ARM: 9049/1: locomo: make locomo bus's remove callback return void

The driver core ignores the return value of struct bus_type::remove
because there is only little that can be done. To simplify the quest to
make this function return void, let struct locomo_driver::remove return
void, too. All users already unconditionally return 0, this commit makes
it obvious that returning an error code is a bad idea and ensures future
users behave accordingly.

Link: https://lore.kernel.org/r/[e-mail]

Acked-by: Dmitry Torokhov <[e-mail]>
Acked-by: Lee Jones <[e-mail]>
Signed-off-by: Uwe Kleine-König <[e-mail]>
Signed-off-by: Russell King <[e-mail]>

arch/arm/common/locomo.c

···
 {
 	struct locomo_dev *ldev = LOCOMO_DEV(dev);
 	struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
-	int ret = 0;
 
 	if (drv->remove)
-		ret = drv->remove(ldev);
-	return ret;
+		drv->remove(ldev);
+	return 0;
 }
 
 struct bus_type locomo_bus_type = {

arch/arm/include/asm/hardware/locomo.h

···
 	struct device_driver	drv;
 	unsigned int		devid;
 	int (*probe)(struct locomo_dev *);
-	int (*remove)(struct locomo_dev *);
+	void (*remove)(struct locomo_dev *);
 };
 
 #define LOCOMO_DRV(_d)	container_of((_d), struct locomo_driver, drv)

arch/arm/mach-sa1100/collie.c

···
 	return 0;
 }
 
-static int collie_uart_remove(struct locomo_dev *dev)
-{
-	return 0;
-}
-
 static struct locomo_driver collie_uart_driver = {
 	.drv = {
 		.name = "collie_uart",
 	},
 	.devid	= LOCOMO_DEVID_UART,
 	.probe	= collie_uart_probe,
-	.remove	= collie_uart_remove,
 };
 
 static int __init collie_uart_init(void)

drivers/input/keyboard/locomokbd.c

···
 	return err;
 }
 
-static int locomokbd_remove(struct locomo_dev *dev)
+static void locomokbd_remove(struct locomo_dev *dev)
 {
 	struct locomokbd *locomokbd = locomo_get_drvdata(dev);
 
···
 	release_mem_region((unsigned long) dev->mapbase, dev->length);
 
 	kfree(locomokbd);
-
-	return 0;
 }
 
 static struct locomo_driver keyboard_driver = {

drivers/video/backlight/locomolcd.c

···
 	return 0;
 }
 
-static int locomolcd_remove(struct locomo_dev *dev)
+static void locomolcd_remove(struct locomo_dev *dev)
 {
 	unsigned long flags;
 
···
 	local_irq_save(flags);
 	locomolcd_dev = NULL;
 	local_irq_restore(flags);
-	return 0;
 }
 
 static struct locomo_driver poodle_lcd_driver = {