linux-kernel - Re: [patch 11/15] PNP: centralize resource option allocations

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Date:	Mon, 02 Jun 2008 01:21:10 +0200
From:	Rene Herman <rene.herman@...access.nl>
To:	Bjorn Helgaas <bjorn.helgaas@...com>
CC:	Len Brown <lenb@...nel.org>, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, Adam Belay <ambx1@....rr.com>,
	Adam M Belay <abelay@....edu>,
	Li Shaohua <shaohua.li@...el.com>,
	Matthieu Castet <castet.matthieu@...e.fr>,
	Thomas Renninger <trenn@...e.de>,
	Jaroslav Kysela <perex@...ex.cz>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Takashi Iwai <tiwai@...e.de>
Subject: Re: [patch 11/15] PNP: centralize resource option allocations

On 31-05-08 00:49, Bjorn Helgaas wrote:

> This patch moves all the option allocations (pnp_mem, pnp_port, etc)
> into the pnp_register_{mem,port,irq,dma}_resource() functions.  This
> will make it easier to rework the option data structures.
> 
> The non-trivial part of this patch is the IRQ handling.  The backends
> have to allocate a local pnp_irq_mask_t bitmap, populate it, and pass
> a pointer to pnp_register_irq_resource().
> 
> Signed-off-by: Bjorn Helgaas <bjorn.helgaas@...com>

[ ... ]

> Index: work10/drivers/pnp/isapnp/core.c
> ===================================================================
> --- work10.orig/drivers/pnp/isapnp/core.c	2008-05-30 13:20:36.000000000 -0600
> +++ work10/drivers/pnp/isapnp/core.c	2008-05-30 13:23:34.000000000 -0600
> @@ -433,20 +433,23 @@ static void __init isapnp_parse_irq_reso
>  					     int size)
>  {
>  	unsigned char tmp[3];
> -	struct pnp_irq *irq;
>  	unsigned long bits;
> +	int i;
> +	pnp_irq_mask_t map;
> +	unsigned char flags = IORESOURCE_IRQ_HIGHEDGE;
>  
>  	isapnp_peek(tmp, size);
> -	irq = kzalloc(sizeof(struct pnp_irq), GFP_KERNEL);
> -	if (!irq)
> -		return;
>  	bits = (tmp[1] << 8) | tmp[0];
> -	bitmap_copy(irq->map.bits, &bits, 16);
> +
> +	bitmap_zero(map.bits, PNP_IRQ_NR);
> +	for (i = 0; i < 15; i++)
> +		if (bits & (1 << i))
> +			__set_bit(i, map.bits);
> +

for (i = 0; i < 16; i++) (16 instead of 15) it would seem.

And why not simply:

bitmap_zero(map.bits, PNP_IRQ_NR);
bitmap_copy(map.bits, &bits, 16);

That last bit of the comment same for pnpbios_parse_irq_option(). Should 
  be fine, no?

>  static __init void pnpbios_parse_port_option(struct pnp_dev *dev,
>  					     unsigned char *p, int size,
>  					     struct pnp_option *option)
>  {
> -	struct pnp_port *port;
> +	resource_size_t min, max, align, len, flags;

unsigned char flags;

All the rest:

Acked-by: Rene Herman <rene.herman@...il.com>

Rene.
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