1 files changed, 6 insertions, 3 deletions

diff --git a/arch/i386/kernel/i8253.c b/arch/i386/kernel/i8253.c
index 931eabe1e560..bde249dda94d 100644
--- a/arch/i386/kernel/i8253.c
+++ b/arch/i386/kernel/i8253.c
@@ -47,9 +47,12 @@ static void init_pit_timer(enum clock_event_mode mode,
 
         case CLOCK_EVT_MODE_SHUTDOWN:
         case CLOCK_EVT_MODE_UNUSED:
-                outb_p(0x30, PIT_MODE);
-                outb_p(0, PIT_CH0);     /* LSB */
-                outb_p(0, PIT_CH0);     /* MSB */
+                if (evt->mode == CLOCK_EVT_MODE_PERIODIC ||
+                    evt->mode == CLOCK_EVT_MODE_ONESHOT) {
+                        outb_p(0x30, PIT_MODE);
+                        outb_p(0, PIT_CH0);
+                        outb_p(0, PIT_CH0);
+                }
                 break;
 
         case CLOCK_EVT_MODE_ONESHOT: