Re: Linux v2.6.12-rc4: IRQ14 nobody cared

[Paulo Marques <pmarques@grupopie.com>]

Bartlomiej Zolnierkiewicz wrote:
> On 5/9/05, Paulo Marques <pmarques@grupopie.com> wrote:
>>[...]
>>
>>2.6.12-rc4 halts during boot with a "IRQ 14: nobody cared" message.
>>
>>2.6.12-rc3 boots (and works) fine with the same configuration.
>>
>>[...]
> 
> Perhaps you can try first -rc3 git snapshot (still a lot of stuff):
> http://www.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.12-rc3-git1.bz2

I tried this version with the same results.

It seems that I've got something weird in my compilation setup.

I set up a serial console to see the messages from boot and near the 
beggining I get:

"Unknown bustype PCI    - ignoring"

The code that generates this is at arch/i386/mpparse.c:

> 	} else if (strncmp(str, BUSTYPE_PCI, sizeof(BUSTYPE_PCI)-1) == 0) {
> 		...
> 	} else if (strncmp(str, BUSTYPE_MCA, sizeof(BUSTYPE_MCA)-1) == 0) {
 >		...
> 	} else {
> 		printk(KERN_WARNING "Unknown bustype %s - ignoring\n", str);
> 	}

BUSTYPE_PCI is defined at include/asm-i386/mpspec_def.h:

#define BUSTYPE_PCI	"PCI"

so that first "if" statement translates to

 > 	} else if (strncmp(str, "PCI", 3) == 0) {

which should be always valid for "PCI   ", and that message should never 
appear :(

Well, sorry about the noise, I must dig deeper now...

-- 
Paulo Marques - www.grupopie.com

An expert is a person who has made all the mistakes that can be
made in a very narrow field.
Niels Bohr (1885 - 1962)