linux-kernel - Re: [PATCH 3/5]acpi:glue.c Fix warning: variable 'ret' set but not used

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Date:	Wed, 30 Jun 2010 06:21:58 -0700
From:	"Justin P. Mattock" <justinmattock@...il.com>
To:	David Howells <dhowells@...hat.com>
CC:	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
	lenb@...nel.org
Subject: Re: [PATCH 3/5]acpi:glue.c Fix warning: variable 'ret' set but not
 used

On 06/30/2010 02:13 AM, David Howells wrote:
> Justin P. Mattock<justinmattock@...il.com>  wrote:
>
>>   	if (!ACPI_FAILURE(status)) {
>> -		int ret;
>>
>> -		ret = sysfs_create_link(&dev->kobj,&acpi_dev->dev.kobj,
>> +		fn = sysfs_create_link(&dev->kobj,&acpi_dev->dev.kobj,
>>   				"firmware_node");
>> -		ret = sysfs_create_link(&acpi_dev->dev.kobj,&dev->kobj,
>> +		pn = sysfs_create_link(&acpi_dev->dev.kobj,&dev->kobj,
>>   				"physical_node");
>> +	if (fn) {
>
> That new if-statement still needs indenting one more tab stop.  It's indented
> the same as the previous if-statement, but is actually in the body of that
> previous if-statement.
>
> The body of the second if-statement should be indented one tab beyond the if,
> and else/else-if statements and the final closing brace should be indented
> level with the if:
>
> 	if (...) {
> 		body;
> 	} else if (...) {
> 		body;
> 	} else {
> 		body;
> 	}
>
> so that they line up vertically.

Thanks for the info on this, I really appreciate it. I'll look at this 
today, and resend.
	

>
>> +		dev_warn(dev, "dev:%p Failed to create firmware_node: %d\n",
>> +			acpi_dev, fn);
>
> The "dev:%p " seems like it ought to be superfluous if you're using
> dev_warn(), and certainly, returning the pointer isn't really useful, I
> suspect.
>

I kept receiving an new warning for using acpi_dev the %p was the only 
option I saw in the Documentation that worked

> However, at this point you have two device struct pointers: dev and
> &acip_dev->dev, so printing them both is may be good.  Perhaps something like:
>
> +		dev_warn(&acpi_dev->dev,
> +			 "Failed to create firmware_node link to %s %s: %d\n",
> +			 dev_driver_string(dev), dev_name(dev), fn);
>
> David
>

o.k. I'll look at this today, and see if I can find/locate the device 
name and string for these.

Justin P. Mattock
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