linux-kernel - Re: [PATCH] net: phy: mdio_bus: add missing device_del() in mdiobus

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Date:   Wed, 16 Jan 2019 16:44:39 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        "David S . Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Subject: Re: [PATCH] net: phy: mdio_bus: add missing device_del() in
 mdiobus_register() error handling

On Wed, Jan 16, 2019 at 04:18:55PM +0100, Thomas Petazzoni wrote:
> Hello,
> 
> On Wed, 16 Jan 2019 15:48:29 +0100, Andrew Lunn wrote:
> 
> > Reviewed-by: Andrew Lunn <andrew@...n.ch>
> > 
> > However, i wounder if it makes sense to add a label before the
> > existing device_del() at the end of the function, and convert this,
> > and the case above into a goto? That might scale better, avoiding the
> > same issue in the future?
> 
> That's another option indeed.
> 
> Hmm, now that I looked at it, I think we should use device_unregister()
> instead. device_unregister() does both device_del() and put_device().

Hi Thomas

device_unregister() does seem symmetrical with device_register() which
is what we are trying to undo.

   Andrew