linux-kernel - Re: [PATCH 5/9] usb: fix empty-body warning in sysfs.c

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Message-ID: <3998d056-e115-4e36-2705-eea132cce7de@infradead.org>
Date:   Sat, 18 Apr 2020 11:46:32 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     linux-kernel@...r.kernel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        linux-fsdevel@...r.kernel.org,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        linux-input@...r.kernel.org, Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org,
        "J. Bruce Fields" <bfields@...ldses.org>,
        Chuck Lever <chuck.lever@...cle.com>,
        linux-nfs@...r.kernel.org,
        Johannes Berg <johannes@...solutions.net>,
        Dan Williams <dan.j.williams@...el.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Dave Jiang <dave.jiang@...el.com>, linux-nvdimm@...ts.01.org,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, target-devel@...r.kernel.org,
        Zzy Wysm <zzy@...wysm.com>
Subject: Re: [PATCH 5/9] usb: fix empty-body warning in sysfs.c

On 4/18/20 11:44 AM, Matthew Wilcox wrote:
> On Sat, Apr 18, 2020 at 11:41:07AM -0700, Randy Dunlap wrote:
>> +++ linux-next-20200327/drivers/usb/core/sysfs.c
>> @@ -1263,7 +1263,7 @@ void usb_create_sysfs_intf_files(struct
>>  	if (!alt->string && !(udev->quirks & USB_QUIRK_CONFIG_INTF_STRINGS))
>>  		alt->string = usb_cache_string(udev, alt->desc.iInterface);
>>  	if (alt->string && device_create_file(&intf->dev, &dev_attr_interface))
>> -		;	/* We don't actually care if the function fails. */
>> +		do_empty(); /* We don't actually care if the function fails. */
>>  	intf->sysfs_files_created = 1;
>>  }
> 
> Why not just?
> 
> +	if (alt->string)
> +		device_create_file(&intf->dev, &dev_attr_interface);
> 

Yes, looks good. Thanks.

-- 
~Randy