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authorShaohua Li <shaohua.li@intel.com>2008-08-28 10:05:45 +0800
committerLen Brown <len.brown@intel.com>2008-09-23 23:16:41 -0400
commitf730ae1838635a02aa60834762c61566911d004c (patch)
tree40318e97b65902a86e0b6eacac4bdaf7fd702fad /drivers/ata/libata-acpi.c
parent19cd847ab24fefe9e50101ec94479e0400a08650 (diff)
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>
Diffstat (limited to 'drivers/ata/libata-acpi.c')
-rw-r--r--drivers/ata/libata-acpi.c107
1 files changed, 14 insertions, 93 deletions
diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index 9330b7922f6..97727be7e15 100644
--- 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);