PCI/ACPI: Remove support of ACPI PCI subdrivers

Both sub-drivers of the "PCI Root Bridge ("pci_bridge")" driver, "acpiphp"
and "pci_slot", have been converted to hook directly into the PCI core.

With the conversions there are no remaining usages of the 'struct
acpi_pci_driver' list based infrastructure.  This patch removes it.

Signed-off-by: Myron Stowe <myron.stowe@redhat.com>
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Yinghai Lu <yinghai@kernel.org>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Cc: Toshi Kani <toshi.kani@hp.com>

2 files changed, 1 insertions, 56 deletions

diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 0ac546d5e53f..b80e06e0b2d9 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -65,44 +65,12 @@ static struct acpi_scan_handler pci_root_handler = {
         .detach = acpi_pci_root_remove,
 };
 
-/* Lock to protect both acpi_pci_roots and acpi_pci_drivers lists */
+/* Lock to protect both acpi_pci_roots lists */
 static DEFINE_MUTEX(acpi_pci_root_lock);
 static LIST_HEAD(acpi_pci_roots);
-static LIST_HEAD(acpi_pci_drivers);
 
 static DEFINE_MUTEX(osc_lock);
 
-int acpi_pci_register_driver(struct acpi_pci_driver *driver)
-{
-        int n = 0;
-        struct acpi_pci_root *root;
-
-        mutex_lock(&acpi_pci_root_lock);
-        list_add_tail(&driver->node, &acpi_pci_drivers);
-        if (driver->add)
-                list_for_each_entry(root, &acpi_pci_roots, node) {
-                        driver->add(root);
-                        n++;
-                }
-        mutex_unlock(&acpi_pci_root_lock);
-
-        return n;
-}
-EXPORT_SYMBOL(acpi_pci_register_driver);
-
-void acpi_pci_unregister_driver(struct acpi_pci_driver *driver)
-{
-        struct acpi_pci_root *root;
-
-        mutex_lock(&acpi_pci_root_lock);
-        list_del(&driver->node);
-        if (driver->remove)
-                list_for_each_entry(root, &acpi_pci_roots, node)
-                        driver->remove(root);
-        mutex_unlock(&acpi_pci_root_lock);
-}
-EXPORT_SYMBOL(acpi_pci_unregister_driver);
-
 /**
  * acpi_is_root_bridge - determine whether an ACPI CA node is a PCI root bridge
  * @handle - the ACPI CA node in question.
@@ -413,7 +381,6 @@ static int acpi_pci_root_add(struct acpi_device *device,
         acpi_status status;
         int result;
         struct acpi_pci_root *root;
-        struct acpi_pci_driver *driver;
         u32 flags, base_flags;
         bool is_osc_granted = false;
 
@@ -573,12 +540,6 @@ static int acpi_pci_root_add(struct acpi_device *device,
                 pci_assign_unassigned_bus_resources(root->bus);
         }
 
-        mutex_lock(&acpi_pci_root_lock);
-        list_for_each_entry(driver, &acpi_pci_drivers, node)
-                if (driver->add)
-                        driver->add(root);
-        mutex_unlock(&acpi_pci_root_lock);
-
         /* need to after hot-added ioapic is registered */
         if (system_state != SYSTEM_BOOTING)
                 pci_enable_bridges(root->bus);
@@ -599,16 +560,9 @@ end:
 static void acpi_pci_root_remove(struct acpi_device *device)
 {
         struct acpi_pci_root *root = acpi_driver_data(device);
-        struct acpi_pci_driver *driver;
 
         pci_stop_root_bus(root->bus);
 
-        mutex_lock(&acpi_pci_root_lock);
-        list_for_each_entry_reverse(driver, &acpi_pci_drivers, node)
-                if (driver->remove)
-                        driver->remove(root);
-        mutex_unlock(&acpi_pci_root_lock);
-
         device_set_run_wake(root->bus->bridge, false);
         pci_acpi_remove_bus_pm_notifier(device);
 
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index bcbdd7484e58..03053aca5b32 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -152,15 +152,6 @@ void acpi_penalize_isa_irq(int irq, int active);
 
 void acpi_pci_irq_disable (struct pci_dev *dev);
 
-struct acpi_pci_driver {
-        struct list_head node;
-        int (*add)(struct acpi_pci_root *root);
-        void (*remove)(struct acpi_pci_root *root);
-};
-
-int acpi_pci_register_driver(struct acpi_pci_driver *driver);
-void acpi_pci_unregister_driver(struct acpi_pci_driver *driver);
-
 extern int ec_read(u8 addr, u8 *val);
 extern int ec_write(u8 addr, u8 val);
 extern int ec_transaction(u8 command,