netdev - Re: [PATCH 1/3] net: mvpp2: tai: add refcount for ptp worker

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Date:   Tue, 18 Apr 2023 02:08:15 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Shmuel Hazan <shmuel.h@...lu.com>
Cc:     Russell King <linux@...linux.org.uk>,
        Marcin Wojtas <mw@...ihalf.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Richard Cochran <richardcochran@...il.com>,
        horatiu.vultur@...rochip.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] net: mvpp2: tai: add refcount for ptp worker

On Mon, Apr 17, 2023 at 07:01:49PM +0300, Shmuel Hazan wrote:
> In some configurations, a single TAI can be responsible for multiple
> mvpp2 interfaces. However, the mvpp2 driver will call mvpp22_tai_stop
> and mvpp22_tai_start per interface RX timestamp disable/enable.
> 
> As a result, disabling timestamping for one interface would stop the
> worker and corrupt the other interface's RX timestamps.
> 
> This commit solves the issue by introducing a simpler ref count for each
> TAI instance.

This is version 2, so you should add that to the subject line.  You
should also indicate what changed since the previous version.

Please read https://www.kernel.org/doc/html/latest/process/maintainer-netdev.html

You have added Fixes: tags, so you think this is a fix for stable? You
then should indicate this on the Subject line.
 
> Fixes: ce3497e2072e ("net: mvpp2: ptp: add support for receive timestamping")
> Signed-off-by: Shmuel Hazan <shmuel.h@...lu.com>

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew