patch 'net/failsafe: ignore unsupported link status update' 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 11/07/26. 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/a8b4b7fcbd06114c05b1a94406c584ad31a11c66

Thanks.

Luca Boccassi

---
>From a8b4b7fcbd06114c05b1a94406c584ad31a11c66 Mon Sep 17 00:00:00 2001
From: Sandeep Penigalapati <sandeep.penigalapati at intel.com>
Date: Thu, 15 Oct 2026 16:19:25 +0000
Subject: [PATCH] net/failsafe: ignore unsupported link status update

[ upstream commit 5c498b4cf8a10092c2965018b132c1953c5316df ]

When applying the configuration to a sub-device,
fs_eth_dev_conf_apply() forces the link up or down with
rte_eth_dev_set_link_up()/rte_eth_dev_set_link_down(). Sub-devices such
as virtio-net do not support software link control and return -ENOTSUP,
which fail-safe treated as a fatal error and aborted the configuration
apply, preventing plug-in of such sub-devices.

Treat -ENOTSUP from the link control as success; the sub-device link
simply follows its physical state.

Fixes: ebea83f899d8 ("net/failsafe: add plug-in support")

Signed-off-by: Sandeep Penigalapati <sandeep.penigalapati at intel.com>
---
 drivers/net/failsafe/failsafe_ether.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/failsafe/failsafe_ether.c b/drivers/net/failsafe/failsafe_ether.c
index 7d1628caacd..44d04ee394f 100644
--- a/drivers/net/failsafe/failsafe_ether.c
+++ b/drivers/net/failsafe/failsafe_ether.c
@@ -115,7 +115,11 @@ fs_eth_dev_conf_apply(struct rte_eth_dev *dev,
 			ret = rte_eth_dev_set_link_up(PORT_ID(sdev));
 		else
 			ret = rte_eth_dev_set_link_down(PORT_ID(sdev));
-		if (ret) {
+		if (ret == -ENOTSUP) {
+			/* The sub-device link follows its physical state. */
+			DEBUG("link_status control not supported");
+			ret = 0;
+		} else if (ret) {
 			ERROR("Failed to apply link_status");
 			return ret;
 		}
-- 
2.47.3

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2026-11-05 16:42:47.501471843 +0000
+++ 0066-net-failsafe-ignore-unsupported-link-status-update.patch	2026-11-05 16:42:44.997063057 +0000
@@ -1 +1 @@
-From 5c498b4cf8a10092c2965018b132c1953c5316df Mon Sep 17 00:00:00 2001
+From a8b4b7fcbd06114c05b1a94406c584ad31a11c66 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 5c498b4cf8a10092c2965018b132c1953c5316df ]
+
@@ -17 +18,0 @@
-Cc: stable at dpdk.org
@@ -25 +26 @@
-index 21779f9be8..92a279a5b9 100644
+index 7d1628caacd..44d04ee394f 100644