diff --git a/[refs] b/[refs]
index ba8a4dde4664..cece922a3104 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 83dd4504456d4b5e464d6ec4a7665e2c922db67f
+refs/heads/master: d5a3d32a042126f65a008e0e5204ef92ad2ee55d
diff --git a/trunk/drivers/acpi/processor_idle.c b/trunk/drivers/acpi/processor_idle.c
index ee5759bef945..80ffc7829916 100644
--- a/trunk/drivers/acpi/processor_idle.c
+++ b/trunk/drivers/acpi/processor_idle.c
@@ -332,16 +332,18 @@ static void acpi_processor_idle(void)
 	int sleep_ticks = 0;
 	u32 t1, t2 = 0;
 
-	pr = processors[smp_processor_id()];
-	if (!pr)
-		return;
-
 	/*
 	 * Interrupts must be disabled during bus mastering calculations and
 	 * for C2/C3 transitions.
 	 */
 	local_irq_disable();
 
+	pr = processors[smp_processor_id()];
+	if (!pr) {
+		local_irq_enable();
+		return;
+	}
+
 	/*
 	 * Check whether we truly need to go idle, or should
 	 * reschedule: