netdev - Re: [Patch net] net: make pskb_trim_rcsum

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Message-ID: <CAM_iQpW8pT7yZ1pTmhNTh1+8yVhd+=mYLCNQ-cvCqPf127qRJA@mail.gmail.com>
Date:   Mon, 29 Oct 2018 19:21:12 -0700
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Eric Dumazet <eric.dumazet@...il.com>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>
Subject: Re: [Patch net] net: make pskb_trim_rcsum_slow() robust

On Mon, Oct 29, 2018 at 7:14 PM Eric Dumazet <eric.dumazet@...il.com> wrote:
>
> Would not it be simpler to set ip_summed to CHECKSUM_NONE (no need to save old_csum) ?

For !CHECKSUM_COMPLETE, ip_summed should be untouched, right?

If you mean only setting to CHECKSUM_NONE for CHECKSUM_COMPLETE case,
the end result may not be simpler.