From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Gleixner <tglx@linutronix.de>
Subject: Re: 2.6.21-rc3-git4 ata1.00: qc timeout (cmd 0xef) (crashdump
	kernel)
Date: Mon, 12 Mar 2007 17:47:44 +0100
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To: Tejun Heo <htejun@gmail.com>
Cc: Michal Piotrowski <michal.k.k.piotrowski@gmail.com>, Jeff Garzik <jeff@garzik.org>, linux-ide@vger.kernel.org, Ingo Molnar <mingo@elte.hu>, Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>, Stephen Hemminger <shemminger@linux-foundation.org>, netdev@vger.kernel.org, Alan Cox <alan@lxorguk.ukuu.org.uk>
List-Id: linux-ide@vger.kernel.org

On Tue, 2007-03-13 at 01:37 +0900, Tejun Heo wrote:
> Michal Piotrowski wrote:
> > Calling initcall 0xc19154d8: piix_ide_init+0x0/0xbb()
> > Calling initcall 0xc19155b6: generic_ide_init+0x0/0x16()
> > Calling initcall 0xc191572e: ide_init+0x0/0x81()
> > Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
> > ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
> > ICH5: IDE controller at PCI slot 0000:00:1f.1
> > irq 5: nobody cared (try booting with the "irqpoll" option)
> >  [<c1604556>] show_trace_log_lvl+0x1a/0x2f
> >  [<c1604c2c>] show_trace+0x12/0x14
> >  [<c1604cde>] dump_stack+0x16/0x18
> >  [<c164341c>] __report_bad_irq+0x39/0x79
> >  [<c16435eb>] note_interrupt+0x18f/0x1c8
> >  [<c1643ec6>] handle_level_irq+0x95/0xcb
> >  [<c1605dd8>] do_IRQ+0xb4/0xe0
> >  =======================
> > handlers:
> > [<c174f55e>] (skge_intr+0x0/0x3ff)
> > Disabling IRQ #5
> > ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 5
> > ACPI: PCI Interrupt 0000:00:1f.1[A] -> Link [LNKC] -> GSI 5 (level, low) -> IRQ 5
> > ICH5: chipset revision 2
> > ICH5: not 100% native mode: will probe irqs later
> >     ide0: BM-DMA at 0xfc00-0xfc07, BIOS settings: hda:DMA, hdb:DMA
> >     ide1: BM-DMA at 0xfc08-0xfc0f, BIOS settings: hdc:pio, hdd:DMA
> > 
> > Is this an IDE or skge bug?
> 
> It seems skge's.  skge is screaming and kernel shuts down IRQ 5.
> ata_piix is unfortunately sharing the IRQ, so its IRQ doesn't get
> serviced and commands time out.

I doubt that. On my box the interrupt is solely used by ata_piix.

	tglx