pnp: add PNP resource range checking function
Add a PNP resource range check function, indicating whether a resource
has been assigned to any device.
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
[apw@canonical.com: fixed up exports et al]
Signed-off-by: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
diff --git a/drivers/pnp/resource.c b/drivers/pnp/resource.c
index f604061..ba97654 100644
--- a/drivers/pnp/resource.c
+++ b/drivers/pnp/resource.c
@@ -638,6 +638,24 @@
}
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)
{