netdev - Re: [PATCH 6/9] net: dsa: marvell: Provide per device information about max frame size

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]

Date:   Mon, 14 Nov 2022 09:52:28 +0100
From:   Lukasz Majewski <lukma@...x.de>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org
Subject: Re: [PATCH 6/9] net: dsa: marvell: Provide per device information
 about max frame size

Hi Andrew,

> On Thu, Nov 10, 2022 at 04:36:37PM +0100, Lukasz Majewski wrote:
> > Hi Andrew,
> >   
> > > On Tue, Nov 08, 2022 at 09:23:27AM +0100, Lukasz Majewski wrote:  
> > > > Different Marvell DSA switches support different size of max
> > > > frame bytes to be sent.
> > > > 
> > > > For example mv88e6185 supports max 1632B, which is now in-driver
> > > > standard value. On the other hand - mv88e6071 supports 2048
> > > > bytes.
> > > > 
> > > > As this value is internal and may be different for each switch
> > > > IC new entry in struct mv88e6xxx_info has been added to store
> > > > it.
> > > > 
> > > > When the 'max_frame_size' is not defined (and hence zeroed by
> > > > the kvzalloc()) the default of 1632 bytes is used.    
> > > 
> > > I would prefer every entry states the value.  
> > 
> > You mean to add it explicitly (i.e. for each supported switch
> > version) to the struct mv88e6xxx_ops ?  
> 
> To the info structure. You added it for just your devices and left it
> to 0 for the rest. Rather than special case 0, always set the value
> and remove the special case. Maybe even -EINVAL if you find a 0 there.
> 

Ok.

>    Andrew


Best regards,

Lukasz Majewski

--

DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma@...x.de

Content of type "application/pgp-signature" skipped