netdev - Re: [PATCH v4 3/9] net: dsa: mv88e6xxx: Use generic helper function

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Date:   Wed, 19 Aug 2020 08:00:54 +0200
From:   Kurt Kanzenbach <kurt@...utronix.de>
To:     Russell King - ARM Linux admin <linux@...linux.org.uk>
Cc:     Richard Cochran <richardcochran@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Jiri Pirko <jiri@...lanox.com>,
        Ido Schimmel <idosch@...lanox.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Grygorii Strashko <grygorii.strashko@...com>,
        Samuel Zou <zou_wei@...wei.com>, netdev@...r.kernel.org,
        Petr Machata <petrm@...lanox.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: Re: [PATCH v4 3/9] net: dsa: mv88e6xxx: Use generic helper function

On Tue Aug 18 2020, Russell King - ARM Linux admin wrote:
> On Tue, Aug 18, 2020 at 12:32:45PM +0200, Kurt Kanzenbach wrote:
>> -static int is_pdelay_resp(u8 *msgtype)
>> +static int is_pdelay_resp(const struct ptp_header *hdr)
>>  {
>> -	return (*msgtype & 0xf) == 3;
>> +	return (hdr->tsmt & 0xf) == 3;
>
> Forgive my ignorance about PTPv1, but does PTPv1 have these as well?

pdelay is PTP v2 specific. 

> Is there a reason not to use the helper introduced in patch 2 here?

Yes, it doesn't have to be. This driver only deals with PTP v2.

> Should we have definitions for the message types?

That is something one can think of. At the moment there are not many
users though.

Thanks,
Kurt

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