From a228ddd51bdfb5e22a33459cadd5f0e68ee433f6 Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Mon, 15 Oct 2007 14:32:27 +0200 Subject: [PATCH] hwmon/w83627hf: Fix setting fan min right after driver load Already in Linus' tree: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=c09c5184a26158da32801e89d5849d774605f0dd We need to read the fan clock dividers at initialization time, otherwise the code in store_fan_min() may use uninitialized values. That's pretty much the same bug and same fix as for the w83627ehf driver last month. Signed-off-by: Jean Delvare Signed-off-by: Mark M. Hoffman Signed-off-by: Greg Kroah-Hartman --- drivers/hwmon/w83627hf.c | 34 ++++++++++++++++++++++------------ 1 file changed, 22 insertions(+), 12 deletions(-) diff --git a/drivers/hwmon/w83627hf.c b/drivers/hwmon/w83627hf.c index 7a4a15f4bf8b..ab30f48e750d 100644 --- a/drivers/hwmon/w83627hf.c +++ b/drivers/hwmon/w83627hf.c @@ -391,6 +391,7 @@ static int __devexit w83627hf_remove(struct platform_device *pdev); static int w83627hf_read_value(struct w83627hf_data *data, u16 reg); static int w83627hf_write_value(struct w83627hf_data *data, u16 reg, u16 value); +static void w83627hf_update_fan_div(struct w83627hf_data *data); static struct w83627hf_data *w83627hf_update_device(struct device *dev); static void w83627hf_init_device(struct platform_device *pdev); @@ -1244,6 +1245,7 @@ static int __devinit w83627hf_probe(struct platform_device *pdev) data->fan_min[0] = w83627hf_read_value(data, W83781D_REG_FAN_MIN(1)); data->fan_min[1] = w83627hf_read_value(data, W83781D_REG_FAN_MIN(2)); data->fan_min[2] = w83627hf_read_value(data, W83781D_REG_FAN_MIN(3)); + w83627hf_update_fan_div(data); /* Register common device attributes */ if ((err = sysfs_create_group(&dev->kobj, &w83627hf_group))) @@ -1556,6 +1558,24 @@ static void __devinit w83627hf_init_device(struct platform_device *pdev) | 0x01); } +static void w83627hf_update_fan_div(struct w83627hf_data *data) +{ + int reg; + + reg = w83627hf_read_value(data, W83781D_REG_VID_FANDIV); + data->fan_div[0] = (reg >> 4) & 0x03; + data->fan_div[1] = (reg >> 6) & 0x03; + if (data->type != w83697hf) { + data->fan_div[2] = (w83627hf_read_value(data, + W83781D_REG_PIN) >> 6) & 0x03; + } + reg = w83627hf_read_value(data, W83781D_REG_VBAT); + data->fan_div[0] |= (reg >> 3) & 0x04; + data->fan_div[1] |= (reg >> 4) & 0x04; + if (data->type != w83697hf) + data->fan_div[2] |= (reg >> 5) & 0x04; +} + static struct w83627hf_data *w83627hf_update_device(struct device *dev) { struct w83627hf_data *data = dev_get_drvdata(dev); @@ -1633,18 +1653,8 @@ static struct w83627hf_data *w83627hf_update_device(struct device *dev) w83627hf_read_value(data, W83781D_REG_TEMP_HYST(3)); } - i = w83627hf_read_value(data, W83781D_REG_VID_FANDIV); - data->fan_div[0] = (i >> 4) & 0x03; - data->fan_div[1] = (i >> 6) & 0x03; - if (data->type != w83697hf) { - data->fan_div[2] = (w83627hf_read_value(data, - W83781D_REG_PIN) >> 6) & 0x03; - } - i = w83627hf_read_value(data, W83781D_REG_VBAT); - data->fan_div[0] |= (i >> 3) & 0x04; - data->fan_div[1] |= (i >> 4) & 0x04; - if (data->type != w83697hf) - data->fan_div[2] |= (i >> 5) & 0x04; + w83627hf_update_fan_div(data); + data->alarms = w83627hf_read_value(data, W83781D_REG_ALARM1) | (w83627hf_read_value(data, W83781D_REG_ALARM2) << 8) | -- 2.39.5