netdev - Re: [Intel-wired-lan] [PATCH net-next v3 1/6] igb: clear out tstamp after sending the packet.

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Message-ID: <309B89C4C689E141A5FF6A0C5FB2118B970B1283@ORSMSX103.amr.corp.intel.com>
Date:   Fri, 21 Jun 2019 01:50:42 +0000
From:   "Brown, Aaron F" <aaron.f.brown@...el.com>
To:     "Patel, Vedang" <vedang.patel@...el.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     "jiri@...nulli.us" <jiri@...nulli.us>,
        "l@...ileo.org" <l@...ileo.org>,
        "jhs@...atatu.com" <jhs@...atatu.com>,
        "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
        "xiyou.wangcong@...il.com" <xiyou.wangcong@...il.com>,
        "davem@...emloft.net" <davem@...emloft.net>
Subject: Re: [Intel-wired-lan] [PATCH net-next v3 1/6] igb: clear out tstamp
 after sending the packet.

On Mon, 2019-06-17 at 12:31 -0700, Vedang Patel wrote:
> skb->tstamp is being used at multiple places. On the transmit side, it
> is used to determine the launchtime of the packet. It is also used to
> determine the software timestamp after the packet has been transmitted.
> 
> So, clear out the tstamp value after it has been read so that we do not
> report false software timestamp on the receive side.
> 
> Signed-off-by: Vedang Patel <vedang.patel@...el.com>
> ---
>  drivers/net/ethernet/intel/igb/igb_main.c | 1 +
>  1 file changed, 1 insertion(+)
> 

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