Date:   Fri, 17 Mar 2023 20:57:48 +0000
From:   "Russell King (Oracle)" <linux@armlinux.org.uk>
To:     Andrew Lunn <andrew@lunn.ch>
Cc:     Michael Sit Wei Hong <michael.wei.hong.sit@intel.com>,
        Giuseppe Cavallaro <peppe.cavallaro@st.com>,
        Alexandre Torgue <alexandre.torgue@foss.st.com>,
        Jose Abreu <joabreu@synopsys.com>,
        "David S . Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Maxime Coquelin <mcoquelin.stm32@gmail.com>,
        Ong Boon Leong <boon.leong.ong@intel.com>,
        netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        Looi Hong Aun <hong.aun.looi@intel.com>,
        Voon Weifeng <weifeng.voon@intel.com>,
        Lai Peter Jun Ann <peter.jun.ann.lai@intel.com>
Subject: Re: [PATCH net v2 1/2] net: stmmac: fix PHY handle parsing
Message-ID: <ZBTUTD6RL22pdlmq@shell.armlinux.org.uk>
References: <20230314070208.3703963-1-michael.wei.hong.sit@intel.com>
 <20230314070208.3703963-2-michael.wei.hong.sit@intel.com>
 <10aff941-e18a-4d77-974b-1760529988a6@lunn.ch>
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Sender: Russell King (Oracle) <linux@armlinux.org.uk>
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On Fri, Mar 17, 2023 at 08:56:19PM +0100, Andrew Lunn wrote:
> On Tue, Mar 14, 2023 at 03:02:07PM +0800, Michael Sit Wei Hong wrote:
> > phylink_fwnode_phy_connect returns 0 when set to MLO_AN_INBAND.
> > This causes the PHY handle parsing to skip and the PHY will not be attached
> > to the MAC.
> 
> Please could you expand the commit message because i'm having trouble
> following this.
> 
> phylink_fwnode_phy_connect() says:
> 
> 	/* Fixed links and 802.3z are handled without needing a PHY */
> 	if (pl->cfg_link_an_mode == MLO_AN_FIXED ||
> 	    (pl->cfg_link_an_mode == MLO_AN_INBAND &&
> 	     phy_interface_mode_is_8023z(pl->link_interface)))
> 		return 0;
> 
> So your first statement is not true. It should be MLO_AN_INBAND
> and phy_interface_mode_is_8023z.
> 
> > Add additional check for PHY handle parsing when set to MLO_AN_INBAND.
> 
> Looking at the patch, there is no reference to MLO_AN_INBAND, or
> managed = "in-band-status";

That's the pesky "xpcs_an_inband" which ends up as phylink's
"ovr_an_inband"... I'm sure these are random renames of stuff to make
sure that people struggle to follow the code.

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