Commit 1b8e6966 authored by Bjorn Helgaas's avatar Bjorn Helgaas Committed by Eric Anholt
Browse files

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: default avatarBjorn Helgaas <bjorn.helgaas@hp.com>
[apw@canonical.com: fixed up exports et al]
Signed-off-by: default avatarAndy Whitcroft <apw@canonical.com>
Signed-off-by: default avatarEric Anholt <eric@anholt.net>
parent b66d18dd
......@@ -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)
{
......
......@@ -446,6 +446,7 @@ int pnp_start_dev(struct pnp_dev *dev);
int pnp_stop_dev(struct pnp_dev *dev);
int pnp_activate_dev(struct pnp_dev *dev);
int pnp_disable_dev(struct pnp_dev *dev);
int pnp_range_reserved(resource_size_t start, resource_size_t end);
/* protocol helpers */
int pnp_is_active(struct pnp_dev *dev);
......@@ -476,6 +477,7 @@ static inline int pnp_start_dev(struct pnp_dev *dev) { return -ENODEV; }
static inline int pnp_stop_dev(struct pnp_dev *dev) { return -ENODEV; }
static inline int pnp_activate_dev(struct pnp_dev *dev) { return -ENODEV; }
static inline int pnp_disable_dev(struct pnp_dev *dev) { return -ENODEV; }
static inline int pnp_range_reserved(resource_size_t start, resource_size_t end) { return 0;}
/* protocol helpers */
static inline int pnp_is_active(struct pnp_dev *dev) { return 0; }
......
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