netdev - RE: [Intel-wired-lan] [net-next v3 5/7] igb: reject unsupported external timestamp flags

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Date:   Fri, 11 Oct 2019 00:57:52 +0000
From:   "Brown, Aaron F" <aaron.f.brown@...el.com>
To:     "Keller, Jacob E" <jacob.e.keller@...el.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     Intel Wired LAN <intel-wired-lan@...ts.osuosl.org>
Subject: RE: [Intel-wired-lan] [net-next v3 5/7] igb: reject unsupported
 external timestamp flags

> From: Intel-wired-lan [mailto:intel-wired-lan-bounces@...osl.org] On Behalf Of
> Jacob Keller
> Sent: Thursday, September 26, 2019 11:11 AM
> To: netdev@...r.kernel.org
> Cc: Intel Wired LAN <intel-wired-lan@...ts.osuosl.org>
> Subject: [Intel-wired-lan] [net-next v3 5/7] igb: reject unsupported external
> timestamp flags
> 
> Fix the igb 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.
> 
> Signed-off-by: Jacob Keller <jacob.e.keller@...el.com>
> ---
>  drivers/net/ethernet/intel/igb/igb_ptp.c | 6 ++++++
>  1 file changed, 6 insertions(+)

Tested-by: Aaron Brown <aaron.f.brown@...el.com>