linux-kernel - Re: [PATCH] hwmon: (gpio-fan) Fix fan_ctrl

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Message-ID: <AANLkTim9mNy+ocftWn0ZiGPyefjhc-eXj3gunFw1Q04s@mail.gmail.com>
Date:	Tue, 9 Nov 2010 16:22:02 +0800
From:	Axel Lin <axel.lin@...il.com>
To:	Jean Delvare <khali@...ux-fr.org>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	Guenter Roeck <guenter.roeck@...csson.com>,
	Simon Guinot <sguinot@...ie.com>, lm-sensors@...sensors.org
Subject: Re: [PATCH] hwmon: (gpio-fan) Fix fan_ctrl_init error path

2010/11/9 Jean Delvare <khali@...ux-fr.org>:
> On Tue, 09 Nov 2010 13:18:39 +0800, Axel Lin wrote:
>> Remove sysfs entries before return -ENODEV.
>>
>> Signed-off-by: Axel Lin <axel.lin@...il.com>
>> ---
>>  drivers/hwmon/gpio-fan.c |    4 +++-
>>  1 files changed, 3 insertions(+), 1 deletions(-)
>>
>> diff --git a/drivers/hwmon/gpio-fan.c b/drivers/hwmon/gpio-fan.c
>> index aa701a1..d2e66b4 100644
>> --- a/drivers/hwmon/gpio-fan.c
>> +++ b/drivers/hwmon/gpio-fan.c
>> @@ -388,11 +388,13 @@ static int fan_ctrl_init(struct gpio_fan_data *fan_data,
>>       fan_data->speed_index = get_fan_speed_index(fan_data);
>>       if (fan_data->speed_index < 0) {
>>               err = -ENODEV;
>> -             goto err_free_gpio;
>> +             goto err_remove_sysfs;
>>       }
>>
>>       return 0;
>>
>> +err_remove_sysfs:
>> +     sysfs_remove_group(&pdev->dev.kobj, &gpio_fan_ctrl_group);
>>  err_free_gpio:
>>       for (i = i - 1; i >= 0; i--)
>>               gpio_free(ctrl[i]);
>
> Oh, and while you're here, fan_alarm_init() needs some love as well.
> There's a "return 0" in the middle which clearly can't be correct.
I think this part is correct. see the comment:
        /*
         * If the alarm GPIO don't support interrupts, just leave
         * without initializing the fail notification support.
         */

Regards,
Axel

>
> --
> Jean Delvare
>
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