patch 'net/tap: remove log when running without multiprocess' has been queued to stable release 23.11.7

[Shani Peretz]

Hi,

FYI, your patch has been queued to stable release 23.11.7

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 04/05/26. 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/shanipr/dpdk-stable

This queued commit can be viewed at:
https://github.com/shanipr/dpdk-stable/commit/f5972bf67420aeca88e6ea5e67e6cc38718851c1

Thanks.

Shani

---
>From f5972bf67420aeca88e6ea5e67e6cc38718851c1 Mon Sep 17 00:00:00 2001
From: David Marchand <david.marchand at redhat.com>
Date: Mon, 5 Jan 2026 13:36:40 +0100
Subject: [PATCH] net/tap: remove log when running without multiprocess

[ upstream commit d26d69a054012f77b535da77ee78c108646ee01c ]

In case DPDK is started with multiprocess disabled (like in OVS), there
is no reason to log an error on multiprocess aspects.

Note: the only caller of this helper does not check the return value.

Fixes: c36ce7099c21 ("net/tap: fix to populate FDs in secondary process")

Signed-off-by: David Marchand <david.marchand at redhat.com>
---
 drivers/net/tap/rte_eth_tap.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/net/tap/rte_eth_tap.c b/drivers/net/tap/rte_eth_tap.c
index 45970ca0de..da1caae6ab 100644
--- a/drivers/net/tap/rte_eth_tap.c
+++ b/drivers/net/tap/rte_eth_tap.c
@@ -845,7 +845,7 @@ tap_link_set_up(struct rte_eth_dev *dev)
 	return tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
 }
 
-static int
+static void
 tap_mp_req_on_rxtx(struct rte_eth_dev *dev)
 {
 	struct rte_mp_msg msg;
@@ -871,13 +871,10 @@ tap_mp_req_on_rxtx(struct rte_eth_dev *dev)
 	}
 
 	err = rte_mp_sendmsg(&msg);
-	if (err < 0) {
+	if (err < 0 && rte_errno != ENOTSUP) {
 		TAP_LOG(ERR, "Failed to send start req to secondary %d",
 			rte_errno);
-		return -1;
 	}
-
-	return 0;
 }
 
 static int
-- 
2.43.0

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2026-03-31 00:32:32.941953800 +0300
+++ 0042-net-tap-remove-log-when-running-without-multiprocess.patch	2026-03-31 00:32:28.985324000 +0300
@@ -1 +1 @@
-From d26d69a054012f77b535da77ee78c108646ee01c Mon Sep 17 00:00:00 2001
+From f5972bf67420aeca88e6ea5e67e6cc38718851c1 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit d26d69a054012f77b535da77ee78c108646ee01c ]
+
@@ -12 +13,0 @@
-Cc: stable at dpdk.org
@@ -20 +21 @@
-index 730f1859bd..7a8a98cddb 100644
+index 45970ca0de..da1caae6ab 100644
@@ -23,2 +24,2 @@
-@@ -769,7 +769,7 @@ tap_link_set_up(struct rte_eth_dev *dev)
- 	return 0;
+@@ -845,7 +845,7 @@ tap_link_set_up(struct rte_eth_dev *dev)
+ 	return tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
@@ -32,2 +33,2 @@
-@@ -791,13 +791,10 @@ tap_mp_req_on_rxtx(struct rte_eth_dev *dev)
- 	msg.num_fds = dev->data->nb_rx_queues;
+@@ -871,13 +871,10 @@ tap_mp_req_on_rxtx(struct rte_eth_dev *dev)
+ 	}