Commit a50b6d7b authored by Bjorn Helgaas's avatar Bjorn Helgaas Committed by Len Brown
Browse files

PNP: add pnp_new_resource() to find a new unset pnp_resource 



This encapsulates the code to locate a new pnp_resource of the
desired type.  Currently this uses the pnp_resource_table, but
it will soon change to find a resource in a linked list.

Signed-off-by: default avatarBjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 21855d69

drivers/pnp/resource.c

+38 −0
Original line number Diff line number Diff line
@@ -538,6 +538,44 @@ struct resource *pnp_get_resource(struct pnp_dev *dev, 
}

EXPORT_SYMBOL(pnp_get_resource);



static struct pnp_resource *pnp_new_resource(struct pnp_dev *dev, int type)

{

	struct pnp_resource *pnp_res;

	int i;



	switch (type) {

	case IORESOURCE_IO:

		for (i = 0; i < PNP_MAX_PORT; i++) {

			pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_IO, i);

			if (pnp_res && !pnp_resource_valid(&pnp_res->res))

				return pnp_res;

		}

		break;

	case IORESOURCE_MEM:

		for (i = 0; i < PNP_MAX_MEM; i++) {

			pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_MEM, i);

			if (pnp_res && !pnp_resource_valid(&pnp_res->res))

				return pnp_res;

		}

		break;

	case IORESOURCE_IRQ:

		for (i = 0; i < PNP_MAX_IRQ; i++) {

			pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_IRQ, i);

			if (pnp_res && !pnp_resource_valid(&pnp_res->res))

				return pnp_res;

		}

		break;

	case IORESOURCE_DMA:

		for (i = 0; i < PNP_MAX_DMA; i++) {

			pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_DMA, i);

			if (pnp_res && !pnp_resource_valid(&pnp_res->res))

				return pnp_res;

		}

		break;

	}

	return NULL;

}



/* format is: pnp_reserve_irq=irq1[,irq2] .... */

static int __init pnp_setup_reserve_irq(char *str)

{

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