[dpdk-stable] patch 'eventdev: fix Rx SW adapter stop' has been queued to LTS release 17.11.4

[Yongseok Koh <yskoh@mellanox.com>]

Hi,

FYI, your patch has been queued to LTS release 17.11.4

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 07/28/18. So please
shout if anyone has objections.

Thanks.

Yongseok

---
>From ca24d9649e81e0be9305897cf744db239117843d Mon Sep 17 00:00:00 2001
From: Nikhil Rao <nikhil.rao@intel.com>
Date: Mon, 4 Jun 2018 18:25:17 +0530
Subject: [PATCH] eventdev: fix Rx SW adapter stop

[ upstream commit a66a83744667f31ee97e18eefa90105c462ed81b ]

The Rx adapter stop call does not guarantee that the
SW service function will not execute after the
rte_event_eth_rx_adapter_stop() call.

Add a "started" flag to prevent the adapter from executing
if stop has been called.

Fixes: 9c38b704d280 ("eventdev: add eth Rx adapter implementation")

Signed-off-by: Nikhil Rao <nikhil.rao@intel.com>
---
 lib/librte_eventdev/rte_event_eth_rx_adapter.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/lib/librte_eventdev/rte_event_eth_rx_adapter.c b/lib/librte_eventdev/rte_event_eth_rx_adapter.c
index e767591e8..d5c3fd56c 100644
--- a/lib/librte_eventdev/rte_event_eth_rx_adapter.c
+++ b/lib/librte_eventdev/rte_event_eth_rx_adapter.c
@@ -87,6 +87,8 @@ struct rte_event_eth_rx_adapter {
 	int socket_id;
 	/* Per adapter EAL service */
 	uint32_t service_id;
+	/* Adapter started flag */
+	uint8_t rxa_started;
 } __rte_cache_aligned;
 
 /* Per eth device */
@@ -542,6 +544,10 @@ event_eth_rx_adapter_service_func(void *args)
 
 	if (rte_spinlock_trylock(&rx_adapter->rx_lock) == 0)
 		return 0;
+	if (!rx_adapter->rxa_started) {
+		return 0;
+		rte_spinlock_unlock(&rx_adapter->rx_lock);
+	}
 	eth_rx_poll(rx_adapter);
 	rte_spinlock_unlock(&rx_adapter->rx_lock);
 	return 0;
@@ -831,8 +837,12 @@ rx_adapter_ctrl(uint8_t id, int start)
 						&rte_eth_devices[i]);
 	}
 
-	if (use_service)
+	if (use_service) {
+		rte_spinlock_lock(&rx_adapter->rx_lock);
+		rx_adapter->rxa_started = start;
 		rte_service_runstate_set(rx_adapter->service_id, start);
+		rte_spinlock_unlock(&rx_adapter->rx_lock);
+	}
 
 	return 0;
 }
-- 
2.11.0