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pnp: add PNP resource range checking function

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Add a PNP resource range check function, indicating whether a resource
has been assigned to any device.

Signed-off-by: Bjorn Helgaas <[email protected]>
[[email protected]: fixed up exports et al]
Signed-off-by: Andy Whitcroft <[email protected]>
Signed-off-by: Eric Anholt <[email protected]>
This commit is contained in:
Bjorn Helgaas 2009-06-05 14:37:23 +00:00 • committed by Eric Anholt
commit 1b8e69662e
2 changed files with 20 additions and 0 deletions
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18
drivers/pnp/resource.c
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@ -638,6 +638,24 @@ int pnp_possible_config(struct pnp_dev *dev, int type, resource_size_t start,
}
EXPORT_SYMBOL(pnp_possible_config);
int pnp_range_reserved(resource_size_t start, resource_size_t end)
{
struct pnp_dev *dev;
struct pnp_resource *pnp_res;
resource_size_t *dev_start, *dev_end;
pnp_for_each_dev(dev) {
list_for_each_entry(pnp_res, &dev->resources, list) {
dev_start = &pnp_res->res.start;
dev_end = &pnp_res->res.end;
if (ranged_conflict(&start, &end, dev_start, dev_end))
return 1;
}
}
return 0;
}
EXPORT_SYMBOL(pnp_range_reserved);
/* format is: pnp_reserve_irq=irq1[,irq2] .... */
static int __init pnp_setup_reserve_irq(char *str)
{