lkml.org 
[lkml]   [2007]   [Jun]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    Subject[patch -mm 14/28] i386: PIT stop only, when in periodic or oneshot mode
    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 <tglx@linutronix.de>
    ---
    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/

    \
     
     \ /
      Last update: 2007-06-23 15:29    [W:4.169 / U:0.056 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site