linux-kernel - Re: [PATCH 1/2]drivers/usb/core/sysfs.c Fix variable 'retval' set but not used

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Date:	Tue, 03 Aug 2010 07:28:25 -0400
From:	Valdis.Kletnieks@...edu
To:	"Justin P. Mattock" <justinmattock@...il.com>
Cc:	linux-usb@...r.kernel.org, dbrownell@...rs.sourceforge.net,
	gregkh@...e.de, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2]drivers/usb/core/sysfs.c Fix variable 'retval' set but not used

On Mon, 02 Aug 2010 21:26:28 PDT, "Justin P. Mattock" said:
> diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c

>  	if (alt->string)
> -		retval = device_create_file(&intf->dev, &dev_attr_interface);
> +		device_create_file(&intf->dev, &dev_attr_interface);
>  	intf->sysfs_files_created = 1;
>  	return 0;

What should the code do if device_create_file() manages to fail? Yes, ignoring
the return value is one option, but is it the best one?  'return ret;' might be
another one. Somebody who understands this code and has more caffeine than me
should look this over.

(Nothing personal Justin - it's just my opinion that *anytime* we have a patch
that remove a check for a return code, it needs to justify that ignoring the
return code is appropriate).

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