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x86/PCI: add host bridge resource release for _CRS path

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1. Allocate pci_root_info instead of using stack.  We need to pass around
   info for release function.
2. Add release_pci_root_info
3. Set x86 host bridge release function to make sure root bridge
   related resources get freed during root bus removal.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Yinghai Lu 2012-04-02 18:31:53 -07:00 committed by Bjorn Helgaas
parent 9a03d28d94
commit fd3b0c1ea4
1 changed files with 51 additions and 12 deletions
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63
arch/x86/pci/acpi.c
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@ -315,11 +315,40 @@ static void add_resources(struct pci_root_info *info,
}
}
static void free_pci_root_info(struct pci_root_info *info)
static void free_pci_root_info_res(struct pci_root_info *info)
{
kfree(info->name);
kfree(info->res);
memset(info, 0, sizeof(struct pci_root_info));
info->res = NULL;
info->res_num = 0;
}
static void __release_pci_root_info(struct pci_root_info *info)
{
int i;
struct resource *res;
for (i = 0; i < info->res_num; i++) {
res = &info->res[i];
if (!res->parent)
continue;
if (!(res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
continue;
release_resource(res);
}
free_pci_root_info_res(info);
kfree(info);
}
static void release_pci_root_info(struct pci_host_bridge *bridge)
{
struct pci_root_info *info = bridge->release_data;
__release_pci_root_info(info);
}
static void
@ -352,7 +381,7 @@ probe_pci_root_info(struct pci_root_info *info, struct acpi_device *device,
struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root)
{
struct acpi_device *device = root->device;
struct pci_root_info info;
struct pci_root_info *info = NULL;
int domain = root->segment;
int busnum = root->secondary.start;
LIST_HEAD(resources);
@ -397,7 +426,13 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root)
sd->domain = domain;
sd->node = node;
memset(&info, 0, sizeof(struct pci_root_info));
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (!info) {
kfree(sd);
printk(KERN_WARNING "pci_bus %04x:%02x: "
"ignored (out of memory)\n", domain, busnum);
return NULL;
}
/*
* Maybe the desired pci bus has been already scanned. In such case
* it is unnecessary to scan the pci bus with the given domain,busnum.
@ -409,29 +444,33 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root)
* be replaced by sd.
*/
memcpy(bus->sysdata, sd, sizeof(*sd));
kfree(info);
kfree(sd);
} else {
probe_pci_root_info(&info, device, busnum, domain);
probe_pci_root_info(info, device, busnum, domain);
/*
* _CRS with no apertures is normal, so only fall back to
* defaults or native bridge info if we're ignoring _CRS.
*/
if (pci_use_crs)
add_resources(&info, &resources);
add_resources(info, &resources);
else {
free_pci_root_info(&info);
free_pci_root_info_res(info);
x86_pci_root_bus_resources(busnum, &resources);
}
bus = pci_create_root_bus(NULL, busnum, &pci_root_ops, sd,
&resources);
if (bus)
if (bus) {
bus->subordinate = pci_scan_child_bus(bus);
else
pci_set_host_bridge_release(
to_pci_host_bridge(bus->bridge),
release_pci_root_info, info);
} else {
pci_free_resource_list(&resources);
if (!bus && pci_use_crs)
free_pci_root_info(&info);
__release_pci_root_info(info);
}
}
/* After the PCI-E bus has been walked and all devices discovered,