linux-kernel - Re: [PATCH v3 net-next 06/10] net: dsa: microchip: add support for phylink management

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Message-ID: <1ce139ac7eb4cb85c6cdb898545ba76729ac927b.camel@microchip.com>
Date:   Tue, 3 Aug 2021 22:34:55 +0530
From:   Prasanna Vengateshan <prasanna.vengateshan@...rochip.com>
To:     Vladimir Oltean <olteanv@...il.com>
CC:     <andrew@...n.ch>, <netdev@...r.kernel.org>, <robh+dt@...nel.org>,
        <UNGLinuxDriver@...rochip.com>, <Woojung.Huh@...rochip.com>,
        <hkallweit1@...il.com>, <linux@...linux.org.uk>,
        <davem@...emloft.net>, <kuba@...nel.org>,
        <linux-kernel@...r.kernel.org>, <vivien.didelot@...il.com>,
        <f.fainelli@...il.com>, <devicetree@...r.kernel.org>
Subject: Re: [PATCH v3 net-next 06/10] net: dsa: microchip: add support for
 phylink management

On Sat, 2021-07-31 at 18:27 +0300, Vladimir Oltean wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the
> content is safe
> 
> On Fri, Jul 23, 2021 at 11:01:04PM +0530, Prasanna Vengateshan wrote:
> > +static void lan937x_phylink_validate(struct dsa_switch *ds, int port,
> > +                                  unsigned long *supported,
> > +                                  struct phylink_link_state *state)
> > +{
> > +     struct ksz_device *dev = ds->priv;
> > +     __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
> > +
> > +     /* Check for unsupported interfaces */
> > +     if (!phy_interface_mode_is_rgmii(state->interface) &&
> > +         state->interface != PHY_INTERFACE_MODE_RMII &&
> > +         state->interface != PHY_INTERFACE_MODE_MII &&
> > +         state->interface != PHY_INTERFACE_MODE_INTERNAL) {
> 
> According to include/linux/phylink.h, when phylink passes
> state->interface == PHY_INTERFACE_MODE_NA, you are expected to return
> all supported link modes.

Okay, Noted. i think PHY_INTERFACE_MODE_NA check should be added in all of the
'if' (==) checks down to the above one and including the above one (!=).