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

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>

3 files changed, 1 insertions, 34 deletions

diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c
index b94d14721af3..40a84cc6740c 100644
--- a/drivers/acpi/glue.c
+++ b/drivers/acpi/glue.c
@@ -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));
diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index c832a5ca09ad..beea3115577e 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -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,
 };
 
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index c751d7de3a5f..22ba56e834e2 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -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 *);
 };