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From: Thomas Monjalon <thomas@monjalon.net>
To: "Michał Krawczyk" <mk@semihalf.com>
Cc: stable@dpdk.org, Maciej Bielski <mba@semihalf.com>,
	dev@dpdk.org, Marcin Wojtas <mw@semihalf.com>,
	Guy Tzalik <gtzalik@amazon.com>,
	Evgeny Schemeilin <evgenys@amazon.com>,
	Eduard Serra <eduser25@gmail.com>,
	igorc.mail@gmail.com
Subject: Re: [dpdk-stable] [PATCH] net/ena: fix L4 cksum flags condition for TX
Date: Mon, 05 Aug 2019 19:44:25 +0200	[thread overview]
Message-ID: <2289104.F6p8LDoDFh@xps> (raw)
In-Reply-To: <CAJMMOfN02+EeKGjz9OP+aoF368m38rMtdjzkHpg0M1eub86_cw@mail.gmail.com>

01/08/2019 14:08, Michał Krawczyk:
> czw., 1 sie 2019 o 13:45 Maciej Bielski <mba@semihalf.com> napisał(a):
> >
> > During an if-condition evaluation, a 2-bit flag evaluates to 'true' for
> > '0x1', '0x2' and '0x3'. Thus, from this perspective these flags are
> > indistinguishable. To make them distinct, respective bits must be
> > extracted with a mask and then checked for strict equality.
> >
> > Specifically here, even if `PKT_TX_UDP_CKSUM` (value '0x3') was set, the
> > expression `mbuf->ol_flags & PKT_TX_TCP` (the second flag of value
> > '0x1') is evaluated first and the result is 'true'. In consequence, for
> > UDP packets the execution flow enters an incorrect branch.
> >
> > Fixes: 56b8b9b7e5d2 (net/ena: convert to new Tx offloads API)
> > Cc: stable@dpdk.org
> >
> > Signed-off-by: Maciej Bielski <mba@semihalf.com>
> > Reported-by: Eduard Serra <eduser25@gmail.com>
> Acked-by: Michal Krawczyk <mk@semihalf.com>

Applied, thanks




      reply	other threads:[~2019-08-05 17:44 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-01 11:45 Maciej Bielski
2019-08-01 12:08 ` Michał Krawczyk
2019-08-05 17:44   ` Thomas Monjalon [this message]

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