patch 'net/i40e: preserve RSS RETA across port stop and start' has been queued to stable release 24.11.9

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to stable release 24.11.9

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 10/29/26. 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/bluca/dpdk-stable

This queued commit can be viewed at:
https://github.com/bluca/dpdk-stable/commit/e7637db8bbe4d13d3740a4f49e41dc3e1a960a4c

Thanks.

Luca Boccassi

---
>From e7637db8bbe4d13d3740a4f49e41dc3e1a960a4c Mon Sep 17 00:00:00 2001
From: Ciara Loftus <ciara.loftus at intel.com>
Date: Wed, 12 Aug 2026 14:38:43 +0000
Subject: [PATCH] net/i40e: preserve RSS RETA across port stop and start

[ upstream commit 461679f19a68b23e92832dd0a529ac7bf2c681d4 ]

Currently, updating the RSS redirection table and then stopping and
starting a port loses the update. The port comes back with the default
table. The ethdev API requires RSS settings to be retained across
stop/start.

The `rss_reta_updated` flag protects a user-provided RETA from being
overwritten by the default table when the device is started. However
`i40e_dev_stop()` clears this flag, so a subsequent `i40e_dev_start()`
treats the RETA as untouched and resets it to the default.

Fix it by clearing `rss_reta_updated` in `i40e_dev_configure()` instead of
`i40e_dev_stop()`. A reconfiguration still reverts to the default table,
while a plain stop/start now preserves the RETA.

Bugzilla ID: 1127
Fixes: 36c5dc8e5d3c ("net/i40e: fix overwriting RSS RETA")

Signed-off-by: Ciara Loftus <ciara.loftus at intel.com>
Acked-by: Bruce Richardson <bruce.richardson at intel.com>
---
 drivers/net/i40e/i40e_ethdev.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index a6e7fe79d49..dc90c0060c0 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -1992,6 +1992,9 @@ i40e_dev_configure(struct rte_eth_dev *dev)
 	if (dev->data->dev_conf.rxmode.mq_mode & RTE_ETH_MQ_RX_RSS_FLAG)
 		dev->data->dev_conf.rxmode.offloads |= RTE_ETH_RX_OFFLOAD_RSS_HASH;
 
+	/* A new configuration reverts the RETA to the driver default. */
+	pf->adapter->rss_reta_updated = 0;
+
 	ret = i40e_dev_init_vlan(dev);
 	if (ret < 0)
 		goto err;
@@ -2676,8 +2679,6 @@ i40e_dev_stop(struct rte_eth_dev *dev)
 	hw->adapter_stopped = 1;
 	dev->data->dev_started = 0;
 
-	pf->adapter->rss_reta_updated = 0;
-
 	return 0;
 }
 
-- 
2.47.3

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2026-10-27 11:43:56.666931782 +0000
+++ 0077-net-i40e-preserve-RSS-RETA-across-port-stop-and-star.patch	2026-10-27 11:43:53.594061924 +0000
@@ -1 +1 @@
-From 461679f19a68b23e92832dd0a529ac7bf2c681d4 Mon Sep 17 00:00:00 2001
+From e7637db8bbe4d13d3740a4f49e41dc3e1a960a4c Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 461679f19a68b23e92832dd0a529ac7bf2c681d4 ]
+
@@ -22 +23,0 @@
-Cc: stable at dpdk.org
@@ -27 +28 @@
- drivers/net/intel/i40e/i40e_ethdev.c | 5 +++--
+ drivers/net/i40e/i40e_ethdev.c | 5 +++--
@@ -30,4 +31,4 @@
-diff --git a/drivers/net/intel/i40e/i40e_ethdev.c b/drivers/net/intel/i40e/i40e_ethdev.c
-index 4282081e0d..e6f57e144c 100644
---- a/drivers/net/intel/i40e/i40e_ethdev.c
-+++ b/drivers/net/intel/i40e/i40e_ethdev.c
+diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
+index a6e7fe79d49..dc90c0060c0 100644
+--- a/drivers/net/i40e/i40e_ethdev.c
++++ b/drivers/net/i40e/i40e_ethdev.c