netdev - Re: [PATCH net v2] net: dsa: microchip: fix PTP config failure when using multiple ports

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Message-ID: <ab474f83-aaba-4fe9-b6b7-17be2b075391@lunn.ch>
Date: Sat, 17 Aug 2024 20:57:18 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Martin Whitaker <foss@...tin-whitaker.me.uk>
Cc: netdev@...r.kernel.org, UNGLinuxDriver@...rochip.com,
	Woojung.Huh@...rochip.com, ceggers@...i.de,
	arun.ramadoss@...rochip.com
Subject: Re: [PATCH net v2] net: dsa: microchip: fix PTP config failure when
 using multiple ports

On Sat, Aug 17, 2024 at 10:41:41AM +0100, Martin Whitaker wrote:
> When performing the port_hwtstamp_set operation, ptp_schedule_worker()
> will be called if hardware timestamoing is enabled on any of the ports.
> When using multiple ports for PTP, port_hwtstamp_set is executed for
> each port. When called for the first time ptp_schedule_worker() returns
> 0. On subsequent calls it returns 1, indicating the worker is already
> scheduled. Currently the ksz driver treats 1 as an error and fails to
> complete the port_hwtstamp_set operation, thus leaving the timestamping
> configuration for those ports unchanged.
> 
> This patch fixes this by ignoring the ptp_schedule_worker() return
> value.
> 
> Link: https://lore.kernel.org/netdev/7aae307a-35ca-4209-a850-7b2749d40f90@martin-whitaker.me.uk/
> Fixes: bb01ad30570b0 ("net: dsa: microchip: ptp: manipulating absolute time using ptp hw clock")
> Signed-off-by: Martin Whitaker <foss@...tin-whitaker.me.uk>
> Cc: stable@...ble@...r.kernel.org

One stable@ is sufficient. Did i mess that up when i asked you to add
it?

Apart from that:

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

It is better to put your Signed-off-by last, because each Maintainer
handling the patch appends there own. So it keeps them together. But
there is no need to repost.

    Andrew