linux-kernel - Re: [net PATCH 1/2] net: dsa: qca8k: fix inband mgmt for big-endian systems

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Date:   Wed, 12 Oct 2022 14:31:19 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Christian Marangi <ansuelsmth@...il.com>
Cc:     Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Pawel Dembicki <paweldembicki@...il.com>,
        Lech Perczak <lech.perczak@...il.com>
Subject: Re: [net PATCH 1/2] net: dsa: qca8k: fix inband mgmt for big-endian
 systems

On Mon, Oct 10, 2022 at 01:14:58PM +0200, Christian Marangi wrote:
> The header and the data of the skb for the inband mgmt requires
> to be in little-endian. This is problematic for big-endian system
> as the mgmt header is written in the cpu byte order.
> 
> Fix this by converting each value for the mgmt header and data to
> little-endian, and convert to cpu byte order the mgmt header and
> data sent by the switch.
> 
> Fixes: 5950c7c0a68c ("net: dsa: qca8k: add support for mgmt read/write in Ethernet packet")
> Tested-by: Pawel Dembicki <paweldembicki@...il.com>
> Tested-by: Lech Perczak <lech.perczak@...il.com>
> Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
> Reviewed-by: Lech Perczak <lech.perczak@...il.com>

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew