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Date:   Thu, 24 Dec 2020 13:21:36 -0800
From:   Richard Cochran <>
To:     Grygorii Strashko <>
Cc:     "David S. Miller" <>,,
        Jakub Kicinski <>,,
        Vignesh Raghavendra <>,
        Lokesh Vutla <>
Subject: Re: [PATCH net] net: ethernet: ti: cpts: fix ethtool output when no
 ptp_clock registered

On Thu, Dec 24, 2020 at 06:24:05PM +0200, Grygorii Strashko wrote:
> The CPTS driver registers PTP PHC clock when first netif is going up and
> unregister it when all netif are down. Now ethtool will show:
>  - PTP PHC clock index 0 after boot until first netif is up;
>  - the last assigned PTP PHC clock index even if PTP PHC clock is not
> registered any more after all netifs are down.
> This patch ensures that -1 is returned by ethtool when PTP PHC clock is not
> registered any more.
> Fixes: 8a2c9a5ab4b9 ("net: ethernet: ti: cpts: rework initialization/deinitialization")
> Signed-off-by: Grygorii Strashko <>

Acked-by: Richard Cochran <>

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