x86, hpet: fix for LS21 + HPET = boot hang
[linux-3.10.git] / arch / x86 / kernel / hpet.c
index cd759ad..5c8da2c 100644 (file)
@@ -269,6 +269,8 @@ static void hpet_set_mode(enum clock_event_mode mode,
                now = hpet_readl(HPET_COUNTER);
                cmp = now + (unsigned long) delta;
                cfg = hpet_readl(HPET_Tn_CFG(timer));
+               /* Make sure we use edge triggered interrupts */
+               cfg &= ~HPET_TN_LEVEL;
                cfg |= HPET_TN_ENABLE | HPET_TN_PERIODIC |
                       HPET_TN_SETVAL | HPET_TN_32BIT;
                hpet_writel(cfg, HPET_Tn_CFG(timer));
@@ -628,11 +630,12 @@ static int hpet_cpuhp_notify(struct notifier_block *n,
 
        switch (action & 0xf) {
        case CPU_ONLINE:
-               INIT_DELAYED_WORK(&work.work, hpet_work);
+               INIT_DELAYED_WORK_ON_STACK(&work.work, hpet_work);
                init_completion(&work.complete);
                /* FIXME: add schedule_work_on() */
                schedule_delayed_work_on(cpu, &work.work, 0);
                wait_for_completion(&work.complete);
+               destroy_timer_on_stack(&work.work.timer);
                break;
        case CPU_DEAD:
                if (hdev) {