From 37a47db8d7f0f38dac5acf5a13abbc8f401707fa Mon Sep 17 00:00:00 2001 From: Balaji Rao Date: Wed, 30 Jan 2008 13:30:03 +0100 Subject: x86: assign IRQs to HPET timers, fix Looks like IRQ 31 is assigned to timer 3, even without the patch! I wonder who wrote the number 31. But the manual says that it is zero by default. I think we should check whether the timer has been allocated an IRQ before proceeding to assign one to it. Here is a patch that does this. Signed-off-by: Balaji Rao Tested-by: Yinghai Lu Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- drivers/char/hpet.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'drivers/char/hpet.c') diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c index 593b32cfbc3..22f5fd02ea8 100644 --- a/drivers/char/hpet.c +++ b/drivers/char/hpet.c @@ -852,6 +852,12 @@ int hpet_alloc(struct hpet_data *hdp) timer = &hpet->hpet_timers[devp - hpetp->hp_dev]; + /* Check if there's already an IRQ assigned to the timer */ + if (hdp->hd_irq[i]) { + hpetp->hp_dev[i].hd_hdwirq = hdp->hd_irq[i]; + continue; + } + hpet_config = readq(&timer->hpet_config); irq_bitmap = (hpet_config & Tn_INT_ROUTE_CAP_MASK) >> Tn_INT_ROUTE_CAP_SHIFT; -- cgit v1.2.3