Input: atamouse - various cleanups

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

drivers/input/mouse/atarimouse.c

@@ -57,15 +57,12 @@ MODULE_AUTHOR("Michael Schmitz <schmitz@biophys.uni-duesseldorf.de>");
 MODULE_DESCRIPTION("Atari mouse driver");
 MODULE_LICENSE("GPL");
 
-static int mouse_threshold[2] = {2,2};
+static int mouse_threshold[2] = {2, 2};
+module_param_array(mouse_threshold, int, NULL, 0);
 
-#ifdef __MODULE__
-MODULE_PARM(mouse_threshold, "2i");
-#endif
 #ifdef FIXED_ATARI_JOYSTICK
 extern int atari_mouse_buttons;
 #endif
-static int atamouse_used = 0;
 
 static struct input_dev *atamouse_dev;
 
@@ -97,9 +94,6 @@ static void atamouse_interrupt(char *buf)
 
 static int atamouse_open(struct input_dev *dev)
 {
-	if (atamouse_used++)
-		return 0;
-
 #ifdef FIXED_ATARI_JOYSTICK
 	atari_mouse_buttons = 0;
 #endif
@@ -107,23 +101,24 @@ static int atamouse_open(struct input_dev *dev)
 	ikbd_mouse_thresh(mouse_threshold[0], mouse_threshold[1]);
 	ikbd_mouse_rel_pos();
 	atari_input_mouse_interrupt_hook = atamouse_interrupt;
+
 	return 0;
 }
 
 static void atamouse_close(struct input_dev *dev)
 {
-	if (!--atamouse_used) {
-		ikbd_mouse_disable();
-		atari_mouse_interrupt_hook = NULL;
-	}
+	ikbd_mouse_disable();
+	atari_mouse_interrupt_hook = NULL;
 }
 
 static int __init atamouse_init(void)
 {
+	int error;
+
 	if (!MACH_IS_ATARI || !ATARIHW_PRESENT(ST_MFP))
 		return -ENODEV;
 
-	if (!(atari_keyb_init()))
+	if (!atari_keyb_init())
 		return -ENODEV;
 
 	atamouse_dev = input_allocate_device();
@@ -141,12 +136,14 @@ static int __init atamouse_init(void)
 	atamouse_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 	atamouse_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
 		BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
+
 	atamouse_dev->open = atamouse_open;
 	atamouse_dev->close = atamouse_close;
 
-	if (input_register_device(atamouse_dev)) {
+	error = input_register_device(atamouse_dev);
+	if (error) {
 		input_free_device(atamouse_dev);
-		return -ENOMEM;
+		return error;
 	}
 
 	return 0;