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-rw-r--r--arch/i386/kernel/i8253.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/i386/kernel/i8253.c b/arch/i386/kernel/i8253.c
index 5cbb776b308..10cef5ca8a5 100644
--- a/arch/i386/kernel/i8253.c
+++ b/arch/i386/kernel/i8253.c
@@ -47,9 +47,17 @@ static void init_pit_timer(enum clock_event_mode mode,
outb(LATCH >> 8 , PIT_CH0); /* MSB */
break;
- case CLOCK_EVT_MODE_ONESHOT:
+ /*
+ * Avoid unnecessary state transitions, as it confuses
+ * Geode / Cyrix based boxen.
+ */
case CLOCK_EVT_MODE_SHUTDOWN:
+ if (evt->mode == CLOCK_EVT_MODE_UNUSED)
+ break;
case CLOCK_EVT_MODE_UNUSED:
+ if (evt->mode == CLOCK_EVT_MODE_SHUTDOWN)
+ break;
+ case CLOCK_EVT_MODE_ONESHOT:
/* One shot setup */
outb_p(0x38, PIT_MODE);
udelay(10);