[patch 44/54] PNP: add pnp_new_resource() to find a new unset pnp_resource

Bjorn Helgaas
2008-04-25T18:40:31Z

[-- Attachment #1: pnp-add-pnp_new_resource --]
[-- Type: text/plain, Size: 1628 bytes --]

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 <bjorn.helgaas@hp.com>

Index: work10/drivers/pnp/resource.c
===================================================================
--- work10.orig/drivers/pnp/resource.c 2008-04-25 11:15:09.000000000 -0600
+++ work10/drivers/pnp/resource.c 2008-04-25 11:15:11.000000000 -0600
@@ -526,6 +526,49 @@
}
EXPORT_SYMBOL(pnp_get_resource);

+static struct pnp_resource *pnp_new_resource(struct pnp_dev *dev, int type)
+{
+ struct pnp_resource *pnp_res;
+ struct resource *res;
+ int i;
+
+ switch (type) {
+ case IORESOURCE_IO:
+ for (i = 0; i < PNP_MAX_PORT; i++) {
+ pnp_res = &dev->res->port[i];
+ res = &pnp_res->res;
+ if (res->flags & IORESOURCE_UNSET)
+ return pnp_res;
+ }
+ break;
+ case IORESOURCE_MEM:
+ for (i = 0; i < PNP_MAX_MEM; i++) {
+ pnp_res = &dev->res->mem[i];
+ res = &pnp_res->res;
+ if (res->flags & IORESOURCE_UNSET)
+ return pnp_res;
+ }
+ break;
+ case IORESOURCE_IRQ:
+ for (i = 0; i < PNP_MAX_IRQ; i++) {
+ pnp_res = &dev->res->irq[i];
+ res = &pnp_res->res;
+ if (res->flags & IORESOURCE_UNSET)
+ return pnp_res;
+ }
+ break;
+ case IORESOURCE_DMA:
+ for (i = 0; i < PNP_MAX_DMA; i++) {
+ pnp_res = &dev->res->dma[i];
+ res = &pnp_res->res;
+ if (res->flags & IORESOURCE_UNSET)
+ return pnp_res;
+ }
+ break;
+ }
+ return NULL;
+}
+
/* format is: pnp_reserve_irq=irq1[,irq2] .... */
static int __init pnp_setup_reserve_irq(char *str)
{

--