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 <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
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1 changed files with 38 additions and 0 deletions
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@ -538,6 +538,44 @@ struct resource *pnp_get_resource(struct pnp_dev *dev,
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}
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EXPORT_SYMBOL(pnp_get_resource);
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static struct pnp_resource *pnp_new_resource(struct pnp_dev *dev, int type)
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{
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struct pnp_resource *pnp_res;
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int i;
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switch (type) {
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case IORESOURCE_IO:
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for (i = 0; i < PNP_MAX_PORT; i++) {
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pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_IO, i);
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if (pnp_res && !pnp_resource_valid(&pnp_res->res))
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return pnp_res;
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}
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break;
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case IORESOURCE_MEM:
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for (i = 0; i < PNP_MAX_MEM; i++) {
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pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_MEM, i);
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if (pnp_res && !pnp_resource_valid(&pnp_res->res))
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return pnp_res;
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}
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break;
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case IORESOURCE_IRQ:
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for (i = 0; i < PNP_MAX_IRQ; i++) {
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pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_IRQ, i);
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if (pnp_res && !pnp_resource_valid(&pnp_res->res))
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return pnp_res;
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}
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break;
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case IORESOURCE_DMA:
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for (i = 0; i < PNP_MAX_DMA; i++) {
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pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_DMA, i);
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if (pnp_res && !pnp_resource_valid(&pnp_res->res))
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return pnp_res;
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}
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break;
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}
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return NULL;
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}
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/* format is: pnp_reserve_irq=irq1[,irq2] .... */
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static int __init pnp_setup_reserve_irq(char *str)
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{
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