Re: [PATCH] iqrdomain: Improve formatting in debugfs.

[David Daney]

On 04/11/2012 12:03 AM, Grant Likely wrote:
> On Mon,  9 Apr 2012 17:06:57 -0700, David Daney<ddaney.cavm@xxxxxxxxx>  wrote:
> > From: David Daney<david.daney@xxxxxxxxxx>
> >
> > The irq_domain_mapping file has some interesting output when chip_data
> > contains leading zeros:
> >
> > virq   hwirq    chip name        chip data           domain name
> > .
> > .
> > .
> >    103  0x00000  CIU2-W           0x 5e0000000000000  none
> >    104  0x00000  CIU2-W           0x 5f0000000000000  none
> >    105  0x00000  CIU2-M           0x          (null)  none
> >    113  0x00000  CIU2-E           0x1080000000000000  none
> > .
> > .
> > .
> >
> > I think there should be no space in there between the "0x" and the
> > rest.  Also the '(null)' entry doesn't make much sense at all with a
> > "0x".
>
> Yeah, it doesn't make much sense with the '0x', but I don't want to
> supress the (null) output because it is really important to highlight
> when a domain isn't assigned to an active irq.
>
> Fixing the zero pad is trivial to fix though.  Just remove the
> precision from the %p format.  Here's my counter-patch:

This is good too.

FWIW:
Acked-by: David Daney <david.daney@xxxxxxxxxx>


> ---
>
> diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
> index 9310a8d..eb05e40 100644
> --- a/kernel/irq/irqdomain.c
> +++ b/kernel/irq/irqdomain.c
> @@ -643,8 +643,8 @@ static int virq_debug_show(struct seq_file *m, void *private)
>   	void *data;
>   	int i;
>
> -	seq_printf(m, "%-5s  %-7s  %-15s  %-18s  %s\n", "virq", "hwirq",
> -		      "chip name", "chip data", "domain name");
> +	seq_printf(m, "%-5s  %-7s  %-15s  %-*s  %s\n", "irq", "hwirq",
> +		      "chip name", 2 * sizeof(void *) + 2, "chip data", "domain name");
>
>   	for (i = 1; i<  nr_irqs; i++) {
>   		desc = irq_to_desc(i);
> @@ -667,7 +667,7 @@ static int virq_debug_show(struct seq_file *m, void *private)
>   			seq_printf(m, "%-15s  ", p);
>
>   			data = irq_desc_get_chip_data(desc);
> -			seq_printf(m, "0x%16p  ", data);
> +			seq_printf(m, data ? "0x%p  " : "  %p  ", data);
>
>   			if (desc->irq_data.domain&&  desc->irq_data.domain->of_node)
>   				p = desc->irq_data.domain->of_node->full_name;

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