linux-kernel - Re: [lm-sensors] [RFC][PATCH] hwmon:fix sparse warnings + error handling

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Message-Id: <20060821100416.4d356328.khali@linux-fr.org>
Date:	Mon, 21 Aug 2006 10:04:16 +0200
From:	Jean Delvare <khali@...ux-fr.org>
To:	Michal Piotrowski <michal.k.k.piotrowski@...il.com>
Cc:	Andrew Morton <akpm@...l.org>, lm-sensors@...sensors.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [lm-sensors] [RFC][PATCH] hwmon:fix sparse warnings + error
 handling

> --- linux-work-clean/drivers/hwmon/w83627hf.c	2006-08-20 22:02:40.000000000 +0200
> +++ linux-work/drivers/hwmon/w83627hf.c	2006-08-20 22:27:14.000000000 +0200
> @@ -513,9 +513,21 @@ static DEVICE_ATTR(in0_max, S_IRUGO | S_
> 
>  #define device_create_file_in(client, offset) \
>  do { \
> -device_create_file(&client->dev, &dev_attr_in##offset##_input); \
> -device_create_file(&client->dev, &dev_attr_in##offset##_min); \
> -device_create_file(&client->dev, &dev_attr_in##offset##_max); \
> +	err = device_create_file(&client->dev, &dev_attr_in##offset##_input); \
> +	if (err) {\
> +		hwmon_device_unregister(data->class_dev); \
> +		return err; \
> +	} \
> +	err = device_create_file(&client->dev, &dev_attr_in##offset##_min); \
> +	if (err) {\
> +		hwmon_device_unregister(data->class_dev); \
> +		return err; \
> +	} \
> +	err = device_create_file(&client->dev, &dev_attr_in##offset##_max); \
> +	if (err) {\
> +		hwmon_device_unregister(data->class_dev); \
> +		return err; \
> +	} \
>  } while (0)

_Never_ use "return" in a macro. It's way too confusing for whoever will
read the code later.

-- 
Jean Delvare
-
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