From: Shin-ichiro KAWASAKI <kawasaki@juno.dti.ne.jp>
Date: Sun, 21 Jun 2009 10:56:22 +0000 (+0000)
Subject: clocksource: sh_tmu: Make undefined TCOR behaviour less undefined.
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=6f4b67b8ff707147e14ee71045ab25aa286520f2;p=deliverable%2Flinux.git

clocksource: sh_tmu: Make undefined TCOR behaviour less undefined.

Avoid undocumented vague TMU behavior when zero value is set to TCOR.

This primarily fixes up issues encountered under qemu with a zero-length
period, while the hardware itself is fairly ambivalent one way or the
other.

Signed-off-by: Shin-ichiro KAWASAKI <kawasaki@juno.dti.ne.jp>
Acked-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---

diff --git a/drivers/clocksource/sh_tmu.c b/drivers/clocksource/sh_tmu.c
index 9ffb05f4095d..93c2322feab7 100644
--- a/drivers/clocksource/sh_tmu.c
+++ b/drivers/clocksource/sh_tmu.c
@@ -161,7 +161,7 @@ static void sh_tmu_set_next(struct sh_tmu_priv *p, unsigned long delta,
 	if (periodic)
 		sh_tmu_write(p, TCOR, delta);
 	else
-		sh_tmu_write(p, TCOR, 0);
+		sh_tmu_write(p, TCOR, 0xffffffff);
 
 	sh_tmu_write(p, TCNT, delta);