[dpdk-stable] patch 'net/ixgbe: fix mbuf leak' has been queued to stable release 20.11.4

[Xueming Li]

Hi,

FYI, your patch has been queued to stable release 20.11.4

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 11/12/21. 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/steevenlee/dpdk

This queued commit can be viewed at:
https://github.com/steevenlee/dpdk/commit/d9958c190766e659e9f3d9b24d3331c147390096

Thanks.

Xueming Li <xuemingl at nvidia.com>

---
>From d9958c190766e659e9f3d9b24d3331c147390096 Mon Sep 17 00:00:00 2001
From: Qiming Chen <chenqiming_huawei at 163.com>
Date: Wed, 1 Sep 2021 15:22:37 +0800
Subject: [PATCH] net/ixgbe: fix mbuf leak
Cc: Xueming Li <xuemingl at nvidia.com>

[ upstream commit d54b51efb6ef12b8cdfc7316316d99e2a762e1cd ]

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: af75078fece3 ("first public release")

Signed-off-by: Qiming Chen <chenqiming_huawei at 163.com>
Acked-by: Haiyue Wang <haiyue.wang at intel.com>
---
 drivers/net/ixgbe/ixgbe_rxtx.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ixgbe/ixgbe_rxtx.c b/drivers/net/ixgbe/ixgbe_rxtx.c
index 3b893b0df0..3d983d4db7 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx.c
+++ b/drivers/net/ixgbe/ixgbe_rxtx.c
@@ -2948,6 +2948,10 @@ ixgbe_reset_rx_queue(struct ixgbe_adapter *adapter, struct ixgbe_rx_queue *rxq)
 	rxq->rx_free_trigger = (uint16_t)(rxq->rx_free_thresh - 1);
 	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;
 
-- 
2.33.0

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2021-11-10 14:17:03.949497390 +0800
+++ 0041-net-ixgbe-fix-mbuf-leak.patch	2021-11-10 14:17:01.797413358 +0800
@@ -1 +1 @@
-From d54b51efb6ef12b8cdfc7316316d99e2a762e1cd Mon Sep 17 00:00:00 2001
+From d9958c190766e659e9f3d9b24d3331c147390096 Mon Sep 17 00:00:00 2001
@@ -4,0 +5,3 @@
+Cc: Xueming Li <xuemingl at nvidia.com>
+
+[ upstream commit d54b51efb6ef12b8cdfc7316316d99e2a762e1cd ]
@@ -14 +16,0 @@
-Cc: stable at dpdk.org
@@ -23 +25 @@
-index c814a28cb4..bfdfd5e755 100644
+index 3b893b0df0..3d983d4db7 100644
@@ -26 +28 @@
-@@ -2981,6 +2981,10 @@ ixgbe_reset_rx_queue(struct ixgbe_adapter *adapter, struct ixgbe_rx_queue *rxq)
+@@ -2948,6 +2948,10 @@ ixgbe_reset_rx_queue(struct ixgbe_adapter *adapter, struct ixgbe_rx_queue *rxq)