diff options
| author | Axel Lin <axel.lin@gmail.com> | 2010-11-09 08:41:48 +0000 |
|---|---|---|
| committer | Guenter Roeck <guenter.roeck@ericsson.com> | 2010-11-11 09:43:51 -0800 |
| commit | 4f5b7994f0610fefff0782227ab71469ece54a5b (patch) | |
| tree | 15469190314d8eabd4d15370d57222348f896c74 | |
| parent | f0030d87be3cb2eb9eac633d09cb5d9f107ed0c6 (diff) | |
| download | lwn-4f5b7994f0610fefff0782227ab71469ece54a5b.tar.gz lwn-4f5b7994f0610fefff0782227ab71469ece54a5b.zip | |
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>
| -rw-r--r-- | drivers/hwmon/gpio-fan.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/hwmon/gpio-fan.c b/drivers/hwmon/gpio-fan.c index aa701a183707..f141a1de519c 100644 --- a/drivers/hwmon/gpio-fan.c +++ b/drivers/hwmon/gpio-fan.c @@ -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: |