cpuidle: ACPI: fix 'return' with no value build warning

Add return value to fix return-type build warning introduced by
commit efe9711214e6 ("cpuidle: change enter_s2idle() prototype").

Fixes: efe9711214e6 ("cpuidle: change enter_s2idle() prototype")
Signed-off-by: Neal Liu <neal.liu@mediatek.com>
[ rjw: Subject & changelog edits, make acpi_idle_enter_s2idle()
  return 0 in all cases ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 6ffb6c99c2dee66223f2cfd2f223ee7a04e25d4f..0c65a09aec1b04705bc04780d9e466ac242e3663 100644 (file)
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -664,11 +664,11 @@ static int acpi_idle_enter_s2idle(struct cpuidle_device *dev,
                struct acpi_processor *pr = __this_cpu_read(processors);
 
                if (unlikely(!pr))
-                       return;
+                       return 0;
 
                if (pr->flags.bm_check) {
                        acpi_idle_enter_bm(pr, cx, false);
-                       return;
+                       return 0;
                } else {
                        ACPI_FLUSH_CPU_CACHE();
                }