linux-kernel - Re: [PATCH net-next] net: dsa: qca8k: Initialize the switch with correct number of ports

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Message-ID: <20191024135851.GB30147@lunn.ch>
Date:   Thu, 24 Oct 2019 15:58:51 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Michal Vokáč <michal.vokac@...ft.com>
Cc:     Vivien Didelot <vivien.didelot@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] net: dsa: qca8k: Initialize the switch with
 correct number of ports

On Thu, Oct 24, 2019 at 03:46:58PM +0200, Michal Vokáč wrote:
> Since commit 0394a63acfe2 ("net: dsa: enable and disable all ports")
> the dsa core disables all unused ports of a switch. In this case
> disabling ports with numbers higher than QCA8K_NUM_PORTS causes that
> some switch registers are overwritten with incorrect content.
> 
> To fix this, initialize the dsa_switch->num_ports with correct number
> of ports.
> 
> Fixes: 7e99e3470172 ("net: dsa: remove dsa_switch_alloc helper")
> Signed-off-by: Michal Vokáč <michal.vokac@...ft.com>

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

    Andrew