From 45ca9e9730c5acdb482dd95799fd8ac834481897 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Fri, 28 Oct 2011 16:25:35 -0600 Subject: PCI: add helpers for building PCI bus resource lists We'd like to supply a list of resources when we create a new PCI bus, e.g., the root bus under a PCI host bridge. These are helpers for constructing that list. These are exported because the plan is to replace this exported interface: pci_scan_bus_parented() with this one: pci_add_resource(resources, ...) pci_scan_root_bus(..., resources) Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes --- drivers/pci/bus.c | 32 +++++++++++++++++++++++++++----- 1 file changed, 27 insertions(+), 5 deletions(-) (limited to 'drivers/pci/bus.c') diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c index 1e2ad92..398f5d8 100644 --- a/drivers/pci/bus.c +++ b/drivers/pci/bus.c @@ -18,6 +18,32 @@ #include "pci.h" +void pci_add_resource(struct list_head *resources, struct resource *res) +{ + struct pci_bus_resource *bus_res; + + bus_res = kzalloc(sizeof(struct pci_bus_resource), GFP_KERNEL); + if (!bus_res) { + printk(KERN_ERR "PCI: can't add bus resource %pR\n", res); + return; + } + + bus_res->res = res; + list_add_tail(&bus_res->list, resources); +} +EXPORT_SYMBOL(pci_add_resource); + +void pci_free_resource_list(struct list_head *resources) +{ + struct pci_bus_resource *bus_res, *tmp; + + list_for_each_entry_safe(bus_res, tmp, resources, list) { + list_del(&bus_res->list); + kfree(bus_res); + } +} +EXPORT_SYMBOL(pci_free_resource_list); + void pci_bus_add_resource(struct pci_bus *bus, struct resource *res, unsigned int flags) { @@ -52,16 +78,12 @@ EXPORT_SYMBOL_GPL(pci_bus_resource_n); void pci_bus_remove_resources(struct pci_bus *bus) { - struct pci_bus_resource *bus_res, *tmp; int i; for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; i++) bus->resource[i] = NULL; - list_for_each_entry_safe(bus_res, tmp, &bus->resources, list) { - list_del(&bus_res->list); - kfree(bus_res); - } + pci_free_resource_list(&bus->resources); } /** -- cgit v1.1