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path: root/drivers/acpi/dock.c
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Diffstat (limited to 'drivers/acpi/dock.c')
-rw-r--r--drivers/acpi/dock.c261
1 files changed, 91 insertions, 170 deletions
diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
index 30be3c148f7e..bbc2c1315c47 100644
--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -50,7 +50,6 @@ MODULE_PARM_DESC(immediate_undock, "1 (default) will cause the driver to "
 	" before undocking");
 
 static struct atomic_notifier_head dock_notifier_list;
-static char dock_device_name[] = "dock";
 
 static const struct acpi_device_id dock_device_ids[] = {
 	{"LNXDOCK", 0},
@@ -93,40 +92,30 @@ struct dock_dependent_device {
  *                         Dock Dependent device functions                   *
  *****************************************************************************/
 /**
- *  alloc_dock_dependent_device - allocate and init a dependent device
- *  @handle: the acpi_handle of the dependent device
+ * add_dock_dependent_device - associate a device with the dock station
+ * @ds: The dock station
+ * @handle: handle of the dependent device
  *
- *  Allocate memory for a dependent device structure for a device referenced
- *  by the acpi handle
+ * Add the dependent device to the dock's dependent device list.
  */
-static struct dock_dependent_device *
-alloc_dock_dependent_device(acpi_handle handle)
+static int
+add_dock_dependent_device(struct dock_station *ds, acpi_handle handle)
 {
 	struct dock_dependent_device *dd;
 
 	dd = kzalloc(sizeof(*dd), GFP_KERNEL);
-	if (dd) {
-		dd->handle = handle;
-		INIT_LIST_HEAD(&dd->list);
-		INIT_LIST_HEAD(&dd->hotplug_list);
-	}
-	return dd;
-}
+	if (!dd)
+		return -ENOMEM;
+
+	dd->handle = handle;
+	INIT_LIST_HEAD(&dd->list);
+	INIT_LIST_HEAD(&dd->hotplug_list);
 
-/**
- * add_dock_dependent_device - associate a device with the dock station
- * @ds: The dock station
- * @dd: The dependent device
- *
- * Add the dependent device to the dock's dependent device list.
- */
-static void
-add_dock_dependent_device(struct dock_station *ds,
-			  struct dock_dependent_device *dd)
-{
 	spin_lock(&ds->dd_lock);
 	list_add_tail(&dd->list, &ds->dependent_devices);
 	spin_unlock(&ds->dd_lock);
+
+	return 0;
 }
 
 /**
@@ -249,6 +238,7 @@ static int is_battery(acpi_handle handle)
 static int is_ejectable_bay(acpi_handle handle)
 {
 	acpi_handle phandle;
+
 	if (!is_ejectable(handle))
 		return 0;
 	if (is_battery(handle) || is_ata(handle))
@@ -275,14 +265,13 @@ int is_dock_device(acpi_handle handle)
 
 	if (is_dock(handle))
 		return 1;
-	list_for_each_entry(dock_station, &dock_stations, sibling) {
+
+	list_for_each_entry(dock_station, &dock_stations, sibling)
 		if (find_dock_dependent_device(dock_station, handle))
 			return 1;
-	}
 
 	return 0;
 }
-
 EXPORT_SYMBOL_GPL(is_dock_device);
 
 /**
@@ -305,8 +294,6 @@ static int dock_present(struct dock_station *ds)
 	return 0;
 }
 
-
-
 /**
  * dock_create_acpi_device - add new devices to acpi
  * @handle - handle of the device to add
@@ -320,7 +307,7 @@ static int dock_present(struct dock_station *ds)
  */
 static struct acpi_device * dock_create_acpi_device(acpi_handle handle)
 {
-	struct acpi_device *device = NULL;
+	struct acpi_device *device;
 	struct acpi_device *parent_device;
 	acpi_handle parent;
 	int ret;
@@ -337,8 +324,7 @@ static struct acpi_device * dock_create_acpi_device(acpi_handle handle)
 		ret = acpi_bus_add(&device, parent_device, handle,
 			ACPI_BUS_TYPE_DEVICE);
 		if (ret) {
-			pr_debug("error adding bus, %x\n",
-				-ret);
+			pr_debug("error adding bus, %x\n", -ret);
 			return NULL;
 		}
 	}
@@ -364,7 +350,6 @@ static void dock_remove_acpi_device(acpi_handle handle)
 	}
 }
 
-
 /**
  * hotplug_dock_devices - insert or remove devices on the dock station
  * @ds: the dock station
@@ -384,10 +369,9 @@ static void hotplug_dock_devices(struct dock_station *ds, u32 event)
 	/*
 	 * First call driver specific hotplug functions
 	 */
-	list_for_each_entry(dd, &ds->hotplug_devices, hotplug_list) {
+	list_for_each_entry(dd, &ds->hotplug_devices, hotplug_list)
 		if (dd->ops && dd->ops->handler)
 			dd->ops->handler(dd->handle, event, dd->context);
-	}
 
 	/*
 	 * Now make sure that an acpi_device is created for each
@@ -426,6 +410,7 @@ static void dock_event(struct dock_station *ds, u32 event, int num)
 	list_for_each_entry(dd, &ds->hotplug_devices, hotplug_list)
 		if (dd->ops && dd->ops->uevent)
 			dd->ops->uevent(dd->handle, event, dd->context);
+
 	if (num != DOCK_EVENT)
 		kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp);
 }
@@ -456,8 +441,8 @@ static void eject_dock(struct dock_station *ds)
 	arg.type = ACPI_TYPE_INTEGER;
 	arg.integer.value = 1;
 
-	if (ACPI_FAILURE(acpi_evaluate_object(ds->handle, "_EJ0",
-					      &arg_list, NULL)))
+	status = acpi_evaluate_object(ds->handle, "_EJ0", &arg_list, NULL);
+	if (ACPI_FAILURE(status))
 		pr_debug("Failed to evaluate _EJ0!\n");
 }
 
@@ -577,7 +562,6 @@ int register_dock_notifier(struct notifier_block *nb)
 
 	return atomic_notifier_chain_register(&dock_notifier_list, nb);
 }
-
 EXPORT_SYMBOL_GPL(register_dock_notifier);
 
 /**
@@ -591,7 +575,6 @@ void unregister_dock_notifier(struct notifier_block *nb)
 
 	atomic_notifier_chain_unregister(&dock_notifier_list, nb);
 }
-
 EXPORT_SYMBOL_GPL(unregister_dock_notifier);
 
 /**
@@ -636,7 +619,6 @@ register_hotplug_dock_device(acpi_handle handle, struct acpi_dock_ops *ops,
 
 	return ret;
 }
-
 EXPORT_SYMBOL_GPL(register_hotplug_dock_device);
 
 /**
@@ -657,7 +639,6 @@ void unregister_hotplug_dock_device(acpi_handle handle)
 			dock_del_hotplug_device(dock_station, dd);
 	}
 }
-
 EXPORT_SYMBOL_GPL(unregister_hotplug_dock_device);
 
 /**
@@ -772,7 +753,7 @@ struct dock_data {
 
 static void acpi_dock_deferred_cb(void *context)
 {
-	struct dock_data *data = (struct dock_data *)context;
+	struct dock_data *data = context;
 
 	dock_notify(data->handle, data->event, data->ds);
 	kfree(data);
@@ -782,23 +763,22 @@ static int acpi_dock_notifier_call(struct notifier_block *this,
 	unsigned long event, void *data)
 {
 	struct dock_station *dock_station;
-	acpi_handle handle = (acpi_handle)data;
+	acpi_handle handle = data;
 
 	if (event != ACPI_NOTIFY_BUS_CHECK && event != ACPI_NOTIFY_DEVICE_CHECK
 	   && event != ACPI_NOTIFY_EJECT_REQUEST)
 		return 0;
 	list_for_each_entry(dock_station, &dock_stations, sibling) {
 		if (dock_station->handle == handle) {
-			struct dock_data *dock_data;
+			struct dock_data *dd;
 
-			dock_data = kmalloc(sizeof(*dock_data), GFP_KERNEL);
-			if (!dock_data)
+			dd = kmalloc(sizeof(*dd), GFP_KERNEL);
+			if (!dd)
 				return 0;
-			dock_data->handle = handle;
-			dock_data->event = event;
-			dock_data->ds = dock_station;
-			acpi_os_hotplug_execute(acpi_dock_deferred_cb,
-				dock_data);
+			dd->handle = handle;
+			dd->event = event;
+			dd->ds = dock_station;
+			acpi_os_hotplug_execute(acpi_dock_deferred_cb, dd);
 			return 0 ;
 		}
 	}
@@ -826,7 +806,6 @@ find_dock_devices(acpi_handle handle, u32 lvl, void *context, void **rv)
 	acpi_status status;
 	acpi_handle tmp, parent;
 	struct dock_station *ds = context;
-	struct dock_dependent_device *dd;
 
 	status = acpi_bus_get_ejd(handle, &tmp);
 	if (ACPI_FAILURE(status)) {
@@ -840,11 +819,9 @@ find_dock_devices(acpi_handle handle, u32 lvl, void *context, void **rv)
 			goto fdd_out;
 	}
 
-	if (tmp == ds->handle) {
-		dd = alloc_dock_dependent_device(handle);
-		if (dd)
-			add_dock_dependent_device(ds, dd);
-	}
+	if (tmp == ds->handle)
+		add_dock_dependent_device(ds, handle);
+
 fdd_out:
 	return AE_OK;
 }
@@ -857,8 +834,7 @@ static ssize_t show_docked(struct device *dev,
 {
 	struct acpi_device *tmp;
 
-	struct dock_station *dock_station = *((struct dock_station **)
-		dev->platform_data);
+	struct dock_station *dock_station = dev->platform_data;
 
 	if (ACPI_SUCCESS(acpi_bus_get_device(dock_station->handle, &tmp)))
 		return snprintf(buf, PAGE_SIZE, "1\n");
@@ -872,8 +848,7 @@ static DEVICE_ATTR(docked, S_IRUGO, show_docked, NULL);
 static ssize_t show_flags(struct device *dev,
 			  struct device_attribute *attr, char *buf)
 {
-	struct dock_station *dock_station = *((struct dock_station **)
-		dev->platform_data);
+	struct dock_station *dock_station = dev->platform_data;
 	return snprintf(buf, PAGE_SIZE, "%d\n", dock_station->flags);
 
 }
@@ -886,8 +861,7 @@ static ssize_t write_undock(struct device *dev, struct device_attribute *attr,
 			   const char *buf, size_t count)
 {
 	int ret;
-	struct dock_station *dock_station = *((struct dock_station **)
-		dev->platform_data);
+	struct dock_station *dock_station = dev->platform_data;
 
 	if (!count)
 		return -EINVAL;
@@ -905,8 +879,7 @@ static ssize_t show_dock_uid(struct device *dev,
 			     struct device_attribute *attr, char *buf)
 {
 	unsigned long long lbuf;
-	struct dock_station *dock_station = *((struct dock_station **)
-		dev->platform_data);
+	struct dock_station *dock_station = dev->platform_data;
 	acpi_status status = acpi_evaluate_integer(dock_station->handle,
 					"_UID", NULL, &lbuf);
 	if (ACPI_FAILURE(status))
@@ -919,8 +892,7 @@ static DEVICE_ATTR(uid, S_IRUGO, show_dock_uid, NULL);
 static ssize_t show_dock_type(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
-	struct dock_station *dock_station = *((struct dock_station **)
-		dev->platform_data);
+	struct dock_station *dock_station = dev->platform_data;
 	char *type;
 
 	if (dock_station->flags & DOCK_IS_DOCK)
@@ -936,6 +908,19 @@ static ssize_t show_dock_type(struct device *dev,
 }
 static DEVICE_ATTR(type, S_IRUGO, show_dock_type, NULL);
 
+static struct attribute *dock_attributes[] = {
+	&dev_attr_docked.attr,
+	&dev_attr_flags.attr,
+	&dev_attr_undock.attr,
+	&dev_attr_uid.attr,
+	&dev_attr_type.attr,
+	NULL
+};
+
+static struct attribute_group dock_attribute_group = {
+	.attrs = dock_attributes
+};
+
 /**
  * dock_add - add a new dock station
  * @handle: the dock station handle
@@ -945,39 +930,30 @@ static DEVICE_ATTR(type, S_IRUGO, show_dock_type, NULL);
  */
 static int dock_add(acpi_handle handle)
 {
-	int ret;
-	struct dock_dependent_device *dd;
-	struct dock_station *dock_station;
-	struct platform_device *dock_device;
+	int ret, id;
+	struct dock_station ds, *dock_station;
+	struct platform_device *dd;
+
+	id = dock_station_count;
+	dd = platform_device_register_data(NULL, "dock", id, &ds, sizeof(ds));
+	if (IS_ERR(dd))
+		return PTR_ERR(dd);
+
+	dock_station = dd->dev.platform_data;
 
-	/* allocate & initialize the dock_station private data */
-	dock_station = kzalloc(sizeof(*dock_station), GFP_KERNEL);
-	if (!dock_station)
-		return -ENOMEM;
 	dock_station->handle = handle;
+	dock_station->dock_device = dd;
 	dock_station->last_dock_time = jiffies - HZ;
-	INIT_LIST_HEAD(&dock_station->dependent_devices);
-	INIT_LIST_HEAD(&dock_station->hotplug_devices);
-	INIT_LIST_HEAD(&dock_station->sibling);
-	spin_lock_init(&dock_station->dd_lock);
+
 	mutex_init(&dock_station->hp_lock);
+	spin_lock_init(&dock_station->dd_lock);
+	INIT_LIST_HEAD(&dock_station->sibling);
+	INIT_LIST_HEAD(&dock_station->hotplug_devices);
 	ATOMIC_INIT_NOTIFIER_HEAD(&dock_notifier_list);
-
-	/* initialize platform device stuff */
-	dock_station->dock_device =
-		platform_device_register_simple(dock_device_name,
-			dock_station_count, NULL, 0);
-	dock_device = dock_station->dock_device;
-	if (IS_ERR(dock_device)) {
-		kfree(dock_station);
-		dock_station = NULL;
-		return PTR_ERR(dock_device);
-	}
-	platform_device_add_data(dock_device, &dock_station,
-		sizeof(struct dock_station *));
+	INIT_LIST_HEAD(&dock_station->dependent_devices);
 
 	/* we want the dock device to send uevents */
-	dev_set_uevent_suppress(&dock_device->dev, 0);
+	dev_set_uevent_suppress(&dd->dev, 0);
 
 	if (is_dock(handle))
 		dock_station->flags |= DOCK_IS_DOCK;
@@ -986,47 +962,9 @@ static int dock_add(acpi_handle handle)
 	if (is_battery(handle))
 		dock_station->flags |= DOCK_IS_BAT;
 
-	ret = device_create_file(&dock_device->dev, &dev_attr_docked);
-	if (ret) {
-		printk(KERN_ERR "Error %d adding sysfs file\n", ret);
-		platform_device_unregister(dock_device);
-		kfree(dock_station);
-		dock_station = NULL;
-		return ret;
-	}
-	ret = device_create_file(&dock_device->dev, &dev_attr_undock);
-	if (ret) {
-		printk(KERN_ERR "Error %d adding sysfs file\n", ret);
-		device_remove_file(&dock_device->dev, &dev_attr_docked);
-		platform_device_unregister(dock_device);
-		kfree(dock_station);
-		dock_station = NULL;
-		return ret;
-	}
-	ret = device_create_file(&dock_device->dev, &dev_attr_uid);
-	if (ret) {
-		printk(KERN_ERR "Error %d adding sysfs file\n", ret);
-		device_remove_file(&dock_device->dev, &dev_attr_docked);
-		device_remove_file(&dock_device->dev, &dev_attr_undock);
-		platform_device_unregister(dock_device);
-		kfree(dock_station);
-		dock_station = NULL;
-		return ret;
-	}
-	ret = device_create_file(&dock_device->dev, &dev_attr_flags);
-	if (ret) {
-		printk(KERN_ERR "Error %d adding sysfs file\n", ret);
-		device_remove_file(&dock_device->dev, &dev_attr_docked);
-		device_remove_file(&dock_device->dev, &dev_attr_undock);
-		device_remove_file(&dock_device->dev, &dev_attr_uid);
-		platform_device_unregister(dock_device);
-		kfree(dock_station);
-		dock_station = NULL;
-		return ret;
-	}
-	ret = device_create_file(&dock_device->dev, &dev_attr_type);
+	ret = sysfs_create_group(&dd->dev.kobj, &dock_attribute_group);
 	if (ret)
-		printk(KERN_ERR"Error %d adding sysfs file\n", ret);
+		goto err_unregister;
 
 	/* Find dependent devices */
 	acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
@@ -1034,58 +972,43 @@ static int dock_add(acpi_handle handle)
 			    dock_station, NULL);
 
 	/* add the dock station as a device dependent on itself */
-	dd = alloc_dock_dependent_device(handle);
-	if (!dd) {
-		kfree(dock_station);
-		dock_station = NULL;
-		ret = -ENOMEM;
-		goto dock_add_err_unregister;
-	}
-	add_dock_dependent_device(dock_station, dd);
+	ret = add_dock_dependent_device(dock_station, handle);
+	if (ret)
+		goto err_rmgroup;
 
 	dock_station_count++;
 	list_add(&dock_station->sibling, &dock_stations);
 	return 0;
 
-dock_add_err_unregister:
-	device_remove_file(&dock_device->dev, &dev_attr_type);
-	device_remove_file(&dock_device->dev, &dev_attr_docked);
-	device_remove_file(&dock_device->dev, &dev_attr_undock);
-	device_remove_file(&dock_device->dev, &dev_attr_uid);
-	device_remove_file(&dock_device->dev, &dev_attr_flags);
-	platform_device_unregister(dock_device);
-	kfree(dock_station);
-	dock_station = NULL;
+err_rmgroup:
+	sysfs_remove_group(&dd->dev.kobj, &dock_attribute_group);
+err_unregister:
+	platform_device_unregister(dd);
+	printk(KERN_ERR "%s encountered error %d\n", __func__, ret);
 	return ret;
 }
 
 /**
  * dock_remove - free up resources related to the dock station
  */
-static int dock_remove(struct dock_station *dock_station)
+static int dock_remove(struct dock_station *ds)
 {
 	struct dock_dependent_device *dd, *tmp;
-	struct platform_device *dock_device = dock_station->dock_device;
+	struct platform_device *dock_device = ds->dock_device;
 
 	if (!dock_station_count)
 		return 0;
 
 	/* remove dependent devices */
-	list_for_each_entry_safe(dd, tmp, &dock_station->dependent_devices,
-				 list)
-	    kfree(dd);
+	list_for_each_entry_safe(dd, tmp, &ds->dependent_devices, list)
+		kfree(dd);
+
+	list_del(&ds->sibling);
 
 	/* cleanup sysfs */
-	device_remove_file(&dock_device->dev, &dev_attr_type);
-	device_remove_file(&dock_device->dev, &dev_attr_docked);
-	device_remove_file(&dock_device->dev, &dev_attr_undock);
-	device_remove_file(&dock_device->dev, &dev_attr_uid);
-	device_remove_file(&dock_device->dev, &dev_attr_flags);
+	sysfs_remove_group(&dock_device->dev.kobj, &dock_attribute_group);
 	platform_device_unregister(dock_device);
 
-	/* free dock station memory */
-	kfree(dock_station);
-	dock_station = NULL;
 	return 0;
 }
 
@@ -1103,11 +1026,10 @@ find_dock(acpi_handle handle, u32 lvl, void *context, void **rv)
 {
 	acpi_status status = AE_OK;
 
-	if (is_dock(handle)) {
-		if (dock_add(handle) >= 0) {
+	if (is_dock(handle))
+		if (dock_add(handle) >= 0)
 			status = AE_CTRL_TERMINATE;
-		}
-	}
+
 	return status;
 }
 
@@ -1145,8 +1067,7 @@ static int __init dock_init(void)
 
 static void __exit dock_exit(void)
 {
-	struct dock_station *dock_station;
-	struct dock_station *tmp;
+	struct dock_station *tmp, *dock_station;
 
 	unregister_acpi_bus_notifier(&dock_acpi_notifier);
 	list_for_each_entry_safe(dock_station, tmp, &dock_stations, sibling)
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-09-23 11:16:43 +0000