mfd: twl6030: Make twl6030_exit_irq() return void

This function returns 0 unconditionally, so there is no benefit in
returning a value at all and make the caller do error checking.

Also the caller (twl_remove()) cannot do anything sensible with an error
code. Passing it up the call stack isn't a good option because the i2c core
ignores error codes (apart from emitting an error message).
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20220113101430.12869-2-u.kleine-koenig@pengutronix.de

drivers/mfd/twl-core.c

@@ -1036,12 +1036,12 @@ static void clocks_init(struct device *dev,
 static int twl_remove(struct i2c_client *client)
 {
 	unsigned i, num_slaves;
-	int status;
+	int status = 0;
 
 	if (twl_class_is_4030())
 		status = twl4030_exit_irq();
 	else
-		status = twl6030_exit_irq();
+		twl6030_exit_irq();
 
 	if (status < 0)
 		return status;

drivers/mfd/twl-core.h

@@ -3,7 +3,7 @@
 #define __TWL_CORE_H__
 
 extern int twl6030_init_irq(struct device *dev, int irq_num);
-extern int twl6030_exit_irq(void);
+extern void twl6030_exit_irq(void);
 extern int twl4030_init_irq(struct device *dev, int irq_num);
 extern int twl4030_exit_irq(void);
 extern int twl4030_init_chip_irq(const char *chip);

drivers/mfd/twl6030-irq.c

@@ -438,7 +438,7 @@ int twl6030_init_irq(struct device *dev, int irq_num)
 	return status;
 }
 
-int twl6030_exit_irq(void)
+void twl6030_exit_irq(void)
 {
 	if (twl6030_irq && twl6030_irq->twl_irq) {
 		unregister_pm_notifier(&twl6030_irq->pm_nb);
@@ -453,6 +453,5 @@ int twl6030_exit_irq(void)
 		 * in this module.
 		 */
 	}
-	return 0;
 }