[PATCH] libata: remove dead code from libata-acpi.c

[Liu Jiang <liuj97@gmail.com>]

From: Liu Jiang <liu97@gmail.com>

Commit 30dcf76acc69 "libata: migrate ACPI code over to new bindings"
removed ACPI dock notification related code, but there's some dead
code left, so clean up it.

Cc: Tejun Heo <tj@kernel.org>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Aaron Lu <aaron.lu@intel.com>
Cc: linux-ide@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Liu Jiang <jiang.liu@huawei.com>
---
 drivers/ata/libata-acpi.c | 123 ----------------------------------------------
 1 file changed, 123 deletions(-)

diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index 87f2f39..e50c987 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -91,129 +91,6 @@ acpi_handle ata_dev_acpi_handle(struct ata_device *dev)
 }
 EXPORT_SYMBOL(ata_dev_acpi_handle);
 
-/* @ap and @dev are the same as ata_acpi_handle_hotplug() */
-static void ata_acpi_detach_device(struct ata_port *ap, struct ata_device *dev)
-{
-	if (dev)
-		dev->flags |= ATA_DFLAG_DETACH;
-	else {
-		struct ata_link *tlink;
-		struct ata_device *tdev;
-
-		ata_for_each_link(tlink, ap, EDGE)
-			ata_for_each_dev(tdev, tlink, ALL)
-				tdev->flags |= ATA_DFLAG_DETACH;
-	}
-
-	ata_port_schedule_eh(ap);
-}
-
-/**
- * ata_acpi_handle_hotplug - ACPI event handler backend
- * @ap: ATA port ACPI event occurred
- * @dev: ATA device ACPI event occurred (can be NULL)
- * @event: ACPI event which occurred
- *
- * All ACPI bay / device realted events end up in this function.  If
- * the event is port-wide @dev is NULL.  If the event is specific to a
- * device, @dev points to it.
- *
- * Hotplug (as opposed to unplug) notification is always handled as
- * port-wide while unplug only kills the target device on device-wide
- * event.
- *
- * LOCKING:
- * ACPI notify handler context.  May sleep.
- */
-static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev,
-				    u32 event)
-{
-	struct ata_eh_info *ehi = &ap->link.eh_info;
-	int wait = 0;
-	unsigned long flags;
-
-	spin_lock_irqsave(ap->lock, flags);
-	/*
-	 * When dock driver calls into the routine, it will always use
-	 * ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and
-	 * ACPI_NOTIFY_EJECT_REQUEST for remove
-	 */
-	switch (event) {
-	case ACPI_NOTIFY_BUS_CHECK:
-	case ACPI_NOTIFY_DEVICE_CHECK:
-		ata_ehi_push_desc(ehi, "ACPI event");
-
-		ata_ehi_hotplugged(ehi);
-		ata_port_freeze(ap);
-		break;
-	case ACPI_NOTIFY_EJECT_REQUEST:
-		ata_ehi_push_desc(ehi, "ACPI event");
-
-		ata_acpi_detach_device(ap, dev);
-		wait = 1;
-		break;
-	}
-
-	spin_unlock_irqrestore(ap->lock, flags);
-
-	if (wait)
-		ata_port_wait_eh(ap);
-}
-
-static void ata_acpi_dev_notify_dock(acpi_handle handle, u32 event, void *data)
-{
-	struct ata_device *dev = data;
-
-	ata_acpi_handle_hotplug(dev->link->ap, dev, event);
-}
-
-static void ata_acpi_ap_notify_dock(acpi_handle handle, u32 event, void *data)
-{
-	struct ata_port *ap = data;
-
-	ata_acpi_handle_hotplug(ap, NULL, event);
-}
-
-static void ata_acpi_uevent(struct ata_port *ap, struct ata_device *dev,
-	u32 event)
-{
-	struct kobject *kobj = NULL;
-	char event_string[20];
-	char *envp[] = { event_string, NULL };
-
-	if (dev) {
-		if (dev->sdev)
-			kobj = &dev->sdev->sdev_gendev.kobj;
-	} else
-		kobj = &ap->dev->kobj;
-
-	if (kobj) {
-		snprintf(event_string, 20, "BAY_EVENT=%d", event);
-		kobject_uevent_env(kobj, KOBJ_CHANGE, envp);
-	}
-}
-
-static void ata_acpi_ap_uevent(acpi_handle handle, u32 event, void *data)
-{
-	ata_acpi_uevent(data, NULL, event);
-}
-
-static void ata_acpi_dev_uevent(acpi_handle handle, u32 event, void *data)
-{
-	struct ata_device *dev = data;
-	ata_acpi_uevent(dev->link->ap, dev, event);
-}
-
-static const struct acpi_dock_ops ata_acpi_dev_dock_ops = {
-	.handler = ata_acpi_dev_notify_dock,
-	.uevent = ata_acpi_dev_uevent,
-};
-
-static const struct acpi_dock_ops ata_acpi_ap_dock_ops = {
-	.handler = ata_acpi_ap_notify_dock,
-	.uevent = ata_acpi_ap_uevent,
-};
-
 /**
  * ata_acpi_dissociate - dissociate ATA host from ACPI objects
  * @host: target ATA host
-- 
1.8.1.2