linux-kernel - Re: [PATCH net-next v2 0/4] of_get_mac_address ERR

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Message-ID: <AM0PR04MB6434E06E7C43A2C95EB81F42EE310@AM0PR04MB6434.eurprd04.prod.outlook.com>
Date:   Tue, 7 May 2019 12:14:50 +0000
From:   Leonard Crestez <leonard.crestez@....com>
To:     Petr Štetiar <ynezz@...e.cz>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>
CC:     Matthias Brugger <matthias.bgg@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Frank Rowand <frowand.list@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        dl-linux-imx <linux-imx@....com>
Subject: Re: [PATCH net-next v2 0/4] of_get_mac_address ERR_PTR fixes

On 07.05.2019 00:25, Petr Štetiar wrote:
> Hi,
> 
> this patch series is an attempt to fix the mess, I've somehow managed to
> introduce.
> 
> First patch in this series is defacto v5 of the previous 05/10 patch in the
> series, but since the v4 of this 05/10 patch wasn't picked up by the
> patchwork for some unknown reason, this patch wasn't applied with the other
> 9 patches in the series, so I'm resending it as a separate patch of this
> fixup series again.
> 
> Second patch is a result of this rebase against net-next tree, where I was
> checking again all current users of of_get_mac_address and found out, that
> there's new one in DSA, so I've converted this user to the new ERR_PTR
> encoded error value as well.
> 
> Third patch which was sent as v5 wasn't considered for merge, but I still
> think, that we need to check for possible NULL value, thus current IS_ERR
> check isn't sufficient and we need to use IS_ERR_OR_NULL instead.
> 
> Fourth patch fixes warning reported by kbuild test robot.
> 
> Cheers,
> 
> Petr
> 
> Petr Štetiar (4):
>    net: ethernet: support of_get_mac_address new ERR_PTR error
>    net: dsa: support of_get_mac_address new ERR_PTR error
>    staging: octeon-ethernet: Fix of_get_mac_address ERR_PTR check
>    net: usb: smsc: fix warning reported by kbuild test robot

>   drivers/net/ethernet/freescale/fec_main.c             | 2 +-

This fixes netboot on imx (probably all of them).

Tested-by: Leonard Crestez <leonard.crestez@....com>

But shouldn't "support of_get_mac_address new ERR_PTR error" somehow be 
reordered so that it's done before allowing non-null errors from 
of_get_mac_address?

Otherwise it will break bisect for many people.

--
Regards,
Leonard