1 files changed, 6 insertions, 4 deletions

diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index ee5759bef945..80ffc7829916 100644
--- a/drivers/acpi/processor_idle.c
+++ b/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: