Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756240Ab3DWNIt (ORCPT ); Tue, 23 Apr 2013 09:08:49 -0400 Received: from metis.ext.pengutronix.de ([92.198.50.35]:60548 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755760Ab3DWNIs (ORCPT ); Tue, 23 Apr 2013 09:08:48 -0400 From: Marc Kleine-Budde To: Shawn Guo Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Andres Salomon , arm@kernel.org, John Stultz , Nicolas Ferre , "kernel@pengutronix.de" , Marc Kleine-Budde Subject: RFC: [PATCH] clocksource: tcb: fix min_delta calculation Date: Tue, 23 Apr 2013 15:08:44 +0200 Message-Id: <1366722524-25991-1-git-send-email-mkl@pengutronix.de> X-Mailer: git-send-email 1.8.2.rc2 In-Reply-To: <517687AB.1040309@pengutronix.de> References: <517687AB.1040309@pengutronix.de> X-SA-Exim-Connect-IP: 2001:6f8:1178:2:21e:67ff:fe11:9c5c X-SA-Exim-Mail-From: mkl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1471 Lines: 41 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 --- 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); } -- 1.8.2.rc2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/