ACPI: button: Change return type of two functions to void

The return value of acpi_lid_notify_state() is always 0, so change
its return type to void.

Moreover, the return value of the only caller of that function,
acpi_lid_update_state(), is never used, so change its return type
to void either.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/3429748.44csPzL39Z@rafael.j.wysocki

diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c
index ae97c83bae2cd098d1ec99f17587b630976ca38e..fcb2eed823c15d9e2f78477ee1cf19c5a83a04d0 100644 (file)
--- a/drivers/acpi/button.c
+++ b/drivers/acpi/button.c
@@ -204,7 +204,7 @@ static int acpi_lid_evaluate_state(acpi_handle lid_handle)
        return !!lid_state;
 }
 
-static int acpi_lid_notify_state(struct acpi_button *button, bool state)
+static void acpi_lid_notify_state(struct acpi_button *button, bool state)
 {
        struct acpi_device *device = button->adev;
        ktime_t next_report;
@@ -282,8 +282,6 @@ static int acpi_lid_notify_state(struct acpi_button *button, bool state)
                button->last_state = state;
                button->last_time = ktime_get();
        }
-
-       return 0;
 }
 
 static int __maybe_unused acpi_button_state_seq_show(struct seq_file *seq,
@@ -407,19 +405,18 @@ int acpi_lid_open(void)
 }
 EXPORT_SYMBOL(acpi_lid_open);
 
-static int acpi_lid_update_state(struct acpi_button *button,
-                                bool signal_wakeup)
+static void acpi_lid_update_state(struct acpi_button *button, bool signal_wakeup)
 {
        int state;
 
        state = acpi_lid_evaluate_state(button->adev->handle);
        if (state < 0)
-               return state;
+               return;
 
        if (state && signal_wakeup)
                acpi_pm_wakeup_event(button->dev);
 
-       return acpi_lid_notify_state(button, state);
+       acpi_lid_notify_state(button, state);
 }
 
 static void acpi_lid_initialize_state(struct acpi_button *button)