From muneda.takahiro@jp.fujitsu.com Tue Mar 21 21:49:23 2006 Date: Wed, 22 Mar 2006 14:49:09 +0900 Message-ID: <87lkv3c9m2.wl%muneda.takahiro@jp.fujitsu.com> From: MUNEDA Takahiro To: Greg KH Cc: MUNEDA Takahiro Subject: acpiphp: configure _PRT - V3 Current acpiphp does not free acpi_device structs when the PCI devices are removed. When the PCI device is added, acpi_bus_add() fails because acpi_device struct has already exists. So, _PRT method does not evaluate. This patch fixes this issue. Signed-off-by: MUNEDA Takahiro Signed-off-by: Greg Kroah-Hartman --- drivers/pci/hotplug/acpiphp_glue.c | 71 +++++++++++++++++-------------------- 1 file changed, 33 insertions(+), 38 deletions(-) --- gregkh-2.6.orig/drivers/pci/hotplug/acpiphp_glue.c +++ gregkh-2.6/drivers/pci/hotplug/acpiphp_glue.c @@ -797,36 +797,6 @@ static unsigned char acpiphp_max_busnr(s } - -/** - * 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 @@ -872,6 +842,28 @@ acpiphp_bus_add_out: } +/** + * acpiphp_bus_trim - trim a bus from acpi subsystem + * @handle: handle to acpi namespace + * + */ +int acpiphp_bus_trim(acpi_handle handle) +{ + struct acpi_device *device; + int retval; + + retval = acpi_bus_get_device(handle, &device); + if (retval) { + dbg("acpi_device not found\n"); + return retval; + } + + retval = acpi_bus_trim(device, 1); + if (retval) + err("cannot remove from acpi list\n"); + + return retval; +} /** * enable_device - enable, configure a slot @@ -918,19 +910,17 @@ static int enable_device(struct acpiphp_ 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); - } - } } } } + list_for_each (l, &slot->funcs) { + func = list_entry(l, struct acpiphp_func, sibling); + acpiphp_bus_add(func); + } + pci_bus_assign_resources(bus); acpiphp_sanitize_bus(bus); pci_enable_bridges(bus); @@ -967,6 +957,11 @@ static int disable_device(struct acpiphp list_for_each (l, &slot->funcs) { func = list_entry(l, struct acpiphp_func, sibling); + + acpiphp_bus_trim(func->handle); + /* try to remove anyway. + * acpiphp_bus_add might have been failed */ + if (!func->pci_dev) continue;