[dpdk-stable] patch 'net/ena: cleanup if refilling of Rx descriptors fails' has been queued to stable release 17.02.1

[Yuanhan Liu]

Hi,

FYI, your patch has been queued to stable release 17.02.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 05/28/17. So please
shout if anyone has objections.

Thanks.

	--yliu

---
>From b96636f5792cd3925c536c08c24b6d88aed8dfdd Mon Sep 17 00:00:00 2001
From: Michal Krawczyk <mk at semihalf.com>
Date: Mon, 10 Apr 2017 16:28:10 +0200
Subject: [PATCH] net/ena: cleanup if refilling of Rx descriptors fails

[ upstream commit 2732e07ad1e54c648c8ca5bc6965af5bf607ba10 ]

If wrong number of descriptors for refilling was passed to the Rx
repopulate function, there was memory leak which caused memory pool to
run out of resources in longer go.

In case of fail when refilling Rx descriptors, all additional mbufs
have to be released.

Fixes: 1173fca25af9 ("ena: add polling-mode driver")

Signed-off-by: Michal Krawczyk <mk at semihalf.com>
Reviewed-by: Jakub Palider <jpalider at gmail.com>
Acked-by: Jan Medala <jan.medala at outlook.com>
---
 drivers/net/ena/ena_ethdev.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c
index b4c713f..e6e889b 100644
--- a/drivers/net/ena/ena_ethdev.c
+++ b/drivers/net/ena/ena_ethdev.c
@@ -1172,6 +1172,8 @@ static int ena_populate_rx_queue(struct ena_ring *rxq, unsigned int count)
 		rc = ena_com_add_single_rx_desc(rxq->ena_com_io_sq,
 						&ebuf, next_to_use_masked);
 		if (unlikely(rc)) {
+			rte_mempool_put_bulk(rxq->mb_pool, (void **)(&mbuf),
+					     count - i);
 			RTE_LOG(WARNING, PMD, "failed adding rx desc\n");
 			break;
 		}
-- 
1.9.0