From mboxrd@z Thu Jan  1 00:00:00 1970
From: Remy Horton <remy.horton@intel.com>
Subject: Re: [PATCH v1] ethdev: fix multi-process NULL
	dereference crashes
Date: Tue, 24 Jan 2017 08:16:29 +0000
Message-ID: <9128e0fe-23b5-4a9f-31c5-29ee22358909@intel.com>
References: <1484073764-15001-1-git-send-email-remy.horton@intel.com>
 <1923485.xZPm2OXYXH@xps13>
Mime-Version: 1.0
Content-Type: text/plain; charset=windows-1252; format=flowed
Content-Transfer-Encoding: 7bit
Cc: dev@dpdk.org
To: Thomas Monjalon <thomas.monjalon@6wind.com>
Return-path: <dev-bounces@dpdk.org>
Received: from mga02.intel.com (mga02.intel.com [134.134.136.20])
 by dpdk.org (Postfix) with ESMTP id CFFC3108D
 for <dev@dpdk.org>; Tue, 24 Jan 2017 09:16:32 +0100 (CET)
In-Reply-To: <1923485.xZPm2OXYXH@xps13>
List-Id: DPDK patches and discussions <dev.dpdk.org>
List-Unsubscribe: <http://dpdk.org/ml/options/dev>,
 <mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://dpdk.org/ml/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <http://dpdk.org/ml/listinfo/dev>,
 <mailto:dev-request@dpdk.org?subject=subscribe>
Errors-To: dev-bounces@dpdk.org
Sender: "dev" <dev-bounces@dpdk.org>


On 20/01/2017 18:37, Thomas Monjalon wrote:
[..]
> 3 comments here:
> - it is in the wrong section (EAL instead of Drivers)
> - secondary processes can setup a vdev PMD
> - before Yuanhan's patch, even PCI PMD were blanking primary process data

Since the code being changed is in rte_ether rather than drivers/net it 
seemed the logical place to me.. :)

> I propose this rebase:
>
> -       memset(&rte_eth_dev_data[port_id], 0, sizeof(struct rte_eth_dev_data));
>         eth_dev = eth_dev_get(port_id);
> +       if (rte_eal_process_type() == RTE_PROC_PRIMARY)
> +               memset(eth_dev->data, 0, sizeof(*eth_dev->data));
>         snprintf(eth_dev->data->name, sizeof(eth_dev->data->name), "%s", name);
>         eth_dev->data->port_id = port_id;
>         eth_dev->data->mtu = ETHER_MTU;

Seems OK to me, assuming Yuanhan's patch is going in as-is.

..Remy