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| author | Bjorn Helgaas <bjorn.helgaas at hp.com> | 2009-06-05 16:37:23 +0200 |
|---|---|---|
| committer | Eric Anholt <eric@anholt.net> | 2009-06-05 16:37:41 +0200 |
| commit | 1b8e69662e1a086878bf930a6042daf7f8a076cc (patch) | |
| tree | 20b9559e2ac41189c5c72ee7fab19ea781d97e3e /drivers/pnp/resource.c | |
| parent | drm/i915: avoid non-atomic sysrq execution (diff) | |
| download | linux-1b8e69662e1a086878bf930a6042daf7f8a076cc.tar.xz linux-1b8e69662e1a086878bf930a6042daf7f8a076cc.zip | |
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/pnp/resource.c')
| -rw-r--r-- | drivers/pnp/resource.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/pnp/resource.c b/drivers/pnp/resource.c index f604061d2bb0..ba9765427886 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) { |