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authorYinghai Lu <yinghai@kernel.org>2012-04-02 18:31:53 -0700
committerBjorn Helgaas <bhelgaas@google.com>2012-04-30 14:52:43 -0600
commitfd3b0c1ea482e863d6a2556b6686e35bec7a4f1c (patch)
tree645d20726707748daec683723c7fb81477a3beb6 /arch/x86/pci/acpi.c
parent9a03d28d9490b5a04f8b1d98fc08067c6f4f6189 (diff)
x86/PCI: add host bridge resource release for _CRS path
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>
Diffstat (limited to 'arch/x86/pci/acpi.c')
-rw-r--r--arch/x86/pci/acpi.c63
1 files changed, 51 insertions, 12 deletions
diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index a858c1d9af53..2b74a161d215 100644
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -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,