linux-kernel - RE: [EXT] Re: [PATCH v11 net-next 15/15] net: mvpp2: add TX FC firmware check

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Message-ID: <CO6PR18MB3873EB4FE57E1D35531AB5AFB08D9@CO6PR18MB3873.namprd18.prod.outlook.com>
Date:   Wed, 10 Feb 2021 09:05:24 +0000
From:   Stefan Chulski <stefanc@...vell.com>
To:     Russell King - ARM Linux admin <linux@...linux.org.uk>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "thomas.petazzoni@...tlin.com" <thomas.petazzoni@...tlin.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        Nadav Haklai <nadavh@...vell.com>,
        Yan Markman <ymarkman@...vell.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "mw@...ihalf.com" <mw@...ihalf.com>,
        "andrew@...n.ch" <andrew@...n.ch>,
        "atenart@...nel.org" <atenart@...nel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "sebastian.hesselbarth@...il.com" <sebastian.hesselbarth@...il.com>,
        "gregory.clement@...tlin.com" <gregory.clement@...tlin.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: RE: [EXT] Re: [PATCH v11 net-next 15/15] net: mvpp2: add TX FC
 firmware check

> >  	if (priv->global_tx_fc && priv->hw_version != MVPP21) {
> > -		val = mvpp2_cm3_read(priv, MSS_FC_COM_REG);
> > -		val |= FLOW_CONTROL_ENABLE_BIT;
> > -		mvpp2_cm3_write(priv, MSS_FC_COM_REG, val);
> > +		err = mvpp2_enable_global_fc(priv);
> > +		if (err) {
> > +			dev_warn(&pdev->dev, "CM3 firmware not running,
> version should be higher than 18.09 ");
> > +			dev_warn(&pdev->dev, "and chip revision B0\n");
> > +			dev_warn(&pdev->dev, "Flow control not
> supported\n");
> 
> I would much rather this was:
> 
> 			dev_warn(&pdev->dev, "Minimum of CM3 firmware
> 18.09 and chip revision B0 required for flow control\n");
> 
> rather than trying to split it across several kernel messages.

I would repots v12 with this change soon.

Thanks,
Stefan.