[PATCH 3/7] HPET: fix division by zero in HPET_INFO

[Clemens Ladisch <clemens@ladisch.de>]

From: Clemens Ladisch <clemens@ladisch.de>

Fix a division by zero that happened when the HPET_INFO ioctl was
called before a timer frequency had been set.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

Index: linux-2.6.13/drivers/char/hpet.c
===================================================================
--- linux-2.6.13.orig/drivers/char/hpet.c	2005-10-03 22:53:12.000000000 +0200
+++ linux-2.6.13/drivers/char/hpet.c	2005-10-03 22:53:15.000000000 +0200
@@ -494,8 +494,11 @@ hpet_ioctl_common(struct hpet_dev *devp,
 		{
 			struct hpet_info info;
 
-			info.hi_ireqfreq = hpet_time_div(hpetp,
-							 devp->hd_ireqfreq);
+			if (devp->hd_ireqfreq)
+				info.hi_ireqfreq =
+					hpet_time_div(hpetp, devp->hd_ireqfreq);
+			else
+				info.hi_ireqfreq = 0;
 			info.hi_flags =
 			    readq(&timer->hpet_config) & Tn_PER_INT_CAP_MASK;
 			info.hi_hpet = devp->hd_hpets->hp_which;
-
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