The patch is necessary on one of my boxen, where programming the stop sequence twice leads to PIT malfunction. Sigh ! Signed-off-by: Thomas Gleixner --- arch/i386/kernel/i8253.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) Index: linux-2.6.22-rc4-mm/arch/i386/kernel/i8253.c =================================================================== --- linux-2.6.22-rc4-mm.orig/arch/i386/kernel/i8253.c 2007-06-23 14:38:58.000000000 +0200 +++ linux-2.6.22-rc4-mm/arch/i386/kernel/i8253.c 2007-06-23 14:38:59.000000000 +0200 @@ -48,9 +48,12 @@ static void init_pit_timer(enum clock_ev 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: -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/