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PCI/ACPI: Pass acpi_pci_root to acpi_pci_drivers' add/remove interface

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This patch changes .add/.remove interfaces of acpi_pci_driver.
In the current implementation acpi_handle is passed as a parameter
of .add/.remove interface.  However, the acpi_pci_root structure
contains more useful information than just the acpi_handle.  This
enables us to avoid some useless lookups in each acpi_pci_driver.

Note: This changes interfaces used by acpi_pci_register_driver(), an
exported symbol.  This patch updates all the in-kernel users, but any
out-of-kernel acpi_pci_register_driver() users will need updates.

[bhelgaas: changelog]
Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Taku Izumi 2012-09-18 15:22:35 +09:00 committed by Bjorn Helgaas
parent d0020f6522
commit 55bfe3c0c5
4 changed files with 19 additions and 16 deletions
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8
drivers/acpi/pci_root.c
View file

@ -87,7 +87,7 @@ int acpi_pci_register_driver(struct acpi_pci_driver *driver)
list_add_tail(&driver->node, &acpi_pci_drivers);
if (driver->add)
list_for_each_entry(root, &acpi_pci_roots, node) {
driver->add(root->device->handle);
driver->add(root);
n++;
}
mutex_unlock(&acpi_pci_root_lock);
@ -104,7 +104,7 @@ void acpi_pci_unregister_driver(struct acpi_pci_driver *driver)
list_del(&driver->node);
if (driver->remove)
list_for_each_entry(root, &acpi_pci_roots, node)
driver->remove(root->device->handle);
driver->remove(root);
mutex_unlock(&acpi_pci_root_lock);
}
EXPORT_SYMBOL(acpi_pci_unregister_driver);
@ -629,7 +629,7 @@ static int acpi_pci_root_start(struct acpi_device *device)
mutex_lock(&acpi_pci_root_lock);
list_for_each_entry(driver, &acpi_pci_drivers, node)
if (driver->add)
driver->add(device->handle);
driver->add(root);
mutex_unlock(&acpi_pci_root_lock);
pci_bus_add_devices(root->bus);
@ -645,7 +645,7 @@ static int acpi_pci_root_remove(struct acpi_device *device, int type)
mutex_lock(&acpi_pci_root_lock);
list_for_each_entry(driver, &acpi_pci_drivers, node)
if (driver->remove)
driver->remove(root->device->handle);
driver->remove(root);
mutex_unlock(&acpi_pci_root_lock);
device_set_run_wake(root->bus->bridge, false);

11
drivers/acpi/pci_slot.c
View file

@ -67,8 +67,8 @@ struct acpi_pci_slot {
struct list_head list; /* node in the list of slots */
};
static int acpi_pci_slot_add(acpi_handle handle);
static void acpi_pci_slot_remove(acpi_handle handle);
static int acpi_pci_slot_add(struct acpi_pci_root *root);
static void acpi_pci_slot_remove(struct acpi_pci_root *root);
static LIST_HEAD(slot_list);
static DEFINE_MUTEX(slot_list_lock);
@ -295,11 +295,11 @@ walk_root_bridge(acpi_handle handle, acpi_walk_callback user_function)
* @handle: points to an acpi_pci_root
*/
static int
acpi_pci_slot_add(acpi_handle handle)
acpi_pci_slot_add(struct acpi_pci_root *root)
{
acpi_status status;
status = walk_root_bridge(handle, register_slot);
status = walk_root_bridge(root->device->handle, register_slot);
if (ACPI_FAILURE(status))
err("%s: register_slot failure - %d\n", __func__, status);
@ -311,10 +311,11 @@ acpi_pci_slot_add(acpi_handle handle)
* @handle: points to an acpi_pci_root
*/
static void
acpi_pci_slot_remove(acpi_handle handle)
acpi_pci_slot_remove(struct acpi_pci_root *root)
{
struct acpi_pci_slot *slot, *tmp;
struct pci_bus *pbus;
acpi_handle handle = root->device->handle;
mutex_lock(&slot_list_lock);
list_for_each_entry_safe(slot, tmp, &slot_list, list) {

12
drivers/pci/hotplug/acpiphp_glue.c
View file

@ -382,10 +382,10 @@ static inline void config_p2p_bridge_flags(struct acpiphp_bridge *bridge)
/* allocate and initialize host bridge data structure */
static void add_host_bridge(acpi_handle *handle)
static void add_host_bridge(struct acpi_pci_root *root)
{
struct acpiphp_bridge *bridge;
struct acpi_pci_root *root = acpi_pci_find_root(handle);
acpi_handle handle = root->device->handle;
bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL);
if (bridge == NULL)
@ -468,11 +468,12 @@ find_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv)
/* find hot-pluggable slots, and then find P2P bridge */
static int add_bridge(acpi_handle handle)
static int add_bridge(struct acpi_pci_root *root)
{
acpi_status status;
unsigned long long tmp;
acpi_handle dummy_handle;
acpi_handle handle = root->device->handle;
/* if the bridge doesn't have _STA, we assume it is always there */
status = acpi_get_handle(handle, "_STA", &dummy_handle);
@ -490,7 +491,7 @@ static int add_bridge(acpi_handle handle)
/* check if this bridge has ejectable slots */
if (detect_ejectable_slots(handle) > 0) {
dbg("found PCI host-bus bridge with hot-pluggable slots\n");
add_host_bridge(handle);
add_host_bridge(root);
}
/* search P2P bridges under this host bridge */
@ -588,9 +589,10 @@ cleanup_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv)
return AE_OK;
}
static void remove_bridge(acpi_handle handle)
static void remove_bridge(struct acpi_pci_root *root)
{
struct acpiphp_bridge *bridge;
acpi_handle handle = root->device->handle;
/* cleanup p2p bridges under this host bridge
in a depth-first manner */

4
include/linux/acpi.h
View file

@ -139,8 +139,8 @@ void acpi_pci_irq_disable (struct pci_dev *dev);
struct acpi_pci_driver {
struct list_head node;
int (*add)(acpi_handle handle);
void (*remove)(acpi_handle handle);
int (*add)(struct acpi_pci_root *root);
void (*remove)(struct acpi_pci_root *root);
};
int acpi_pci_register_driver(struct acpi_pci_driver *driver);