netdev - Re: [net-next v3 7/7] renesas: reject unsupported external timestamp flags

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Message-ID: <20191012183838.GH3165@localhost>
Date:   Sat, 12 Oct 2019 11:38:38 -0700
From:   Richard Cochran <richardcochran@...il.com>
To:     Jacob Keller <jacob.e.keller@...el.com>
Cc:     netdev@...r.kernel.org,
        Intel Wired LAN <intel-wired-lan@...ts.osuosl.org>,
        Jeffrey Kirsher <jeffrey.t.kirsher@...el.com>,
        Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
Subject: Re: [net-next v3 7/7] renesas: reject unsupported external timestamp
 flags

On Thu, Sep 26, 2019 at 11:11:09AM -0700, Jacob Keller wrote:
> Fix the renesas PTP support to explicitly reject any future flags that
> get added to the external timestamp request ioctl.
> 
> In order to maintain currently functioning code, this patch accepts all
> three current flags. This is because the PTP_RISING_EDGE and
> PTP_FALLING_EDGE flags have unclear semantics and each driver seems to
> have interpreted them slightly differently.

This driver doesn't check the flags. Not knowing this HW, I can't say
which edges are time stamped.
 
> Cc: Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
> Signed-off-by: Jacob Keller <jacob.e.keller@...el.com>

Reviewed-by: Richard Cochran <richardcochran@...il.com>