From: Bjorn Helgaas Date: Fri, 5 Jun 2009 14:37:23 +0000 (+0000) Subject: pnp: add PNP resource range checking function X-Git-Tag: tegra-9.12.13.ER~2623^2~30 X-Git-Url: https://nv-tegra.nvidia.com/r/gitweb?p=linux-2.6.git;a=commitdiff_plain;h=1b8e69662e1a086878bf930a6042daf7f8a076cc 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 [apw@canonical.com: fixed up exports et al] Signed-off-by: Andy Whitcroft Signed-off-by: Eric Anholt --- diff --git a/drivers/pnp/resource.c b/drivers/pnp/resource.c index f604061d2bb..ba976542788 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) { diff --git a/include/linux/pnp.h b/include/linux/pnp.h index ca3c8877302..b063c7328ba 100644 --- a/include/linux/pnp.h +++ b/include/linux/pnp.h @@ -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; }