netdev - Re: [PATCH net-next v2 5/5] net-next: dsa: add dsa support for Mediatek MT7530 switch

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1490681113.14184.39.camel@mtkswgap22>
Date:   Tue, 28 Mar 2017 14:05:13 +0800
From:   Sean Wang <sean.wang@...iatek.com>
To:     Andrew Lunn <andrew@...n.ch>
CC:     <f.fainelli@...il.com>, <vivien.didelot@...oirfairelinux.com>,
        <matthias.bgg@...il.com>, <robh+dt@...nel.org>,
        <mark.rutland@....com>, <devicetree@...r.kernel.org>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>, <davem@...emloft.net>,
        <Landen.Chao@...iatek.com>, <keyhaede@...il.com>,
        <objelf@...il.com>
Subject: Re: [PATCH net-next v2 5/5] net-next: dsa: add dsa support for
 Mediatek MT7530 switch


Hi Andrew,

Add comment as below inline


On Fri, 2017-03-24 at 15:02 +0100, Andrew Lunn wrote:
> Hi Sean
> 
> > +	regmap = devm_regmap_init(ds->dev, NULL, priv,
> > +				  &mt7530_regmap_config);
> > +	if (IS_ERR(regmap))
> > +		dev_warn(priv->dev, "phy regmap initialization failed");
> > +
> 
> Shouldn't this be a fatal error? If you keep going when there is an
> error, what happens when you actually try to use the regmap?
> 

Initial thought is that it is just for debugging purpose so if it fails,
it should break any functionality of switch and only have implication as
a warning message. 

Anyway, i will remove it in the next one since it seems better being
kept in private place as you suggested in the previous mail.  

> > +	phy_mode = of_get_phy_mode(ds->ports[ds->dst->cpu_port].dn);
> > +	if (phy_mode < 0) {
> > +		dev_err(priv->dev, "Can't find phy-mode for master device\n");
> > +		return phy_mode;
> > +	}
> > +	dev_info(priv->dev, "phy-mode for master device = %x\n", phy_mode);
> 
> dev_dbg? 
> 

Sorry. i forgot turned it into dev_dbg

> > +
> > +	id = mt7530_read(priv, MT7530_CREV);
> > +	id >>= CHIP_NAME_SHIFT;
> > +	if (id != MT7530_ID)
> > +		return -ENODEV;
> 
> It might be helpful to say what ID has been found, if it is not the
> supported ID.


I will fix it up to make users know what was going on 

thanks for taking your time on those reviewing again!


> 	Andrew