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-rw-r--r--drivers/char/hpet.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index c055bb6..b619ca5 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;
}
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