linux-kernel - Re: [PATCH] Incorrect MSI interrupt type name

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Message-ID: <m1slgml98x.fsf@ebiederm.dsl.xmission.com>
Date:	Tue, 14 Nov 2006 01:31:42 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Andrew Morton <akpm@...l.org>
Cc:	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>,
	Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>,
	"linux-ia64@...r.kernel.org" <linux-ia64@...r.kernel.org>
Subject: Re: [PATCH] Incorrect MSI interrupt type name

Andrew Morton <akpm@...l.org> writes:

> On Tue, 14 Nov 2006 15:22:57 +0800
> "Zhang, Yanmin" <yanmin_zhang@...ux.intel.com> wrote:
>
>> /proc/interrupts shows "<NULL>" for MSI interrupt type name on
>> my ia64 machine.
>> 
>> Below patch against 2.6.19-rc5-mm1 fixes it.
>> 
>> Signed-off-by: Zhang Yanmin <yanmin.zhang@...el.com>
>> 
>> ---
>> 
>> --- linux-2.6.19-rc5-mm1/arch/ia64/kernel/msi_ia64.c 2006-11-14
> 14:16:12.000000000 +0800
>> +++ linux-2.6.19-rc5-mm1_fix/arch/ia64/kernel/msi_ia64.c 2006-11-14
> 15:08:37.000000000 +0800
>> @@ -115,7 +115,7 @@ static int ia64_msi_retrigger_irq(unsign
>>   * Generic ops used on most IA64 platforms.
>>   */
>>  static struct irq_chip ia64_msi_chip = {
>> -	.name		= "PCI-MSI",
>> +	.typename	= "PCI-MSI",
>>  	.mask		= mask_msi_irq,
>>  	.unmask		= unmask_msi_irq,
>>  	.ack		= ia64_ack_msi_irq,
>
> I think the bug is that ia64 is printing ->typename, whereas it should be
> printing ->name:

Looks right.   The basic issue is that the msi code is fully
genirq converted.  While the rest of the ia64 code has yet to
be updated.

But since irq_chip_set_defaults sets name and typename to be
the same I believe this patch is safe.

Eric


>  arch/ia64/kernel/iosapic.c |    2 +-
>  arch/ia64/kernel/irq.c     |    2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff -puN arch/ia64/kernel/iosapic.c~ia64-irqs-use-name-not-typename
> arch/ia64/kernel/iosapic.c
> --- a/arch/ia64/kernel/iosapic.c~ia64-irqs-use-name-not-typename
> +++ a/arch/ia64/kernel/iosapic.c
> @@ -664,7 +664,7 @@ register_intr (unsigned int gsi, int vec
>  			printk(KERN_WARNING
>  			       "%s: changing vector %d from %s to %s\n",
>  			       __FUNCTION__, vector,
> -			       idesc->chip->typename, irq_type->typename);
> +			       idesc->chip->name, irq_type->name);
>  		idesc->chip = irq_type;
>  	}
>  	return 0;
> diff -puN arch/ia64/kernel/irq.c~ia64-irqs-use-name-not-typename
> arch/ia64/kernel/irq.c
> --- a/arch/ia64/kernel/irq.c~ia64-irqs-use-name-not-typename
> +++ a/arch/ia64/kernel/irq.c
> @@ -76,7 +76,7 @@ int show_interrupts(struct seq_file *p, 
>  			seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
>  		}
>  #endif
> -		seq_printf(p, " %14s", irq_desc[i].chip->typename);
> +		seq_printf(p, " %14s", irq_desc[i].chip->name);
>  		seq_printf(p, "  %s", action->name);
>  
>  		for (action=action->next; action; action = action->next)
> _
-
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