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Subject[PATCH] PCI hotplug changes for 2.5.58
ChangeSet 1.1025, 2003/01/14 11:30:32-08:00, willy@debian.org

[PATCH] acpi_bus_register_driver patch

The current ACPI code searches for a _HID of PNP0A03. This is wrong,
it needs to check _CID too. But we already have generic code for doing
that, so this patch converts the ACPI pcihp code to do this.


diff -Nru a/drivers/hotplug/acpiphp_glue.c b/drivers/hotplug/acpiphp_glue.c
--- a/drivers/hotplug/acpiphp_glue.c Tue Jan 14 14:11:54 2003
+++ b/drivers/hotplug/acpiphp_glue.c Tue Jan 14 14:11:54 2003
@@ -712,8 +712,9 @@


/* find hot-pluggable slots, and then find P2P bridge */
-static int add_bridges (acpi_handle *handle)
+static int add_bridges(struct acpi_device *device)
{
+ acpi_handle *handle = device->handle;
acpi_status status;
unsigned long tmp;
int seg, bus;
@@ -767,36 +768,6 @@
}


-/* callback routine to enumerate all the bridges in ACPI namespace */
-static acpi_status
-find_host_bridge (acpi_handle handle, u32 lvl, void *context, void **rv)
-{
- acpi_status status;
- struct acpi_device_info info;
- char objname[5];
- struct acpi_buffer buffer = { .length = sizeof(objname),
- .pointer = objname };
-
- status = acpi_get_object_info(handle, &info);
- if (ACPI_FAILURE(status)) {
- dbg("%s: failed to get bridge information\n", __FUNCTION__);
- return AE_OK; /* continue */
- }
-
- info.hardware_id[sizeof(info.hardware_id)-1] = '\0';
-
- /* TBD use acpi_get_devices() API */
- if (info.current_status &&
- (info.valid & ACPI_VALID_HID) &&
- strcmp(info.hardware_id, ACPI_PCI_HOST_HID) == 0) {
- acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer);
- dbg("checking PCI-hotplug capable bridges under [%s]\n", objname);
- add_bridges(handle);
- }
- return AE_OK;
-}
-
-
static int power_on_slot (struct acpiphp_slot *slot)
{
acpi_status status;
@@ -1157,6 +1128,14 @@
}
}

+static struct acpi_driver acpi_pci_hp_driver = {
+ .name = "pci_hp",
+ .class = "",
+ .ids = ACPI_PCI_HOST_HID,
+ .ops = {
+ .add = add_bridges,
+ }
+};

/**
* acpiphp_glue_init - initializes all PCI hotplug - ACPI glue data structures
@@ -1169,9 +1148,7 @@
if (list_empty(&pci_root_buses))
return -1;

- status = acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
- ACPI_UINT32_MAX, find_host_bridge,
- NULL, NULL);
+ status = acpi_bus_register_driver(&acpi_pci_hp_driver);

if (ACPI_FAILURE(status)) {
err("%s: acpi_walk_namespace() failed\n", __FUNCTION__);
-
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