From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932547Ab1DYUZw (ORCPT ); Mon, 25 Apr 2011 16:25:52 -0400 Received: from 1wt.eu ([62.212.114.60]:34626 "EHLO 1wt.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932536Ab1DYUZs (ORCPT ); Mon, 25 Apr 2011 16:25:48 -0400 Message-Id: <20110425200233.129058612@pcw.home.local> User-Agent: quilt/0.48-1 Date: Mon, 25 Apr 2011 22:02:35 +0200 From: Willy Tarreau To: linux-kernel@vger.kernel.org, stable@kernel.org, stable-review@kernel.org Cc: Jean Delvare , Guenter Roeck , Greg Kroah-Hartman Subject: [PATCH 003/173] hwmon: (via686a) Initialize fan_div values In-Reply-To: <46075c3a3ef08be6d70339617d6afc98@local> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 2.6.27.59-stable review patch. If anyone has any objections, please let us know. ------------------ From: Jean Delvare commit f790674d3f87df6390828ac21a7d1530f71b59c8 upstream. Functions set_fan_min() and set_fan_div() assume that the fan_div values have already been read from the register. The driver currently doesn't initialize them at load time, they are only set when function via686a_update_device() is called. This means that set_fan_min() and set_fan_div() misbehave if, for example, "sensors -s" is called before any monitoring application (e.g. "sensors") is has been run. Fix the problem by always initializing the fan_div values at device bind time. Signed-off-by: Jean Delvare Acked-by: Guenter Roeck Signed-off-by: Greg Kroah-Hartman --- drivers/hwmon/via686a.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) --- a/drivers/hwmon/via686a.c +++ b/drivers/hwmon/via686a.c @@ -687,6 +687,13 @@ static int __devexit via686a_remove(stru return 0; } +static void via686a_update_fan_div(struct via686a_data *data) +{ + int reg = via686a_read_value(data, VIA686A_REG_FANDIV); + data->fan_div[0] = (reg >> 4) & 0x03; + data->fan_div[1] = reg >> 6; +} + static void __devinit via686a_init_device(struct via686a_data *data) { u8 reg; @@ -700,6 +707,9 @@ static void __devinit via686a_init_devic via686a_write_value(data, VIA686A_REG_TEMP_MODE, (reg & ~VIA686A_TEMP_MODE_MASK) | VIA686A_TEMP_MODE_CONTINUOUS); + + /* Pre-read fan clock divisor values */ + via686a_update_fan_div(data); } static struct via686a_data *via686a_update_device(struct device *dev) @@ -751,9 +761,7 @@ static struct via686a_data *via686a_upda (via686a_read_value(data, VIA686A_REG_TEMP_LOW23) & 0xc0) >> 6; - i = via686a_read_value(data, VIA686A_REG_FANDIV); - data->fan_div[0] = (i >> 4) & 0x03; - data->fan_div[1] = i >> 6; + via686a_update_fan_div(data); data->alarms = via686a_read_value(data, VIA686A_REG_ALARM1) |