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hwmon: (lm90) Restore original configuration if probe function fails

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The lm90 driver restores the original chip configuration in its exit function.
However, the chip configuration is not restored if the probe function fails.
Restore it there as well.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Guenter Roeck 2012-03-23 10:02:18 +01:00 committed by Jean Delvare
parent ae544f64cc
commit f7001bb063
1 changed files with 13 additions and 8 deletions
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21
drivers/hwmon/lm90.c
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@ -1336,6 +1336,15 @@ static void lm90_remove_files(struct i2c_client *client, struct lm90_data *data)
sysfs_remove_group(&dev->kobj, &lm90_group);
}
static void lm90_restore_conf(struct i2c_client *client, struct lm90_data *data)
{
/* Restore initial configuration */
i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE,
data->convrate_orig);
i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
data->config_orig);
}
static void lm90_init_client(struct i2c_client *client)
{
u8 config, convrate;
@ -1424,7 +1433,7 @@ static int lm90_probe(struct i2c_client *client,
/* Register sysfs hooks */
err = sysfs_create_group(&dev->kobj, &lm90_group);
if (err)
goto exit_free;
goto exit_restore;
if (client->flags & I2C_CLIENT_PEC) {
err = device_create_file(dev, &dev_attr_pec);
if (err)
@ -1463,7 +1472,8 @@ static int lm90_probe(struct i2c_client *client,
exit_remove_files:
lm90_remove_files(client, data);
exit_free:
exit_restore:
lm90_restore_conf(client, data);
kfree(data);
exit:
return err;
@ -1475,12 +1485,7 @@ static int lm90_remove(struct i2c_client *client)
hwmon_device_unregister(data->hwmon_dev);
lm90_remove_files(client, data);
/* Restore initial configuration */
i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE,
data->convrate_orig);
i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
data->config_orig);
lm90_restore_conf(client, data);
kfree(data);
return 0;