0013-net-ena-fix-dev-init-with-multi-process.patch

From 1278928ed5362188fa9003da082dfa97aa5b5678 Mon Sep 17 00:00:00 2001
From: Michal Krawczyk <mk@semihalf.com>
Date: Fri, 25 Jan 2019 09:10:25 +0100
Subject: [PATCH 13/27] net/ena: fix dev init with multi-process

[ upstream commit fd9768905870856a2340266d25f8c0100dfccfff ]

The check for proc type in eth_ena_dev_init() should appear before
modyfing adapter structure.

Calling memset on ena_adapter from secondary process context, was
erasing all structure information, and it was causing the crash of the
main process.

Fixes: 1173fca25af9 ("ena: add polling-mode driver")
Cc: stable@dpdk.org

Change-Id: Iff9f6ffbaec9dc55408788f62a43d690534048ed
Signed-off-by: Michal Krawczyk <mk@semihalf.com>
---
 drivers/net/ena/ena_ethdev.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c
index 813e95e95e..a96ec69753 100644
--- a/drivers/net/ena/ena_ethdev.c
+++ b/drivers/net/ena/ena_ethdev.c
@@ -1531,19 +1531,20 @@ static int eth_ena_dev_init(struct rte_eth_dev *eth_dev)
 	static int adapters_found;
 	bool wd_state;
 
-	memset(adapter, 0, sizeof(struct ena_adapter));
-	ena_dev = &adapter->ena_dev;
-
 	eth_dev->dev_ops = &ena_dev_ops;
 	eth_dev->rx_pkt_burst = &eth_ena_recv_pkts;
 	eth_dev->tx_pkt_burst = &eth_ena_xmit_pkts;
 	eth_dev->tx_pkt_prepare = &eth_ena_prep_pkts;
-	adapter->rte_eth_dev_data = eth_dev->data;
-	adapter->rte_dev = eth_dev;
 
 	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 		return 0;
 
+	memset(adapter, 0, sizeof(struct ena_adapter));
+	ena_dev = &adapter->ena_dev;
+
+	adapter->rte_eth_dev_data = eth_dev->data;
+	adapter->rte_dev = eth_dev;
+
 	pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
 	adapter->pdev = pci_dev;
 
-- 
2.20.1