From: Kurt Kanzenbach <kurt@linutronix.de>
To: Vladimir Oltean <olteanv@gmail.com>
Cc: Andrew Lunn <andrew@lunn.ch>,
Vivien Didelot <vivien.didelot@gmail.com>,
Florian Fainelli <f.fainelli@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
netdev@vger.kernel.org, Rob Herring <robh+dt@kernel.org>,
devicetree@vger.kernel.org,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Richard Cochran <richardcochran@gmail.com>,
Kamil Alkhouri <kamil.alkhouri@hs-offenburg.de>,
ilias.apalodimas@linaro.org
Subject: Re: [PATCH net-next v6 4/7] net: dsa: hellcreek: Add support for hardware timestamping
Date: Tue, 06 Oct 2020 15:56:31 +0200 [thread overview]
Message-ID: <87r1qb790w.fsf@kurt> (raw)
In-Reply-To: <20201006133222.74w3r2jwwhq5uop5@skbuf>
[-- Attachment #1: Type: text/plain, Size: 623 bytes --]
On Tue Oct 06 2020, Vladimir Oltean wrote:
> On Tue, Oct 06, 2020 at 03:30:36PM +0200, Kurt Kanzenbach wrote:
>> That's the point. The user (or anybody else) cannot disable hardware
>> stamping, because it is always performed. So, why should it be allowed
>> to disable it even when it cannot be disabled?
>
> Because your driver's user can attach a PTP PHY to your switch port, and
> the network stack doesn't support multiple TX timestamps attached to the
> same skb. They'll want the TX timestamp from the PHY and not from your
> switch.
Yeah, sure. That use case makes sense. What's the problem exactly?
Thanks,
Kurt
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 832 bytes --]
next prev parent reply other threads:[~2020-10-06 13:56 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-04 11:29 [PATCH net-next v6 0/7] Hirschmann Hellcreek DSA driver Kurt Kanzenbach
2020-10-04 11:29 ` [PATCH net-next v6 1/7] net: dsa: Add tag handling for Hirschmann Hellcreek switches Kurt Kanzenbach
2020-10-04 11:56 ` Vladimir Oltean
2020-10-05 6:14 ` Kurt Kanzenbach
2020-10-04 11:29 ` [PATCH net-next v6 2/7] net: dsa: Add DSA driver " Kurt Kanzenbach
2020-10-04 12:56 ` Vladimir Oltean
2020-10-06 6:09 ` Kurt Kanzenbach
2020-10-06 9:20 ` Vladimir Oltean
2020-10-06 10:13 ` Kurt Kanzenbach
2020-10-06 11:32 ` Vladimir Oltean
2020-10-06 12:37 ` Vladimir Oltean
2020-10-06 13:23 ` Kurt Kanzenbach
2020-10-06 13:42 ` Vladimir Oltean
2020-10-06 14:05 ` Kurt Kanzenbach
2020-10-06 14:10 ` Vladimir Oltean
2020-10-06 13:56 ` Vladimir Oltean
2020-10-06 14:13 ` Kurt Kanzenbach
2020-10-11 12:29 ` Kurt Kanzenbach
2020-10-11 15:30 ` Vladimir Oltean
2020-10-12 5:37 ` Kurt Kanzenbach
2020-10-16 12:11 ` Kurt Kanzenbach
2020-10-16 15:43 ` Vladimir Oltean
2020-10-16 16:56 ` Florian Fainelli
2020-10-17 10:06 ` Kurt Kanzenbach
2020-10-17 15:57 ` Vladimir Oltean
2020-10-08 11:49 ` Vladimir Oltean
2020-10-09 5:58 ` Kurt Kanzenbach
2020-10-04 11:29 ` [PATCH net-next v6 3/7] net: dsa: hellcreek: Add PTP clock support Kurt Kanzenbach
2020-10-04 11:29 ` [PATCH net-next v6 4/7] net: dsa: hellcreek: Add support for hardware timestamping Kurt Kanzenbach
2020-10-04 14:30 ` Vladimir Oltean
2020-10-06 6:27 ` Kurt Kanzenbach
2020-10-06 7:28 ` Vladimir Oltean
2020-10-06 13:30 ` Kurt Kanzenbach
2020-10-06 13:32 ` Vladimir Oltean
2020-10-06 13:56 ` Kurt Kanzenbach [this message]
2020-10-06 14:01 ` Vladimir Oltean
2020-10-07 10:39 ` Kurt Kanzenbach
2020-10-07 10:54 ` Vladimir Oltean
2020-10-08 8:34 ` Kurt Kanzenbach
2020-10-08 9:44 ` Vladimir Oltean
2020-10-08 10:01 ` Kurt Kanzenbach
2020-10-08 12:55 ` Kamil Alkhouri
2020-10-08 15:09 ` Vladimir Oltean
2020-10-12 12:53 ` Kamil Alkhouri
2020-10-12 21:42 ` Richard Cochran
2020-10-14 9:57 ` Vladimir Oltean
2020-10-14 11:01 ` Richard Cochran
2020-10-14 11:37 ` Kurt Kanzenbach
2020-10-04 11:29 ` [PATCH net-next v6 5/7] net: dsa: hellcreek: Add PTP status LEDs Kurt Kanzenbach
2020-10-04 11:29 ` [PATCH net-next v6 6/7] dt-bindings: Add vendor prefix for Hirschmann Kurt Kanzenbach
2020-10-04 11:29 ` [PATCH net-next v6 7/7] dt-bindings: net: dsa: Add documentation for Hellcreek switches Kurt Kanzenbach
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87r1qb790w.fsf@kurt \
--to=kurt@linutronix.de \
--cc=andrew@lunn.ch \
--cc=bigeasy@linutronix.de \
--cc=davem@davemloft.net \
--cc=devicetree@vger.kernel.org \
--cc=f.fainelli@gmail.com \
--cc=ilias.apalodimas@linaro.org \
--cc=kamil.alkhouri@hs-offenburg.de \
--cc=kuba@kernel.org \
--cc=netdev@vger.kernel.org \
--cc=olteanv@gmail.com \
--cc=richardcochran@gmail.com \
--cc=robh+dt@kernel.org \
--cc=vivien.didelot@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).