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Prevent fan_min overflow when changing fan_div.

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git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@2580 7894878c-1315-0410-8ee3-d5d059ff63e0
This commit is contained in:
Jean Delvare committed 2004-06-05 09:54:33 +00:00
1 parent 2130cacf83
commit fb884933da
1 file changed
+9 -6
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kernel/chips/adm1031.c
+9 -6
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@@ -610,26 +610,29 @@ static void adm1031_fan_div(struct i2c_client *client, int operation,
*nrels_mag = 2;
}
} else if (operation == SENSORS_PROC_REAL_WRITE) {
int old_div, new_min;
if (*nrels_mag >= 1) {
int old_div = FAN_DIV_FROM_REG(data->fan_div[0]);
old_div = FAN_DIV_FROM_REG(data->fan_div[0]);
data->fan_div[0] = FAN_DIV_TO_REG(results[0]);
adm1031_write_value(client,
ADM1031_REG_FAN_DIV(0),
data->fan_div[0]);
data->fan_min[0] = data->fan_min[0] * old_div /
FAN_DIV_FROM_REG(data->fan_div[0]);
new_min = data->fan_min[0] * old_div /
FAN_DIV_FROM_REG(data->fan_div[0]);
data->fan_min[0] = new_min > 0xff ? 0xff : new_min;
adm1031_write_value(client,
ADM1031_REG_FAN_MIN(0),
data->fan_min[0]);
}
if (*nrels_mag >= 2) {
int old_div = FAN_DIV_FROM_REG(data->fan_div[1]);
old_div = FAN_DIV_FROM_REG(data->fan_div[1]);
data->fan_div[1] = FAN_DIV_TO_REG(results[1]);
adm1031_write_value(client,
ADM1031_REG_FAN_DIV(1),
data->fan_div[1]);
data->fan_min[1] = data->fan_min[1] * old_div /
FAN_DIV_FROM_REG(data->fan_div[1]);
new_min = data->fan_min[1] * old_div /
FAN_DIV_FROM_REG(data->fan_div[1]);
data->fan_min[1] = new_min > 0xff ? 0xff : new_min;
adm1031_write_value(client,
ADM1031_REG_FAN_MIN(1),
data->fan_min[1]);