diff --git a/drivers/acpi/acpi_pad.c b/drivers/acpi/acpi_pad.c
index f45979aa2d648..76bb9836b6497 100644
--- a/drivers/acpi/acpi_pad.c
+++ b/drivers/acpi/acpi_pad.c
@@ -129,8 +129,10 @@ static void exit_round_robin(unsigned int tsk_index)
 {
 	struct cpumask *pad_busy_cpus = to_cpumask(pad_busy_cpus_bits);
 
-	cpumask_clear_cpu(tsk_in_cpu[tsk_index], pad_busy_cpus);
-	tsk_in_cpu[tsk_index] = -1;
+	if (tsk_in_cpu[tsk_index] != -1) {
+		cpumask_clear_cpu(tsk_in_cpu[tsk_index], pad_busy_cpus);
+		tsk_in_cpu[tsk_index] = -1;
+	}
 }
 
 static unsigned int idle_pct = 5; /* percentage */