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>
Cc: Bob Picco <bob.picco@hp.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 drivers/char/hpet.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff -puN drivers/char/hpet.c~hpet-fix-division-by-zero-in-hpet_info drivers/char/hpet.c
--- devel/drivers/char/hpet.c~hpet-fix-division-by-zero-in-hpet_info	2005-10-11 18:08:51.000000000 -0700
+++ devel-akpm/drivers/char/hpet.c	2005-10-11 18:08:51.000000000 -0700
@@ -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;
_