linux-kernel - Re: [patch 22/53] PNP: factor pnp_init_resource_table() and pnp_clean_resource

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Date:	Sat, 19 Apr 2008 00:29:15 +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>,
	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>
Subject: Re: [patch 22/53] PNP: factor pnp_init_resource_table() and pnp_clean_resource_table()

On 18-04-08 22:50, Bjorn Helgaas wrote:

> Move the common part of pnp_init_resource_table() and
> pnp_clean_resource_table() into a new pnp_init_resource().
> This reduces a little code duplication and will be
> useful later to initialize an individual resource.

This can't be right, can it? :

> +void pnp_init_resource(struct resource *res)
> +{
> +	unsigned long type;
> +
> +	type = res->flags & (IORESOURCE_IO  | IORESOURCE_MEM |
> +			     IORESOURCE_IRQ | IORESOURCE_DMA);
> +
> +	res->name = NULL;
> +	res->flags = type | IORESOURCE_AUTO | IORESOURCE_UNSET;
> +	if (type == IORESOURCE_IRQ || type == IORESOURCE_DMA) {
> +		res->start = -1;
> +		res->end = -1;
> +	} else {
> +		res->start = 0;
> +		res->end = 0;
> +	}
> +}

This depends on the type already being set in res->flags, yet:

>  /**
>   * pnp_init_resources - Resets a resource table to default values.
>   * @table: pointer to the desired resource table
> @@ -209,34 +227,14 @@
>  	struct pnp_resource_table *table = &dev->res;
>  	int idx;
>  
> -	for (idx = 0; idx < PNP_MAX_IRQ; idx++) {
> -		table->irq_resource[idx].name = NULL;
> -		table->irq_resource[idx].start = -1;
> -		table->irq_resource[idx].end = -1;
> -		table->irq_resource[idx].flags =
> -		    IORESOURCE_IRQ | IORESOURCE_AUTO | IORESOURCE_UNSET;
> -	}
> -	for (idx = 0; idx < PNP_MAX_DMA; idx++) {
> -		table->dma_resource[idx].name = NULL;
> -		table->dma_resource[idx].start = -1;
> -		table->dma_resource[idx].end = -1;
> -		table->dma_resource[idx].flags =
> -		    IORESOURCE_DMA | IORESOURCE_AUTO | IORESOURCE_UNSET;
> -	}
> -	for (idx = 0; idx < PNP_MAX_PORT; idx++) {
> -		table->port_resource[idx].name = NULL;
> -		table->port_resource[idx].start = 0;
> -		table->port_resource[idx].end = 0;
> -		table->port_resource[idx].flags =
> -		    IORESOURCE_IO | IORESOURCE_AUTO | IORESOURCE_UNSET;
> -	}
> -	for (idx = 0; idx < PNP_MAX_MEM; idx++) {
> -		table->mem_resource[idx].name = NULL;
> -		table->mem_resource[idx].start = 0;
> -		table->mem_resource[idx].end = 0;
> -		table->mem_resource[idx].flags =
> -		    IORESOURCE_MEM | IORESOURCE_AUTO | IORESOURCE_UNSET;
> -	}
> +	for (idx = 0; idx < PNP_MAX_IRQ; idx++)
> +		pnp_init_resource(&table->irq_resource[idx]);
> +	for (idx = 0; idx < PNP_MAX_DMA; idx++)
> +		pnp_init_resource(&table->dma_resource[idx]);
> +	for (idx = 0; idx < PNP_MAX_PORT; idx++)
> +		pnp_init_resource(&table->port_resource[idx]);
> +	for (idx = 0; idx < PNP_MAX_MEM; idx++)
> +		pnp_init_resource(&table->mem_resource[idx]);
>  }

... it's not being set.

Rene.
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