From mboxrd@z Thu Jan  1 00:00:00 1970
From: shawn.guo@linaro.org (Shawn Guo)
Date: Tue, 23 Apr 2013 21:44:50 +0800
Subject: RFC: [PATCH] clocksource: tcb: fix min_delta calculation
In-Reply-To: <51768885.4080301@pengutronix.de>
References: <517687AB.1040309@pengutronix.de>
 <1366722524-25991-1-git-send-email-mkl@pengutronix.de>
 <51768885.4080301@pengutronix.de>
Message-ID: <20130423134448.GG27475@S2101-09.ap.freescale.net>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Tue, Apr 23, 2013 at 03:11:33PM +0200, Marc Kleine-Budde wrote:
> On 04/23/2013 03:08 PM, Marc Kleine-Budde wrote:
> > The commit
> > 
> >     77cc982 clocksource: use clockevents_config_and_register() where possible
> > 
> > switches from manually calculating min_delta_ns (and others) and
> > clockevents_register_device() to automatic calculation via
> > clockevents_config_and_register(). During this conversation the "+ 1" in
> > 
> >     min_delta_ns = clockevent_delta2ns(1, &clkevt.clkevt) + 1;
> > 
> > was lost. This leads to problems with schedule_delayed_work() with a delay of
> > "1". Resulting in the work not scheduled in time.
> > 
> > This patch fixes the problem by increasing the min_delta to "2" ticks.
> > 
> > Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
> 
> The problem appears on at91sam9263. This patch successfully fixes the
> problem and applies to current linus/master (post v3.9-rc8).

Thanks for the fixing, Marc.

Acked-by: Shawn Guo <shawn.guo@linaro.org>