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path: root/drivers/pci/hotplug/acpiphp_glue.c
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Diffstat (limited to 'drivers/pci/hotplug/acpiphp_glue.c')
-rw-r--r--drivers/pci/hotplug/acpiphp_glue.c111
1 files changed, 109 insertions, 2 deletions
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index 4e25d9c..fe0a6b7 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -751,6 +751,106 @@ static int power_off_slot(struct acpiphp_slot *slot)
}
+
+/**
+ * acpiphp_max_busnr - return the highest reserved bus number under
+ * the given bus.
+ * @bus: bus to start search with
+ *
+ */
+static unsigned char acpiphp_max_busnr(struct pci_bus *bus)
+{
+ struct list_head *tmp;
+ unsigned char max, n;
+
+ /*
+ * pci_bus_max_busnr will return the highest
+ * reserved busnr for all these children.
+ * that is equivalent to the bus->subordinate
+ * value. We don't want to use the parent's
+ * bus->subordinate value because it could have
+ * padding in it.
+ */
+ max = bus->secondary;
+
+ list_for_each(tmp, &bus->children) {
+ n = pci_bus_max_busnr(pci_bus_b(tmp));
+ if (n > max)
+ max = n;
+ }
+ return max;
+}
+
+
+
+/**
+ * get_func - get a pointer to acpiphp_func given a slot, device
+ * @slot: slot to search
+ * @dev: pci_dev struct to match.
+ *
+ * This function will increase the reference count of pci_dev,
+ * so callers should call pci_dev_put when complete.
+ *
+ */
+static struct acpiphp_func *
+get_func(struct acpiphp_slot *slot, struct pci_dev *dev)
+{
+ struct acpiphp_func *func = NULL;
+ struct pci_bus *bus = slot->bridge->pci_bus;
+ struct pci_dev *pdev;
+
+ list_for_each_entry(func, &slot->funcs, sibling) {
+ pdev = pci_get_slot(bus, PCI_DEVFN(slot->device,
+ func->function));
+ if (pdev) {
+ if (pdev == dev)
+ break;
+ pci_dev_put(pdev);
+ }
+ }
+ return func;
+}
+
+
+/**
+ * acpiphp_bus_add - add a new bus to acpi subsystem
+ * @func: acpiphp_func of the bridge
+ *
+ */
+static int acpiphp_bus_add(struct acpiphp_func *func)
+{
+ acpi_handle phandle;
+ struct acpi_device *device, *pdevice;
+ int ret_val;
+
+ acpi_get_parent(func->handle, &phandle);
+ if (acpi_bus_get_device(phandle, &pdevice)) {
+ dbg("no parent device, assuming NULL\n");
+ pdevice = NULL;
+ }
+ if (acpi_bus_get_device(func->handle, &device)) {
+ ret_val = acpi_bus_add(&device, pdevice, func->handle,
+ ACPI_BUS_TYPE_DEVICE);
+ if (ret_val) {
+ dbg("error adding bus, %x\n",
+ -ret_val);
+ goto acpiphp_bus_add_out;
+ }
+ }
+ /*
+ * try to start anyway. We could have failed to add
+ * simply because this bus had previously been added
+ * on another add. Don't bother with the return value
+ * we just keep going.
+ */
+ ret_val = acpi_bus_start(device);
+
+acpiphp_bus_add_out:
+ return ret_val;
+}
+
+
+
/**
* enable_device - enable, configure a slot
* @slot: slot to be enabled
@@ -788,7 +888,7 @@ static int enable_device(struct acpiphp_slot *slot)
goto err_exit;
}
- max = bus->secondary;
+ max = acpiphp_max_busnr(bus);
for (pass = 0; pass < 2; pass++) {
list_for_each_entry(dev, &bus->devices, bus_list) {
if (PCI_SLOT(dev->devfn) != slot->device)
@@ -796,8 +896,15 @@ static int enable_device(struct acpiphp_slot *slot)
if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) {
max = pci_scan_bridge(bus, dev, max, pass);
- if (pass && dev->subordinate)
+ if (pass && dev->subordinate) {
pci_bus_size_bridges(dev->subordinate);
+ func = get_func(slot, dev);
+ if (func) {
+ acpiphp_bus_add(func);
+ /* side effect of get_func */
+ pci_dev_put(dev);
+ }
+ }
}
}
}