libata: remove functions now handed by ACPI dock driver

dock driver can handle ata(bay) hotplug now. dock driver already handles
_EJ0 and _STA, so remove them. Also libata doesn't need register
notification handler anymore.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Acked-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>

diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
index 4b395b1..f19f643 100644 (file)
--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -738,7 +738,8 @@ static void dock_notify(acpi_handle handle, u32 event, void *data)
                /* Fall back */
        case ACPI_NOTIFY_EJECT_REQUEST:
                begin_undock(ds);
-               if (immediate_undock || surprise_removal)
+               if ((immediate_undock && !(ds->flags & DOCK_IS_ATA))
+                  || surprise_removal)
                        handle_eject_request(ds, event);
                else
                        dock_event(ds, event, UNDOCK_EVENT);

diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index 9330b79..97727be 100644 (file)
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -120,21 +120,6 @@ static void ata_acpi_associate_ide_port(struct ata_port *ap)
                ap->pflags |= ATA_PFLAG_INIT_GTM_VALID;
 }
 
-static void ata_acpi_eject_device(acpi_handle handle)
-{
-       struct acpi_object_list arg_list;
-       union acpi_object arg;
-
-       arg_list.count = 1;
-       arg_list.pointer = &arg;
-       arg.type = ACPI_TYPE_INTEGER;
-       arg.integer.value = 1;
-
-       if (ACPI_FAILURE(acpi_evaluate_object(handle, "_EJ0",
-                                             &arg_list, NULL)))
-               printk(KERN_ERR "Failed to evaluate _EJ0!\n");
-}
-
 /* @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)
 {
@@ -157,7 +142,6 @@ static void ata_acpi_detach_device(struct ata_port *ap, struct ata_device *dev)
  * @ap: ATA port ACPI event occurred
  * @dev: ATA device ACPI event occurred (can be NULL)
  * @event: ACPI event which occurred
- * @is_dock_event: boolean indicating whether the event was a dock one
  *
  * 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
@@ -171,115 +155,58 @@ static void ata_acpi_detach_device(struct ata_port *ap, struct ata_device *dev)
  * ACPI notify handler context.  May sleep.
  */
 static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev,
-                                   u32 event, int is_dock_event)
+                                   u32 event)
 {
-       char event_string[12];
-       char *envp[] = { event_string, NULL };
        struct ata_eh_info *ehi = &ap->link.eh_info;
-       struct kobject *kobj = NULL;
        int wait = 0;
        unsigned long flags;
-       acpi_handle handle, tmphandle;
-       unsigned long sta;
-       acpi_status status;
+       acpi_handle handle;
 
-       if (dev) {
-               if (dev->sdev)
-                       kobj = &dev->sdev->sdev_gendev.kobj;
+       if (dev)
                handle = dev->acpi_handle;
-       } else {
-               kobj = &ap->dev->kobj;
+       else
                handle = ap->acpi_handle;
-       }
-
-       status = acpi_get_handle(handle, "_EJ0", &tmphandle);
-       if (ACPI_FAILURE(status))
-               /* This device does not support hotplug */
-               return;
-
-       if (event == ACPI_NOTIFY_BUS_CHECK ||
-           event == ACPI_NOTIFY_DEVICE_CHECK)
-               status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
 
        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");
 
-               if (ACPI_FAILURE(status)) {
-                       ata_port_printk(ap, KERN_ERR,
-                               "acpi: failed to determine bay status (0x%x)\n",
-                               status);
-                       break;
-               }
-
-               if (sta) {
-                       ata_ehi_hotplugged(ehi);
-                       ata_port_freeze(ap);
-               } else {
-                       /* The device has gone - unplug it */
-                       ata_acpi_detach_device(ap, dev);
-                       wait = 1;
-               }
+               ata_ehi_hotplugged(ehi);
+               ata_port_freeze(ap);
                break;
        case ACPI_NOTIFY_EJECT_REQUEST:
                ata_ehi_push_desc(ehi, "ACPI event");
 
-               if (!is_dock_event)
-                       break;
-
-               /* undock event - immediate unplug */
                ata_acpi_detach_device(ap, dev);
                wait = 1;
                break;
        }
 
-       /* make sure kobj doesn't go away while ap->lock is released */
-       kobject_get(kobj);
-
        spin_unlock_irqrestore(ap->lock, flags);
 
-       if (wait) {
+       if (wait)
                ata_port_wait_eh(ap);
-               ata_acpi_eject_device(handle);
-       }
-
-       if (kobj && !is_dock_event) {
-               sprintf(event_string, "BAY_EVENT=%d", event);
-               kobject_uevent_env(kobj, KOBJ_CHANGE, envp);
-       }
-
-       kobject_put(kobj);
 }
 
 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, 1);
+       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, 1);
-}
-
-static void ata_acpi_dev_notify(acpi_handle handle, u32 event, void *data)
-{
-       struct ata_device *dev = data;
-
-       ata_acpi_handle_hotplug(dev->link->ap, dev, event, 0);
-}
-
-static void ata_acpi_ap_notify(acpi_handle handle, u32 event, void *data)
-{
-       struct ata_port *ap = data;
-
-       ata_acpi_handle_hotplug(ap, NULL, event, 0);
+       ata_acpi_handle_hotplug(ap, NULL, event);
 }
 
 /**
@@ -315,9 +242,6 @@ void ata_acpi_associate(struct ata_host *host)
                        ata_acpi_associate_ide_port(ap);
 
                if (ap->acpi_handle) {
-                       acpi_install_notify_handler(ap->acpi_handle,
-                                                   ACPI_SYSTEM_NOTIFY,
-                                                   ata_acpi_ap_notify, ap);
                        /* we might be on a docking station */
                        register_hotplug_dock_device(ap->acpi_handle,
                                             ata_acpi_ap_notify_dock, ap);
@@ -327,9 +251,6 @@ void ata_acpi_associate(struct ata_host *host)
                        struct ata_device *dev = &ap->link.device[j];
 
                        if (dev->acpi_handle) {
-                               acpi_install_notify_handler(dev->acpi_handle,
-                                               ACPI_SYSTEM_NOTIFY,
-                                               ata_acpi_dev_notify, dev);
                                /* we might be on a docking station */
                                register_hotplug_dock_device(dev->acpi_handle,
                                             ata_acpi_dev_notify_dock, dev);