From: Marc Kleine-Budde <mkl@pengutronix.de>
To: Marc Kleine-Budde <mkl@pengutronix.de>
Cc: Shawn Guo <shawn.guo@linaro.org>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Andres Salomon <dilinger@queued.net>,
arm@kernel.org, John Stultz <john.stultz@linaro.org>,
Nicolas Ferre <nicolas.ferre@atmel.com>,
"kernel@pengutronix.de" <kernel@pengutronix.de>,
Thomas Gleixner <tglx@linutronix.de>,
Arnd Bergmann <arnd@arndb.de>
Subject: Re: RFC: [PATCH] clocksource: tcb: fix min_delta calculation
Date: Thu, 25 Apr 2013 15:36:50 +0200 [thread overview]
Message-ID: <51793172.9030802@pengutronix.de> (raw)
In-Reply-To: <1366722524-25991-1-git-send-email-mkl@pengutronix.de>
[-- Attachment #1: Type: text/plain, Size: 1690 bytes --]
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>
Who will take care of this patch?
Marc
> ---
> drivers/clocksource/tcb_clksrc.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/clocksource/tcb_clksrc.c b/drivers/clocksource/tcb_clksrc.c
> index 8a61872..7cf6dc7 100644
> --- a/drivers/clocksource/tcb_clksrc.c
> +++ b/drivers/clocksource/tcb_clksrc.c
> @@ -197,7 +197,7 @@ static void __init setup_clkevents(struct atmel_tc *tc, int clk32k_divisor_idx)
>
> clkevt.clkevt.cpumask = cpumask_of(0);
>
> - clockevents_config_and_register(&clkevt.clkevt, 32768, 1, 0xffff);
> + clockevents_config_and_register(&clkevt.clkevt, 32768, 2, 0xffff);
>
> setup_irq(irq, &tc_irqaction);
> }
>
--
Pengutronix e.K. | Marc Kleine-Budde |
Industrial Linux Solutions | Phone: +49-231-2826-924 |
Vertretung West/Dortmund | Fax: +49-5121-206917-5555 |
Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de |
[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 263 bytes --]
next prev parent reply other threads:[~2013-04-25 13:37 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-12 11:50 [PATCH v2 0/3] Use helper clockevents_config_and_register() Shawn Guo
2013-01-12 11:50 ` [PATCH v2 1/3] clockevents: export clockevents_config_and_register for module use Shawn Guo
2013-01-12 11:50 ` [PATCH v2 2/3] ARM: use clockevents_config_and_register() where possible Shawn Guo
2013-01-12 21:25 ` Jason Cooper
2013-01-12 11:50 ` [PATCH v2 3/3] clocksource: " Shawn Guo
2013-04-23 13:07 ` BUG: " Marc Kleine-Budde
2013-04-23 13:08 ` RFC: [PATCH] clocksource: tcb: fix min_delta calculation Marc Kleine-Budde
2013-04-23 13:11 ` Marc Kleine-Budde
2013-04-23 13:44 ` Shawn Guo
2013-04-23 13:50 ` Marc Kleine-Budde
2013-04-25 13:36 ` Marc Kleine-Budde [this message]
2013-04-25 14:18 ` Thomas Gleixner
2013-04-25 14:21 ` Thomas Gleixner
2013-04-25 14:53 ` Marc Kleine-Budde
2013-06-20 15:00 ` Marc Kleine-Budde
2013-09-09 8:18 ` Ronald Wahl
2013-09-09 13:56 ` Marc Kleine-Budde
2013-01-12 21:14 ` [PATCH v2 0/3] Use helper clockevents_config_and_register() Arnd Bergmann
2013-01-14 11:23 ` Thomas Gleixner
2013-01-14 18:16 ` Olof Johansson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=51793172.9030802@pengutronix.de \
--to=mkl@pengutronix.de \
--cc=arm@kernel.org \
--cc=arnd@arndb.de \
--cc=dilinger@queued.net \
--cc=john.stultz@linaro.org \
--cc=kernel@pengutronix.de \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=nicolas.ferre@atmel.com \
--cc=shawn.guo@linaro.org \
--cc=tglx@linutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).