[dpdk-stable] patch 'ethdev: fix port accessing after release' has been queued to stable release 18.02.2

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to stable release 18.02.2

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 05/02/18. So please
shout if anyone has objections.

Thanks.

Luca Boccassi

---
>From ef52abb3783d209fc258b7e1bd915bc2735a3ef5 Mon Sep 17 00:00:00 2001
From: Matan Azrad <matan at mellanox.com>
Date: Wed, 28 Mar 2018 12:10:30 +0000
Subject: [PATCH] ethdev: fix port accessing after release

[ upstream commit f0e1180cb6a99825587ce4c108c4366023ac1f63 ]

rte_eth_dev_pci_release() function wrongly releases an ethdev port and
then releases internal fields of this port.
This behavior is problematic, because after the release, the port may
be reallocated again by another thread or just be invalid for any
usage.

Move the release operation to the end of the function.

Fixes: dcd5c8112bc3 ("ethdev: add PCI driver helpers")

Suggested-by: Ferruh Yigit <ferruh.yigit at intel.com>
Signed-off-by: Matan Azrad <matan at mellanox.com>
Acked-by: Thomas Monjalon <thomas at monjalon.net>
---
 lib/librte_ether/rte_ethdev_pci.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/librte_ether/rte_ethdev_pci.h b/lib/librte_ether/rte_ethdev_pci.h
index 897ce5b41..6565ae7d3 100644
--- a/lib/librte_ether/rte_ethdev_pci.h
+++ b/lib/librte_ether/rte_ethdev_pci.h
@@ -123,9 +123,6 @@ rte_eth_dev_pci_allocate(struct rte_pci_device *dev, size_t private_data_size)
 static inline void
 rte_eth_dev_pci_release(struct rte_eth_dev *eth_dev)
 {
-	/* free ether device */
-	rte_eth_dev_release_port(eth_dev);
-
 	if (rte_eal_process_type() == RTE_PROC_PRIMARY)
 		rte_free(eth_dev->data->dev_private);
 
@@ -139,6 +136,9 @@ rte_eth_dev_pci_release(struct rte_eth_dev *eth_dev)
 
 	eth_dev->device = NULL;
 	eth_dev->intr_handle = NULL;
+
+	/* free ether device */
+	rte_eth_dev_release_port(eth_dev);
 }
 
 typedef int (*eth_dev_pci_callback_t)(struct rte_eth_dev *eth_dev);
-- 
2.14.2