netdev - Re: [PATCH 1/1] ax88172a: fix ax88172a

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Date:   Tue, 14 Jul 2020 14:03:23 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     dan.carpenter@...cle.com
Cc:     george.kennedy@...cle.com, kuba@...nel.org,
        dhaval.giani@...cle.com, netdev@...r.kernel.org
Subject: Re: [PATCH 1/1] ax88172a: fix ax88172a_unbind() failures

From: Dan Carpenter <dan.carpenter@...cle.com>
Date: Tue, 14 Jul 2020 11:00:38 +0300

> On Mon, Jul 13, 2020 at 05:08:59PM -0700, David Miller wrote:
>> From: George Kennedy <george.kennedy@...cle.com>
>> Date: Mon, 13 Jul 2020 07:58:57 -0400
>> 
>> > @@ -237,6 +237,8 @@ static int ax88172a_bind(struct usbnet *dev, struct usb_interface *intf)
>> >  
>> >  free:
>> >  	kfree(priv);
>> > +	if (ret >= 0)
>> > +		ret = -EIO;
>> >  	return ret;
>> 
>> Success paths reach here, so ">= 0" is not appropriate.  Maybe you
>> meant "> 0"?
> 
> No, the success path is the "return 0;" one line before the start of the
> diff.  This is always a failure path.

Is zero ever a possibility, therefore?

You have two cases, one with an explicit -EIO and another which jumps
here "if (ret)"

So it seems the answer is no.