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authorBjorn Helgaas <bjorn.helgaas at hp.com>2009-06-05 14:37:23 +0000
committerEric Anholt <eric@anholt.net>2009-06-05 14:37:41 +0000
commit1b8e69662e1a086878bf930a6042daf7f8a076cc (patch)
tree20b9559e2ac41189c5c72ee7fab19ea781d97e3e /drivers
parentb66d18ddb16603d1e1ec39cb2ff3abf3fd212180 (diff)
downloadop-kernel-dev-1b8e69662e1a086878bf930a6042daf7f8a076cc.zip
op-kernel-dev-1b8e69662e1a086878bf930a6042daf7f8a076cc.tar.gz
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/pnp/resource.c18
1 files changed, 18 insertions, 0 deletions
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 @@ 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)
{
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