Subject: ACPI: button - general cleanup

ACPI: button - general cleanup

Remove unnecessary casts and initializations, clean up formatting.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
---

 drivers/acpi/button.c |   69 ++++++++++++++++----------------------------------
 1 files changed, 23 insertions(+), 46 deletions(-)

Index: work/drivers/acpi/button.c
===================================================================
--- work.orig/drivers/acpi/button.c
+++ work/drivers/acpi/button.c
@@ -62,7 +62,7 @@
 #define _COMPONENT		ACPI_BUTTON_COMPONENT
 ACPI_MODULE_NAME("acpi_button")
 
-    MODULE_AUTHOR("Paul Diefenbaugh");
+MODULE_AUTHOR("Paul Diefenbaugh");
 MODULE_DESCRIPTION(ACPI_BUTTON_DRIVER_NAME);
 MODULE_LICENSE("GPL");
 
@@ -78,7 +78,7 @@ static struct acpi_driver acpi_button_dr
 	.ops = {
 		.add = acpi_button_add,
 		.remove = acpi_button_remove,
-		},
+	},
 };
 
 struct acpi_button {
@@ -109,8 +109,7 @@ static struct proc_dir_entry *acpi_butto
 
 static int acpi_button_info_seq_show(struct seq_file *seq, void *offset)
 {
-	struct acpi_button *button = (struct acpi_button *)seq->private;
-
+	struct acpi_button *button = seq->private;
 
 	if (!button || !button->device)
 		return 0;
@@ -128,22 +127,17 @@ static int acpi_button_info_open_fs(stru
 
 static int acpi_button_state_seq_show(struct seq_file *seq, void *offset)
 {
-	struct acpi_button *button = (struct acpi_button *)seq->private;
+	struct acpi_button *button = seq->private;
 	acpi_status status;
 	unsigned long state;
 
-
 	if (!button || !button->device)
 		return 0;
 
 	status = acpi_evaluate_integer(button->device->handle, "_LID", NULL, &state);
-	if (ACPI_FAILURE(status)) {
-		seq_printf(seq, "state:      unsupported\n");
-	} else {
-		seq_printf(seq, "state:      %s\n",
-			   (state ? "open" : "closed"));
-	}
-
+	seq_printf(seq, "state:      %s\n",
+		   ACPI_FAILURE(status) ? "unsupported" :
+			(state ? "open" : "closed"));
 	return 0;
 }
 
@@ -159,8 +153,7 @@ static struct proc_dir_entry *acpi_lid_d
 static int acpi_button_add_fs(struct acpi_device *device)
 {
 	struct proc_dir_entry *entry = NULL;
-	struct acpi_button *button = NULL;
-
+	struct acpi_button *button;
 
 	if (!device || !acpi_driver_data(device))
 		return -EINVAL;
@@ -228,10 +221,8 @@ static int acpi_button_add_fs(struct acp
 
 static int acpi_button_remove_fs(struct acpi_device *device)
 {
-	struct acpi_button *button = NULL;
-
+	struct acpi_button *button = acpi_driver_data(device);
 
-	button = acpi_driver_data(device);
 	if (acpi_device_dir(device)) {
 		if (button->type == ACPI_BUTTON_TYPE_LID)
 			remove_proc_entry(ACPI_BUTTON_FILE_STATE,
@@ -253,8 +244,7 @@ static int acpi_button_remove_fs(struct 
 
 static void acpi_button_notify(acpi_handle handle, u32 event, void *data)
 {
-	struct acpi_button *button = (struct acpi_button *)data;
-
+	struct acpi_button *button = data;
 
 	if (!button || !button->device)
 		return;
@@ -275,8 +265,7 @@ static void acpi_button_notify(acpi_hand
 
 static acpi_status acpi_button_notify_fixed(void *data)
 {
-	struct acpi_button *button = (struct acpi_button *)data;
-
+	struct acpi_button *button = data;
 
 	if (!button)
 		return AE_BAD_PARAMETER;
@@ -288,18 +277,16 @@ static acpi_status acpi_button_notify_fi
 
 static int acpi_button_add(struct acpi_device *device)
 {
-	int result = 0;
-	acpi_status status = AE_OK;
-	struct acpi_button *button = NULL;
-
+	int result;
+	acpi_status status;
+	struct acpi_button *button;
 
 	if (!device)
 		return -EINVAL;
 
-	button = kmalloc(sizeof(struct acpi_button), GFP_KERNEL);
+	button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);
 	if (!button)
 		return -ENOMEM;
-	memset(button, 0, sizeof(struct acpi_button));
 
 	button->device = device;
 	acpi_driver_data(device) = button;
@@ -396,9 +383,7 @@ static int acpi_button_add(struct acpi_d
 
 static int acpi_button_remove(struct acpi_device *device, int type)
 {
-	acpi_status status = 0;
-	struct acpi_button *button = NULL;
-
+	struct acpi_button *button;
 
 	if (!device || !acpi_driver_data(device))
 		return -EINVAL;
@@ -408,24 +393,20 @@ static int acpi_button_remove(struct acp
 	/* Unregister for device notifications. */
 	switch (button->type) {
 	case ACPI_BUTTON_TYPE_POWERF:
-		status =
-		    acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
-						    acpi_button_notify_fixed);
+		acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
+						acpi_button_notify_fixed);
 		break;
 	case ACPI_BUTTON_TYPE_SLEEPF:
-		status =
-		    acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
-						    acpi_button_notify_fixed);
+		acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
+						acpi_button_notify_fixed);
 		break;
 	default:
-		status = acpi_remove_notify_handler(device->handle,
-						    ACPI_DEVICE_NOTIFY,
-						    acpi_button_notify);
+		acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
+					   acpi_button_notify);
 		break;
 	}
 
 	acpi_button_remove_fs(device);
-
 	kfree(button);
 
 	return 0;
@@ -433,8 +414,7 @@ static int acpi_button_remove(struct acp
 
 static int __init acpi_button_init(void)
 {
-	int result = 0;
-
+	int result;
 
 	acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
 	if (!acpi_button_dir)
@@ -451,7 +431,6 @@ static int __init acpi_button_init(void)
 
 static void __exit acpi_button_exit(void)
 {
-
 	acpi_bus_unregister_driver(&acpi_button_driver);
 
 	if (acpi_power_dir)
@@ -461,8 +440,6 @@ static void __exit acpi_button_exit(void
 	if (acpi_lid_dir)
 		remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
 	remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
-
-	return;
 }
 
 module_init(acpi_button_init);