linux-kernel - Re: [PATCH net v1 1/2] net: dsa: microchip: fix devicetree parsing of cpu node

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Message-ID: <CAGngYiXdJ=oLe+A034wGL_rjtjSnEw7DhSJ3sE7M9PAAjkZMTQ@mail.gmail.com>
Date:   Tue, 8 Dec 2020 10:33:28 -0500
From:   Sven Van Asbroeck <thesven73@...il.com>
To:     Woojung Huh <woojung.huh@...rochip.com>,
        Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        David S Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     Helmut Grohne <helmut.grohne@...enta.de>,
        netdev <netdev@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net v1 1/2] net: dsa: microchip: fix devicetree parsing of
 cpu node

Andrew, Jakub,

On Sat, Dec 5, 2020 at 10:28 AM Sven Van Asbroeck <thesven73@...il.com> wrote:
>
> From: Sven Van Asbroeck <thesven73@...il.com>
>
> On the ksz8795, if the devicetree contains a cpu node,
> devicetree parsing fails and the whole driver errors out.
>
> Fix the devicetree parsing code by making it use the
> correct number of ports.
>
> Fixes: 912aae27c6af ("net: dsa: microchip: really look for phy-mode in port nodes")
> Tested-by: Sven Van Asbroeck <thesven73@...il.com> # ksz8795
> Signed-off-by: Sven Van Asbroeck <thesven73@...il.com>
> ---

Any chance that this patch could still get merged?
I believe this will work fine on both ksz8795 and ksz9477, even though num_ports
is defined differently, because:

ksz8795:
/* set the real number of ports */
dev->ds->num_ports = dev->port_cnt + 1;
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/net/dsa/microchip/ksz8795.c?h=v5.10-rc7#n1266

ksz9477:
/* set the real number of ports */
dev->ds->num_ports = dev->port_cnt;
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/net/dsa/microchip/ksz9477.c?h=v5.10-rc7#n1585

Would it be possible to merge this into net, so users get working cpu nodes?
I don't think this will prevent you from harmonizing port_cnt in net-next.