patch 'net/i40e: fix mbuf leak' has been queued to stable release 19.11.11

[christian.ehrhardt at canonical.com]

Hi,

FYI, your patch has been queued to stable release 19.11.11

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before December 10th 2021. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/cpaelzer/dpdk-stable-queue

This queued commit can be viewed at:
https://github.com/cpaelzer/dpdk-stable-queue/commit/ba9d67f359f0b92bfb409e0fa4cb33276ca3d395

Thanks.

Christian Ehrhardt <christian.ehrhardt at canonical.com>

---
>From ba9d67f359f0b92bfb409e0fa4cb33276ca3d395 Mon Sep 17 00:00:00 2001
From: Qiming Chen <chenqiming_huawei at 163.com>
Date: Mon, 23 Aug 2021 09:50:34 +0800
Subject: [PATCH] net/i40e: fix mbuf leak

[ upstream commit 4b458675d3df13d1a35db959fe97a04a132788b2 ]

A local test found that repeated port start and stop operations during
the continuous SSE vector bufflist receiving process will cause the mbuf
resource to run out. The final positioning is when the port is stopped,
the mbuf of the pkt_first_seg pointer is not released. Resources leak.
The patch scheme is to judge whether the pointer is empty when the port
is stopped, and release the corresponding mbuf if it is not empty.

Fixes: 4861cde46116 ("i40e: new poll mode driver")

Signed-off-by: Qiming Chen <chenqiming_huawei at 163.com>
Acked-by: Qi Zhang <qi.z.zhang at intel.com>
---
 drivers/net/i40e/i40e_rxtx.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/i40e/i40e_rxtx.c b/drivers/net/i40e/i40e_rxtx.c
index 6cba729639..0d5c721b52 100644
--- a/drivers/net/i40e/i40e_rxtx.c
+++ b/drivers/net/i40e/i40e_rxtx.c
@@ -2487,6 +2487,10 @@ i40e_reset_rx_queue(struct i40e_rx_queue *rxq)
 #endif /* RTE_LIBRTE_I40E_RX_ALLOW_BULK_ALLOC */
 	rxq->rx_tail = 0;
 	rxq->nb_rx_hold = 0;
+
+	if (rxq->pkt_first_seg != NULL)
+		rte_pktmbuf_free(rxq->pkt_first_seg);
+
 	rxq->pkt_first_seg = NULL;
 	rxq->pkt_last_seg = NULL;
 
-- 
2.34.0

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2021-11-30 16:50:07.935682225 +0100
+++ 0032-net-i40e-fix-mbuf-leak.patch	2021-11-30 16:50:05.622872298 +0100
@@ -1 +1 @@
-From 4b458675d3df13d1a35db959fe97a04a132788b2 Mon Sep 17 00:00:00 2001
+From ba9d67f359f0b92bfb409e0fa4cb33276ca3d395 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 4b458675d3df13d1a35db959fe97a04a132788b2 ]
+
@@ -14 +15,0 @@
-Cc: stable at dpdk.org
@@ -23 +24 @@
-index 8329cbdd4e..3eb82578b0 100644
+index 6cba729639..0d5c721b52 100644
@@ -26 +27 @@
-@@ -2590,6 +2590,10 @@ i40e_reset_rx_queue(struct i40e_rx_queue *rxq)
+@@ -2487,6 +2487,10 @@ i40e_reset_rx_queue(struct i40e_rx_queue *rxq)