From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f66.google.com (mail-wm0-f66.google.com [74.125.82.66]) by dpdk.org (Postfix) with ESMTP id 154231B2C6 for ; Fri, 19 Jan 2018 14:43:28 +0100 (CET) Received: by mail-wm0-f66.google.com with SMTP id b21so3657558wme.4 for ; Fri, 19 Jan 2018 05:43:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=6wind-com.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:content-transfer-encoding:in-reply-to :user-agent; bh=RQkJbZyIc5wlxbWHuTR00Tk7UoR1ZJZ8T8skyjAH3y4=; b=hHoFqlL7ip0ZJpar4EeMMUXtWwV3lFXwzUQUdBVLS7yP+B/sjuJbI2WGO3+KwdDHA0 kFQLWpFxpWqqlh7xcibig0e3q/WeHPwoT+gKUqijhY/sH6ZlEOlZPqtYD2wr3YCmr6Ew hFABJOMvbvC3UJJE3Ho2i9EBWdPAhuVojlsKbmFEcf03LBGYKfNTMzyiXoorGBaFDJc5 UpCwwAboVN0V7fT9W78R2dan7erEoWeebFfjYtI1NekFXZeo6/S0HFh4ZU1cv5OxWVz1 3MkJJcftNYKOwhpuUNJ0oLDweODqCKpC4RETb6dlXJl8m3+mSHXtxPL81yVUjF/Kk6wV 2kjQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:content-transfer-encoding :in-reply-to:user-agent; bh=RQkJbZyIc5wlxbWHuTR00Tk7UoR1ZJZ8T8skyjAH3y4=; b=rB04qcRxqO/0mxBpbuMDOYRL4bAFs+W7ycgWveddgShm0oeQIDqtRluLhp5rLvpDzC 5w6s3Bj/unkBQMd2podvuA8LyABat3EqyqauDT4B2S+qMk433bT2QOhi03EEKZfeXg4U HNT4R5VjkZAjyVwaAmfbmG5ejmu7BC06FAM42EU6stkRvqRJREEkSFgcQxqq13EZRp0h efjfPRRxTuznZgeFxh5o569dZ7t7DxU6TVbd/kYIPZ0PqceVU/nX5hcMAT/YF70oIf2U xvv0lkrsAkQFzfSo/1rf9+b4Birzg6x99vHiZQE64EuG4nRzlI6hOoEdeUCpTkKrKwd7 i+9g== X-Gm-Message-State: AKwxyteTwbDpSy9kLio8hdDX6u3YJ/lnBpuEH6k+45zMJ8S/EJCZY0mI NYVmN6UkBFRyCYtm41OOoXBl X-Google-Smtp-Source: ACJfBoustbMU/k4vgBnQDxApmgsgd3PdBZcNCqbyfntmGqnebWPI905124VMRVE6yd5phtmjYTzXGA== X-Received: by 10.80.220.70 with SMTP id y6mr12776091edk.236.1516369408715; Fri, 19 Jan 2018 05:43:28 -0800 (PST) Received: from laranjeiro-vm.dev.6wind.com (host.78.145.23.62.rev.coltfrance.com. [62.23.145.78]) by smtp.gmail.com with ESMTPSA id x37sm6605429edx.3.2018.01.19.05.43.27 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Fri, 19 Jan 2018 05:43:28 -0800 (PST) Date: Fri, 19 Jan 2018 14:43:17 +0100 From: =?iso-8859-1?Q?N=E9lio?= Laranjeiro To: Olivier Matz Cc: dev@dpdk.org, Adrien Mazarguil , Yongseok Koh , stable@dpdk.org Message-ID: <20180119134317.ihvjyytdz2fqmwhh@laranjeiro-vm.dev.6wind.com> References: <20180118130043.31773-1-olivier.matz@6wind.com> <20180118160427.4fokyhq7koux6ga6@laranjeiro-vm.dev.6wind.com> <20180118161308.26ssahokrsu4e2rn@platinum> <20180119083501.osf4rnd4y4lwujwn@laranjeiro-vm.dev.6wind.com> <20180119084314.uvjbhtveuq7wfpj3@platinum> <20180119133045.2skvdjis6yxk3bet@platinum> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20180119133045.2skvdjis6yxk3bet@platinum> User-Agent: NeoMutt/20170113 (1.7.2) Subject: Re: [dpdk-dev] [PATCH 1/2] net/mlx5: fix return value of start operation X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 19 Jan 2018 13:43:29 -0000 On Fri, Jan 19, 2018 at 02:30:45PM +0100, Olivier Matz wrote: > On Fri, Jan 19, 2018 at 09:43:14AM +0100, Olivier Matz wrote: > > On Fri, Jan 19, 2018 at 09:35:01AM +0100, Nélio Laranjeiro wrote: > > > On Thu, Jan 18, 2018 at 05:13:08PM +0100, Olivier Matz wrote: > > > > On Thu, Jan 18, 2018 at 05:04:27PM +0100, Nélio Laranjeiro wrote: > > > > > On Thu, Jan 18, 2018 at 02:00:42PM +0100, Olivier Matz wrote: > > > > > > On error, mlx5_dev_start() does not return a negative value > > > > > > as it is supposed to do. The consequence is that the application > > > > > > (ex: testpmd) does not notice that the port is not started > > > > > > and begins the rxtx on an uninitialized port, which crashes. > > > > > > > > > > > > Fixes: e1016cb73383 ("net/mlx5: fix Rx interrupts management") > > > > > > Cc: stable@dpdk.org > > > > > > > > > > > > Signed-off-by: Olivier Matz > > > > > > --- > > > > > > drivers/net/mlx5/mlx5_trigger.c | 4 +++- > > > > > > 1 file changed, 3 insertions(+), 1 deletion(-) > > > > > > > > > > > > diff --git a/drivers/net/mlx5/mlx5_trigger.c b/drivers/net/mlx5/mlx5_trigger.c > > > > > > index 1a20967a2..44f702daa 100644 > > > > > > --- a/drivers/net/mlx5/mlx5_trigger.c > > > > > > +++ b/drivers/net/mlx5/mlx5_trigger.c > > > > > > @@ -166,6 +166,7 @@ mlx5_dev_start(struct rte_eth_dev *dev) > > > > > > ERROR("%p: an error occurred while configuring control flows:" > > > > > > " %s", > > > > > > (void *)priv, strerror(err)); > > > > > > + err = -err; > > > > > > goto error; > > > > > > } > > > > > > err = priv_flow_start(priv, &priv->flows); > > > > > > @@ -173,6 +174,7 @@ mlx5_dev_start(struct rte_eth_dev *dev) > > > > > > ERROR("%p: an error occurred while configuring flows:" > > > > > > " %s", > > > > > > (void *)priv, strerror(err)); > > > > > > + err = -err; > > > > > > goto error; > > > > > > } > > > > > > err = priv_rx_intr_vec_enable(priv); > > > > > > @@ -196,7 +198,7 @@ mlx5_dev_start(struct rte_eth_dev *dev) > > > > > > priv_rxq_stop(priv); > > > > > > priv_flow_delete_drop_queue(priv); > > > > > > priv_unlock(priv); > > > > > > - return -err; > > > > > > + return err; > > > > > > } > > > > > > > > > > > > /** > > > > > > > > > > err in the function is handled with positives errno's, adding only those > > > > > two and returning err will make the other positive. > > > > > > > > I tried to check the return value of all functions called by mlx5_dev_start() > > > > (negative or positive). Do you see something wrong? > > > > > > What I mean is priv_flow_start() is returning a positive errno as all > > > other functions priv_*() that's the main reason for the final rteurn -err; > > priv_txq_start(priv); > -> negative on error > priv_rxq_start(priv); > -> negative on error > priv_dev_traffic_enable(priv, dev); > -> positive (+errno) on error > priv_flow_start(priv, &priv->flows); > -> positive (+errno) on error > priv_rx_intr_vec_enable(priv); > -> negative (-1 or -errno) on error What a mess, it should be all positives... > > > Internally MLX5 driver only works with positives errnos as lot of them > > > are retuning the values from ioctl directly. Only the public ones are > > > returning negatives. > > > > So, what should I modify in this patch for v2? > > Do you agree that there is a bug regarding the return value of mlx5_dev_start()? > > > > It can be reproduced easily by starting testpmd on a dual-socket machine, > > use the core and memory from socket 0, and have the mlx device on socket 1. > > Then start traffic forwarding, it will crash. -- Nélio Laranjeiro 6WIND