Messages in this thread | | | Subject | Re: 2.6.8-rc4-mm1 doesn't boot | From | Len Brown <> | Date | 11 Aug 2004 17:32:00 -0400 |
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I've never understood this floppy IRQ6 business. Apparently it requests IRQ6, but doesn't show up in /proc/interrupts
In any case, dropping a PCI interrupt on IRQ6 would surely break it b/c that would set that IRQ6 to level trigger.
Before this change, did LNKD get set to something other than IRQ6?
-Len
On Wed, 2004-08-11 at 16:33, Bjorn Helgaas wrote: > On Tuesday 10 August 2004 5:56 pm, Adrian Bunk wrote: > > On Tue, Aug 10, 2004 at 04:46:57PM -0600, Bjorn Helgaas wrote: > > > On Tuesday 10 August 2004 11:32 am, Adrian Bunk wrote: > > > > On Tue, Aug 10, 2004 at 09:59:18AM -0600, Bjorn Helgaas wrote: > > > > > On Tuesday 10 August 2004 9:09 am, Adrian Bunk wrote: > > > > > > 2.6.8-rc3-mm1 boots fine on my computer. > > > > > > 2.6.8-rc4-mm1 doesn't boot. > > > > > > 2.6.8-rc4-mm1 with pci=routeirq boots. > > > > > It happens before the > > floppy0: no floppy controllers found > > line. > > > > Could there be a problem because the floppy driver doesn't find > > anything (there's currently no floppy drive in my computer)? > > Not only is your machine floppy drive-less, but the driver thinks you > don't even have a floppy *controller*, which I assume is separate > from the actual drive. > > What mainboard do you have? Does it boot without "pci=routeirq" > if you turn CONFIG_BLK_DEV_FD off? > > The code in the floppy_init() -> user_reset_fdc() -> WAIT() -> > wait_til_done() -> reset_fdc() path looks pretty scary if there > really is no controller out there. I'd feel much better if > we at least tried to use ACPI to figure out whether we have > a controller before we try to talk to it. > > All that aside, I still don't see how the pci=routeirq change > would affect the floppy driver. It does request_irq(6, ...), > and it is interesting that you have this: > > ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 6 > ACPI: PCI interrupt 0000:00:04.0[A] -> GSI 6 (level, low) -> IRQ 6 > > which is for your NIC. But the floppy controller isn't a PCI > device, so the LNKD enable shouldn't matter to it. > > Let's see... you're using the PIC model. Maybe the floppy driver > depends on the ACPI_IRQ_MODEL_PIC stuff in acpi_register_gsi()? > Can you post the contents of /proc/interrupts with the floppy > driver and "pci=routeirq"? It seems weird to have the floppy > and the NIC share an IRQ, but it looks like that's what should > be happening. > > Bjorn > - > To unsubscribe from this list: send the line "unsubscribe > linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >
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