linux-kernel - Re: [PATCH] drivers: firmware: edd: fixed coding style errors

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Date:	Sun, 22 Dec 2013 14:13:39 -0800
From:	Joe Perches <joe@...ches.com>
To:	Derek Perrin <d.roc16@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drivers: firmware: edd: fixed coding style errors

On Sun, 2013-12-22 at 15:17 -0600, Derek Perrin wrote:
> Fixed coding style errors. Spaces, tab and parenthesis errors.

There's a real error in this patch.

When you do whitespace only changes, please
verify that the old and new object files produced
are unchanged.

One trivial bit too,

> diff --git a/drivers/firmware/edd.c b/drivers/firmware/edd.c
[]
> @@ -62,8 +62,8 @@ struct edd_device {
>  
>  struct edd_attribute {
>  	struct attribute attr;
> -	ssize_t(*show) (struct edd_device * edev, char *buf);
> -	int (*test) (struct edd_device * edev);
> +	ssize_t(*show) (struct edd_device *edev, char *buf);
> +	int (*test) (struct edd_device *edev);

I think most prefer function pointer prototypes like:

	size_t (*show)(struct edd_device *edev, char *buf);
	int (*test)(struct edd_device *edev);

> @@ -791,7 +791,7 @@ edd_exit(void)
>  	struct edd_device *edev;
>  
>  	for (i = 0; i < edd_num_devices(); i++) {
> -		if ((edev = edd_devices[i]))
> +		if ((edev == edd_devices[i]))
>  			edd_device_unregister(edev);
>  	}
>  	kset_unregister(edd_kset);

This is wrong.
It's an assignment in the block and it's important.

This could be rewritten as:

	for (i = 0; i < edd_num_devices(); i++) {
		edev = edd_devices[i];
		if (edev)
			edd_device_unregister(edev);
	}

or just remove the temporary.

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