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hwmon: (gpio-fan) Fix fan_ctrl_init error path 

In current implementation, the sysfs entries is not removed before return -ENODEV.

Creating the sysfs attribute should be the last thing done by the function,
after all the rest has been successful.
Otherwise there is a small window during which user-space can access the attribute
but the driver isn't ready to deal with the requests.

Fix it by moving sysfs_create_group to be the last thing done by the function.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Simon Guinot <sguinot@lacie.com>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
This commit is contained in:
Axel Lin 2010-11-09 08:41:48 +00:00 committed by Guenter Roeck
parent f0030d87be
commit 4f5b7994f0
1 changed files with 4 additions and 4 deletions
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8
drivers/hwmon/gpio-fan.c
View File

@ -376,10 +376,6 @@ static int fan_ctrl_init(struct gpio_fan_data *fan_data,
}
}
err = sysfs_create_group(&pdev->dev.kobj, &gpio_fan_ctrl_group);
if (err)
goto err_free_gpio;
fan_data->num_ctrl = num_ctrl;
fan_data->ctrl = ctrl;
fan_data->num_speed = pdata->num_speed;
@ -391,6 +387,10 @@ static int fan_ctrl_init(struct gpio_fan_data *fan_data,
goto err_free_gpio;
}
err = sysfs_create_group(&pdev->dev.kobj, &gpio_fan_ctrl_group);
if (err)
goto err_free_gpio;
return 0;
err_free_gpio: