netdev - Re: [PATCH 1/2 net-next] net: dsa: qca8k: fix an endian bug in qca8k_get_ethtool

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Message-ID: <20210609134456.mim3to3tmns7a2lz@skbuf>
Date:   Wed, 9 Jun 2021 16:44:56 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Yang Yingliang <yangyingliang@...wei.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 1/2 net-next] net: dsa: qca8k: fix an endian bug in
 qca8k_get_ethtool_stats()

On Wed, Jun 09, 2021 at 12:52:12PM +0300, Dan Carpenter wrote:
> The "hi" variable is a u64 but the qca8k_read() writes to the top 32
> bits of it.  That will work on little endian systems but it's a bit
> subtle.  It's cleaner to make declare "hi" as a u32.  We will still need
> to cast it when we shift it later on in the function but that's fine.
> 
> Fixes: 7c9896e37807 ("net: dsa: qca8k: check return value of read functions correctly")
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
> ---

Reviewed-by: Vladimir Oltean <olteanv@...il.com>