Commit af95eade authored Oct 30, 2005 by Clemens Ladisch Committed by Linus Torvalds Oct 30, 2005

[PATCH] hpet: fix division by zero in HPET_INFO



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>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent 8e8505be

drivers/char/hpet.c

+5 −2

Original line number	Diff line number	Diff line
		@@ -494,8 +494,11 @@ hpet_ioctl_common(struct hpet_dev *devp, int cmd, unsigned long arg, int kernel)
		{
		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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