diff options
Diffstat (limited to 'drivers/char/hpet.c')
| -rw-r--r-- | drivers/char/hpet.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c index c055bb630ff..b619ca5eaf8 100644 --- a/drivers/char/hpet.c +++ b/drivers/char/hpet.c @@ -364,6 +364,9 @@ static int hpet_ioctl_ieon(struct hpet_dev *devp) hpet = devp->hd_hpet; hpetp = devp->hd_hpets; + if (!devp->hd_ireqfreq) + return -EIO; + v = readq(&timer->hpet_config); spin_lock_irq(&hpet_lock); @@ -516,7 +519,7 @@ hpet_ioctl_common(struct hpet_dev *devp, int cmd, unsigned long arg, int kernel) break; } - if (arg & (arg - 1)) { + if (!arg || (arg & (arg - 1))) { err = -EINVAL; break; } |