patch 'vdpa/mlx5: fix check on error interrupt FD' 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/0bdb90f77a817e171985a93a406daa2978232621

Thanks.

Luca Boccassi

---
>From 0bdb90f77a817e171985a93a406daa2978232621 Mon Sep 17 00:00:00 2001
From: David Marchand <david.marchand at redhat.com>
Date: Wed, 14 Oct 2026 18:43:08 +0200
Subject: [PATCH] vdpa/mlx5: fix check on error interrupt FD

[ upstream commit 6292172351f5c4f276a1faa7f538d75272ba858d ]

A 0 file descriptor is valid.
Prefer setting to -1 to indicate an invalid FD.

Fixes: 0474419bae7c ("vdpa/mlx5: handle hardware error")

Signed-off-by: David Marchand <david.marchand at redhat.com>
Acked-by: Dariusz Sosnowski <dsosnowski at nvidia.com>
---
 drivers/vdpa/mlx5/mlx5_vdpa_event.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/vdpa/mlx5/mlx5_vdpa_event.c b/drivers/vdpa/mlx5/mlx5_vdpa_event.c
index 32430614d52..01259004eea 100644
--- a/drivers/vdpa/mlx5/mlx5_vdpa_event.c
+++ b/drivers/vdpa/mlx5/mlx5_vdpa_event.c
@@ -452,7 +452,7 @@ mlx5_vdpa_err_event_setup(struct mlx5_vdpa_priv *priv)
 					 mlx5_vdpa_err_interrupt_handler,
 					 priv);
 	if (ret != 0) {
-		rte_intr_fd_set(priv->err_intr_handle, 0);
+		rte_intr_fd_set(priv->err_intr_handle, -1);
 		DRV_LOG(ERR, "Failed to register error interrupt for device %d.",
 			priv->vid);
 		rte_errno = -ret;
@@ -473,7 +473,7 @@ mlx5_vdpa_err_event_unset(struct mlx5_vdpa_priv *priv)
 	int retries = MLX5_VDPA_INTR_RETRIES;
 	int ret = -EAGAIN;
 
-	if (!rte_intr_fd_get(priv->err_intr_handle))
+	if (rte_intr_fd_get(priv->err_intr_handle) < 0)
 		return;
 	while (retries-- && ret == -EAGAIN) {
 		ret = rte_intr_callback_unregister(priv->err_intr_handle,
@@ -487,6 +487,7 @@ mlx5_vdpa_err_event_unset(struct mlx5_vdpa_priv *priv)
 			rte_pause();
 		}
 	}
+	rte_intr_fd_set(priv->err_intr_handle, -1);
 	if (priv->err_chnl) {
 #ifdef HAVE_IBV_DEVX_EVENT
 		union {
-- 
2.47.3

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2026-10-27 11:44:00.724420448 +0000
+++ 0183-vdpa-mlx5-fix-check-on-error-interrupt-FD.patch	2026-10-27 11:43:53.766067248 +0000
@@ -1 +1 @@
-From 6292172351f5c4f276a1faa7f538d75272ba858d Mon Sep 17 00:00:00 2001
+From 0bdb90f77a817e171985a93a406daa2978232621 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 6292172351f5c4f276a1faa7f538d75272ba858d ]
+
@@ -10 +11,0 @@
-Cc: stable at dpdk.org
@@ -19 +20 @@
-index 43585a94b2..dee2ccc23d 100644
+index 32430614d52..01259004eea 100644