From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f67.google.com (mail-wm0-f67.google.com [74.125.82.67]) by dpdk.org (Postfix) with ESMTP id F12D61B2A4 for ; Fri, 19 Jan 2018 09:35:13 +0100 (CET) Received: by mail-wm0-f67.google.com with SMTP id f71so1777062wmf.0 for ; Fri, 19 Jan 2018 00:35:13 -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=jM8sVc4jWuAynhYUYu9MEnHXhlOKmt8uj31M+lmFFhQ=; b=jVqYJJ21eayEdDyvaDE/Q0pxuZ+Wr2WIxzpBb9dwYLnDZGsAuWOV4zVxNm1Sppnmny uKLB4BbOIFpkBDPmOtmOSII9Ly4R1EKeu9B+ylmY2IK3gFXPoFznDgVMJH+Dn3f95tMP VmPhtILlh23Pil5sl2gDpIRITDXed2S0oKmagSV4OW6pPtBcTv9zwbw3kAW0oANJpOLB 5MMo1Eb90CXkHbkqyvg9J4UrWBQAoo4xWAdLaCVY2wS1CIWyepOPPIJpTqP3/Uhd+K4P 6/6bFKvuQyJVQdHjnEhN/HE9GYaAvZMpDQ1gJsmkl14pmdfGh9dsF+T4CrWIhzORF9I7 7uIQ== 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=jM8sVc4jWuAynhYUYu9MEnHXhlOKmt8uj31M+lmFFhQ=; b=SB08SchEzu3SAnRtIomHq9zE8uqCMPsfpAMvd8HAEYD6i2+DmR4a7dJGaJQKlNqrJQ QrhHZdAdudkOV82L0vyCsovjdt4jLm12y1Wt39nNN/gxg0igxML2wNRExSBMObIXawrP SXLCCg/ephZ8VCuRTzXZPk2ZRdBIplPj9ALRQ9ZFJooum3vqI6p/scvJ35d1d/vkpZME 5Ov8SCBOLFkNfZARhbAJeXPvenEXWiB/jd2yozsSQI1nDl7bdoP2kJobmQwUXC7GCH8o Qj1ueYo2rXlOwEsCu1ocOruJNJddWHnKXVuqPbO37OexDeqliVT8qS0lKps3MIlnCjvk zYfA== X-Gm-Message-State: AKwxytdLfc/SpfSSUHHGhOOez2KJ134YQPp5tbZX9S6tVZhiGdAFa/4S 17DOJUk8H9z0CEXEL/2Az+t1 X-Google-Smtp-Source: ACJfBosKRyWoCQsTV/hfx3cQVIBFU1Y9z4PVKic4a/w90rRXUxtbplHFgQ6raHD+gx6NP7hTKFE3xA== X-Received: by 10.80.133.140 with SMTP id a12mr11966285edh.286.1516350913676; Fri, 19 Jan 2018 00:35:13 -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 m15sm300828edj.41.2018.01.19.00.35.12 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Fri, 19 Jan 2018 00:35:13 -0800 (PST) Date: Fri, 19 Jan 2018 09:35:01 +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: <20180119083501.osf4rnd4y4lwujwn@laranjeiro-vm.dev.6wind.com> References: <20180118130043.31773-1-olivier.matz@6wind.com> <20180118160427.4fokyhq7koux6ga6@laranjeiro-vm.dev.6wind.com> <20180118161308.26ssahokrsu4e2rn@platinum> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20180118161308.26ssahokrsu4e2rn@platinum> User-Agent: NeoMutt/20170113 (1.7.2) Subject: Re: [dpdk-stable] [PATCH 1/2] net/mlx5: fix return value of start operation X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 19 Jan 2018 08:35:14 -0000 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; 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. -- Nélio Laranjeiro 6WIND