netdev - Re: [PATCH 1/2] net: dsa: ksz: pad frame to 64 bytes for transmission

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Message-ID: <20201129193822.GP2234159@lunn.ch>
Date:   Sun, 29 Nov 2020 20:38:22 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Jean Pihet <jean.pihet@...oldbits.com>
Cc:     netdev@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
        Ryan Barnett <ryan.barnett@...kwellcollins.com>,
        Conrad Ratschan <conrad.ratschan@...kwellcollins.com>,
        Hugo Cornelis <hugo.cornelis@...ensium.com>,
        Arnout Vandecappelle <arnout.vandecappelle@...ensium.com>
Subject: Re: [PATCH 1/2] net: dsa: ksz: pad frame to 64 bytes for transmission

On Sun, Nov 29, 2020 at 08:34:27PM +0100, Jean Pihet wrote:
> Hi Andrew,
> 
> On Sun, Nov 29, 2020 at 5:56 PM Andrew Lunn <andrew@...n.ch> wrote:
> >
> > On Sun, Nov 29, 2020 at 11:23:59AM +0100, Jean Pihet wrote:
> > > Some ethernet controllers (e.g. TI CPSW) pad the frames to a minimum
> > > of 64 bytes before the FCS is appended. This causes an issue with the
> > > KSZ tail tag which could not be the last byte before the FCS.
> > > Solve this by padding the frame to 64 bytes minus the tail tag size,
> > > before the tail tag is added and the frame is passed for transmission.
> >
> > Hi Jean
> >
> > what tree is this based on? Have you seen
> The patches are based on the latest mainline v5.10-rc5. Is this the
> recommended version to submit new patches?

No, that is old. Please take a read of:

https://www.kernel.org/doc/html/latest/networking/netdev-FAQ.html

	Andrew