Hi,

5. Contributing Code to DPDK — Data Plane Development Kit 16.04.0 
documentation<https://dpdk.readthedocs.io/en/v16.04/contributing/patches.html#:~:text=The%20mailing%20list%20for%20DPDK%20development%20is%20dev%40dpkg.org.,is%20also%20worth%20registering%20for%20the%20DPDK%20Patchwork>

Please refer to this link. And about the description, I think it would be good 
to describe that the real issue is missing to set the proper value in the error 
branch.

From: Yang Xu <[email protected]>
Sent: Monday, November 17, 2025 5:12 PM
To: NBU-Contact-Thomas Monjalon (EXTERNAL) <[email protected]>; Dariusz 
Sosnowski <[email protected]>; Slava Ovsiienko <[email protected]>; 
Bing Zhao <[email protected]>; Ori Kam <[email protected]>; Suanming Mou 
<[email protected]>; Matan Azrad <[email protected]>; [email protected]; 
[email protected]
Cc: [email protected]
Subject: [PATCH v2 1/1] net/mlx5: fix set port down if detect anomaly

External email: Use caution opening links or attachments

MLX network interface card link detection will set the
interface to a down state upon detecting an anomaly.

Fixes: 1256805 ("move linux-specific functions")

Signed-off-by: Yang Xu <[email protected]<mailto:[email protected]>>
---
 .mailmap                                |  1 +
 drivers/net/mlx5/linux/mlx5_ethdev_os.c |  1 +
 test.eml                                | 21 +++++++++++++++++++++
 3 files changed, 23 insertions(+)
 create mode 100644 test.eml

diff --git a/.mailmap b/.mailmap
index 34a99f93a1..14d6ee93dd 100644
--- a/.mailmap
+++ b/.mailmap
@@ -1891,3 +1891,4 @@ Zoltan Kiss 
<[email protected]<mailto:[email protected]>> 
<[email protected]<mailto:[email protected]>>
 Zorik Machulsky <[email protected]<mailto:[email protected]>>
 Zyta Szpak <[email protected]<mailto:[email protected]>> 
<[email protected]<mailto:[email protected]>>
 Zyta Szpak <[email protected]<mailto:[email protected]>> 
<[email protected]<mailto:[email protected]>>
+Yang Xu <[email protected]<mailto:[email protected]>>
diff --git a/drivers/net/mlx5/linux/mlx5_ethdev_os.c 
b/drivers/net/mlx5/linux/mlx5_ethdev_os.c
index 9daeda5435..03531ae879 100644
--- a/drivers/net/mlx5/linux/mlx5_ethdev_os.c
+++ b/drivers/net/mlx5/linux/mlx5_ethdev_os.c
@@ -504,6 +504,7 @@ mlx5_link_update(struct rte_eth_dev *dev, int 
wait_to_complete)
                 return -rte_errno;
             }
         } else if (ret < 0) {
+            dev->data->dev_link = {0};
             return ret;
         }
     } while (wait_to_complete || retry-- > 0);
diff --git a/test.eml b/test.eml
new file mode 100644
index 0000000000..f30ef5dc8a
--- /dev/null
+++ b/test.eml
@@ -0,0 +1,21 @@
+./../dpdk-patch/0001-net-mlx5-fix-set-port-down-if-detect-anomaly.patch
+(mbox) Adding cc: Yang Xu <[email protected]<mailto:[email protected]>> 
from line 'From: Yang Xu <[email protected]<mailto:[email protected]>>'
+(body) Adding cc: Yang Xu <[email protected]<mailto:[email protected]>> 
from line 'Signed-off-by: Yang Xu 
<[email protected]<mailto:[email protected]>>'
+Dry-OK. Log says:
+Server: 10.5.231.43
+MAIL FROM:<[email protected]<mailto:[email protected]>>
+RCPT TO:<y>
+RCPT TO:<[email protected]<mailto:[email protected]>>
+From: Yang Xu <[email protected]<mailto:[email protected]>>
+To: y
+Cc: Yang Xu <[email protected]<mailto:[email protected]>>
+Subject: [PATCH v2 1/1] net/mlx5: fix set port down if detect anomaly
+Date: Fri, 14 Nov 2025 10:14:11 +0800
+Message-Id: 
<[email protected]<mailto:[email protected]>>
+X-Mailer: git-send-email 2.27.0
+In-Reply-To: <y>
+References: <y>
+MIME-Version: 1.0
+Content-Transfer-Encoding: 8bit
+
+Result: OK
--
2.27.0

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