From: Jim Paris <jim@jtan.com>
To: linux-kernel@vger.kernel.org
Subject: PCI IRQ problems: "nobody cared!"
Date: Fri, 15 Oct 2004 04:37:22 -0400 [thread overview]
Message-ID: <20041015083722.GA3315@jim.sh> (raw)
I'm having some strange PCI IRQ problems on my new laptop (Panasonic
Toughbook CF-M34UTVZKM) under 2.6.8-1-686 (Debian). I'm at a loss to
figure out their source, other than the fact that Toughbooks seem to
have a particularly crappy BIOS.
The errors are something like this (taken from default.txt, link below):
irq 9: nobody cared!
[<c010841a>] __report_bad_irq+0x2a/0x90
[<c0108510>] note_interrupt+0x70/0xb0
[<c01087f0>] do_IRQ+0x120/0x130
[<c0106a20>] common_interrupt+0x18/0x20
[<c01200fe>] __do_softirq+0x2e/0x80
[<c01b3b60>] acpi_irq+0x0/0x16
[<c0120177>] do_softirq+0x27/0x30
[<c01087cb>] do_IRQ+0xfb/0x130
[<c0106a20>] common_interrupt+0x18/0x20
[<c02124a2>] pci_conf1_write+0x92/0xf0
[<c01b3e86>] acpi_os_write_pci_configuration+0x69/0x76
...
It seems that once some particular piece of PCI hardware gets
initialized, it causes a flood of unexpected interrupts. The kernel
then disables IRQ 9, which basically breaks most of my devices because
that's the one they all share.
I captured the following boots for different command lines. The ACPI
and non-ACPI cases die at different points, but with the same result.
root=/dev/hda1 ro console=ttyS0,115200n8
https://jim.sh/svn/jim/devl/toughbook/log/default.txt
root=/dev/hda1 ro console=ttyS0,115200n8 acpi=off
https://jim.sh/svn/jim/devl/toughbook/log/acpioff.txt
root=/dev/hda1 ro console=ttyS0,115200n8 acpi=off pci=usepirqmask
https://jim.sh/svn/jim/devl/toughbook/log/usepirqmask.txt
lspci, lspci -vxxxn, and /proc/interrupts:
https://jim.sh/svn/jim/devl/toughbook/log/lspci.txt
Could someone who knows more than me about PCI IRQs take a quick look
at those dumps and tell me if there's anything obvious that I'm
missing, or some way to work around the problem?
-jim
next reply other threads:[~2004-10-15 8:37 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-15 8:37 Jim Paris [this message]
2004-10-15 13:19 ` PCI IRQ problems: "nobody cared!" Alan Cox
2004-10-15 18:51 ` Jim Paris
2004-10-16 5:55 ` Len Brown
2004-10-17 0:12 ` Jim Paris
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