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    SubjectRe: [PATCH] Blacklist Dell Optiplex 320 from using the HPET
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    Guilherme,

    please discard the previous patch. I missed to refresh it before sending
    it out. Correct version below.

    tglx

    On Sat, 2007-05-05 at 16:26 +0200, Thomas Gleixner wrote:
    > can you please undo John's patch and check whether the patch below works
    > for you.

    Index: linux-2.6.21/arch/i386/kernel/hpet.c
    ===================================================================
    --- linux-2.6.21.orig/arch/i386/kernel/hpet.c
    +++ linux-2.6.21/arch/i386/kernel/hpet.c
    @@ -231,6 +231,7 @@ int __init hpet_enable(void)
    {
    unsigned long id;
    uint64_t hpet_freq;
    + cycle_t t1;
    u64 tmp;

    if (!is_hpet_capable())
    @@ -278,6 +279,14 @@ int __init hpet_enable(void)
    /* Start the counter */
    hpet_start_counter();

    + /* Verify whether hpet counter works */
    + t1 = read_hpet();
    + udelay(50);
    + if (t1 == read_hpet()) {
    + printk(KERN_WARNING "HPET counter is defect\n");
    + goto out_nohpet;
    + }
    +
    /* Initialize and register HPET clocksource
    *
    * hpet period is in femto seconds per cycle

    -
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