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ACPI / glue: Drop .find_bridge() callback from struct acpi_bus_type

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After PCI and USB have stopped using the .find_bridge() callback in
struct acpi_bus_type, the only remaining user of it is SATA, but SATA
only pretends to be a user, because it points that callback to a stub
always returning -ENODEV.

For this reason, drop the SATA's dummy .find_bridge() callback and
remove .find_bridge(), which is not used any more, from struct
acpi_bus_type entirely.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Rafael J. Wysocki 2013-03-03 22:35:44 +01:00
parent 53540098b2
commit 924144818c
3 changed files with 1 additions and 34 deletions
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26
drivers/acpi/glue.c
View File

@ -78,22 +78,6 @@ static struct acpi_bus_type *acpi_get_bus_type(struct device *dev)
return ret;
}
static int acpi_find_bridge_device(struct device *dev, acpi_handle * handle)
{
struct acpi_bus_type *tmp;
int ret = -ENODEV;
down_read(&bus_type_sem);
list_for_each_entry(tmp, &bus_type_list, list) {
if (tmp->find_bridge && !tmp->find_bridge(dev, handle)) {
ret = 0;
break;
}
}
up_read(&bus_type_sem);
return ret;
}
static acpi_status do_acpi_find_child(acpi_handle handle, u32 lvl_not_used,
void *addr_p, void **ret_p)
{
@ -262,15 +246,7 @@ static int acpi_platform_notify(struct device *dev)
int ret;
ret = acpi_bind_one(dev, NULL);
if (ret) {
if (!type) {
ret = acpi_find_bridge_device(dev, &handle);
if (!ret)
ret = acpi_bind_one(dev, handle);
goto out;
}
if (ret && type) {
ret = type->find_device(dev, &handle);
if (ret) {
DBG("Unable to get handle for %s\n", dev_name(dev));

6
drivers/ata/libata-acpi.c
View File

@ -1144,14 +1144,8 @@ static int ata_acpi_find_device(struct device *dev, acpi_handle *handle)
return -ENODEV;
}
static int ata_acpi_find_dummy(struct device *dev, acpi_handle *handle)
{
return -ENODEV;
}
static struct acpi_bus_type ata_acpi_bus = {
.name = "ATA",
.find_bridge = ata_acpi_find_dummy,
.find_device = ata_acpi_find_device,
};

3
include/acpi/acpi_bus.h
View File

@ -439,10 +439,7 @@ struct acpi_bus_type {
struct list_head list;
const char *name;
bool (*match)(struct device *dev);
/* For general devices under the bus */
int (*find_device) (struct device *, acpi_handle *);
/* For bridges, such as PCI root bridge, IDE controller */
int (*find_bridge) (struct device *, acpi_handle *);
void (*setup)(struct device *);
void (*cleanup)(struct device *);
};