diff options
| author |   Balaji Rao <balajirrao@gmail.com> | 2008-01-30 13:30:03 +0100 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:30:03 +0100 |
| commit | 37a47db8d7f0f38dac5acf5a13abbc8f401707fa (patch) | |
| tree | f3827e6b77a81680b2870f82a22bb86c4fefefee /drivers/char/hpet.c | |
| parent | x86: assign IRQs to HPET timers (diff) | |
| download | linux-dev-37a47db8d7f0f38dac5acf5a13abbc8f401707fa.tar.xz linux-dev-37a47db8d7f0f38dac5acf5a13abbc8f401707fa.zip | |
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 <balajirrao@gmail.com>
Tested-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers/char/hpet.c')
| -rw-r--r-- | drivers/char/hpet.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c index 593b32cfbc33..22f5fd02ea87 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; |