From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from wolverine01.qualcomm.com ([199.106.114.254]:12778 "EHLO wolverine01.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755871Ab0JUJ1O (ORCPT ); Thu, 21 Oct 2010 05:27:14 -0400 From: Jeff Ohlstein Subject: [PATCH] msm: timer: Decrease shift on timer clocksource Date: Thu, 21 Oct 2010 02:25:45 -0700 Message-Id: <1287653148-1103-1-git-send-email-johlstei@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org List-ID: To: Daniel Walker Cc: linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Jeff Ohlstein , David Brown , Bryan Huntsman , Russell King The shift of 24 causes the shift and multiply operation to sometimes overflow, resulting in incorrect timer values and poor performance. Signed-off-by: Jeff Ohlstein --- arch/arm/mach-msm/timer.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/arm/mach-msm/timer.c b/arch/arm/mach-msm/timer.c index 7689848..950100f 100644 --- a/arch/arm/mach-msm/timer.c +++ b/arch/arm/mach-msm/timer.c @@ -137,7 +137,7 @@ static struct msm_clock msm_clocks[] = { .rating = 200, .read = msm_gpt_read, .mask = CLOCKSOURCE_MASK(32), - .shift = 24, + .shift = 17, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }, .irq = { -- 1.7.3.1 Sent by an employee of the Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.