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Subject: Re: 2.6.8-rc4-mm1 doesn't boot
From: Len Brown <len.brown@intel.com>
To: Adrian Bunk <bunk@fs.tum.de>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>, Andrew Morton <akpm@osdl.org>,
       linux-kernel@vger.kernel.org
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Does the system have any BIOS settings to enable/disable the floppy?
Is the floppy physically present on the system?

ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 *6 7 10 11 12 14 15)
        ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 6

I assert it is a BIOS bug for the BIOS to set LNKD to
IRQ6 if there is a floppy present and enabled; but fair
game if there is no floppy.  Though perhaps floppy.c
doesn't understand that.

-Len

On Wed, 2004-08-11 at 17:51, Adrian Bunk wrote:
> On Wed, Aug 11, 2004 at 05:32:00PM -0400, Len Brown wrote:
> > 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?
> 
> Yes, this is my 2.6.8-rc3-mm1 /proc/interrupts :
> 
> <--  snip  -->
> 
>            CPU0       
>   0:   17615908          XT-PIC  timer
>   1:      22333          XT-PIC  i8042
>   2:          0          XT-PIC  cascade
>   6:      94751          XT-PIC  eth0
>   8:          4          XT-PIC  rtc
>   9:          0          XT-PIC  acpi
>  10:       5119          XT-PIC  ehci_hcd
>  11:    1329292          XT-PIC  Ensoniq AudioPCI, radeon@PCI:1:0:0
>  12:     118130          XT-PIC  i8042
>  14:      44614          XT-PIC  ide0
>  15:         24          XT-PIC  ide1
> NMI:          0 
> ERR:          8
> 
> <--  snip  -->
> 
> 
> > -Len
> 
> cu
> Adrian
> 
> -- 
> 
>        "Is there not promise of rain?" Ling Tan asked suddenly out
>         of the darkness. There had been need of rain for many days.
>        "Only a promise," Lao Er said.
>                                        Pearl S. Buck - Dragon Seed
>