06 localhost kernel:  [<c013abd6>] handle_IRQ_event+0x17/0x5a
Dec  9 00:25:06 localhost kernel:  [<c013ac91>] __do_IRQ+0x78/0xd7
Dec  9 00:25:06 localhost kernel:  [<c01045b1>] do_IRQ+0x4a/0x82
Dec  9 00:25:06 localhost kernel:  =======================
Dec  9 00:25:06 localhost kernel:  [<c01030aa>] common_interrupt+0x1a/0x20
Dec  9 00:25:06 localhost kernel:  [<c030cc0a>] _spin_unlock_irqrestore+0xa/0xc
Dec  9 00:25:06 localhost kernel:  [<f8a4226d>] ohci_devctl+0x40a/0x5f7 [ohci1394]
Dec  9 00:25:06 localhost kernel:  [<f8a9aa63>] csr1212_fill_cache+0xdf/0x106 [ieee1394]
Dec  9 00:25:06 localhost kernel:  [<f8a9abb0>] csr1212_generate_csr_image+0x126/0x249 [ieee1394]
Dec  9 00:25:06 localhost kernel:  [<f8a91135>] hpsb_reset_bus+0x20/0x26 [ieee1394]
Dec  9 00:25:06 localhost kernel:  [<c0129f10>] worker_thread+0x182/0x22a
Dec  9 00:25:06 localhost kernel:  [<c030cc11>] _spin_unlock_irq+0x5/0x7
Dec  9 00:25:06 localhost kernel:  [<f8a93268>] delayed_reset_bus+0x0/0xc0 [ieee1394]
Dec  9 00:25:06 localhost kernel:  [<c01176e4>] default_wake_function+0x0/0xc
Dec  9 00:25:06 localhost kernel:  [<c0129d8e>] worker_thread+0x0/0x22a
Dec  9 00:25:06 localhost kernel:  [<c012d80b>] kthread+0x87/0x8b
Dec  9 00:25:06 localhost kernel:  [<c012d784>] kthread+0x0/0x8b
Dec  9 00:25:06 localhost kernel:  [<c0101301>] kernel_thread_helper+0x5/0xb
Dec  9 00:25:06 localhost kernel: handlers:
Dec  9 00:25:06 localhost kernel: [<f8956725>] (ipw_isr+0x0/0xa5 [ipw2200])
Dec  9 00:25:06 localhost kernel: [<f8bf71f4>] (SkY2Isr+0x0/0x294 [sk98lin])
Dec  9 00:25:06 localhost kernel: [<c027c50b>] (usb_hcd_irq+0x0/0x48)
Dec  9 00:25:06 localhost last message repeated 2 times
Dec  9 00:25:06 localhost kernel: [<f8a2d958>] (yenta_interrupt+0x0/0xaf [yenta_socket])

booting with:
#alias ieee1394-controller ohci1394
in /etc/modprobe.conf, it's magically all ok. no kernel msg reporting 
problems.

but, why the hell ohci on irq6 is disturbing devices on irq11 ??


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