From a50b6d7b8d7e1a8b13bd1be65a865b115e1190d9 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Mon, 28 Apr 2008 16:34:33 -0600 Subject: 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: Bjorn Helgaas Signed-off-by: Len Brown --- drivers/pnp/resource.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) (limited to 'drivers') diff --git a/drivers/pnp/resource.c b/drivers/pnp/resource.c index c57cfe51d52..1f4134eea7b 100644 --- a/drivers/pnp/resource.c +++ b/drivers/pnp/resource.c @@ -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) { -- cgit