diff options
| -rw-r--r-- | drivers/pci/hotplug/acpiphp_glue.c | 111 |
1 files changed, 109 insertions, 2 deletions
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c index 4e25d9c7cc395..fe0a6b7662f72 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); + } + } } } } |