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hwmon: (lm90) Only disable alerts if not already disabled

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It was observed that the alert handler may be called from the i2c core
even after alerts have already been disabled. Only disable alerts if
they have not already been disabled.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2021-12-28 07:59:26 -08:00
parent 41e6d7215d
commit b1526b38e3
1 changed files with 4 additions and 2 deletions
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6
drivers/hwmon/lm90.c
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@ -2660,8 +2660,10 @@ static void lm90_alert(struct i2c_client *client, enum i2c_alert_protocol type,
if ((data->flags & LM90_HAVE_BROKEN_ALERT) &&
(data->current_alarms & data->alert_alarms)) {
dev_dbg(&client->dev, "Disabling ALERT#\n");
lm90_update_confreg(data, data->config | 0x80);
if (!(data->config & 0x80)) {
dev_dbg(&client->dev, "Disabling ALERT#\n");
lm90_update_confreg(data, data->config | 0x80);
}
schedule_delayed_work(&data->alert_work,
max_t(int, HZ, msecs_to_jiffies(data->update_interval)));
}