Here is the kernel fix for OCP hot plug issue. [RFC] PCI: Fix the issue of link speed downgrade after link retraining - Patchwork https://patchwork.ozlabs.org/project/linux-pci/patch/20241107143758.12643-1-guojinhui.l...@bytedance.com/
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2085103 Title: pci hot plug get "retraining non-functional downstream link at 2.5GT/s]" Status in linux package in Ubuntu: New Status in linux-hwe-6.5 package in Ubuntu: Won't Fix Status in linux-hwe-6.8 package in Ubuntu: New Status in linux-hwe-6.5 source package in Jammy: Won't Fix Status in linux-hwe-6.8 source package in Jammy: In Progress Status in linux source package in Noble: In Progress Status in linux source package in Oracular: In Progress Bug description: Symptom : OCP NIC hot insert to system and can't archive to Gen5 speed Hardware configuration : CPU : SRF-SP Q4WS *2 OCP NIC MCX753436MC-HEAB (FW : 28.39.2048) Test scenario as below : 1. Boot into OS 2. Check system status is fine and clear all dmesg and SEL 3. Unload mlx5_ib and mlx5_core 4. Plug out OCP NIC 5. Check dmesg and SEL shown PCIe error caused by receiver error, assume the normal behavior 6. Plug in back the OCP NIC in same slot 7. Check the PCIe link status Summary result : OS version Kernel version Test result Ubuntu 22.04.0 5.15 Gen5 Ubuntu 22.04.4 6.5 Gen1 Ubuntu 24.04 6.8 Gen1 UEFI SHELL N/A Gen5 Windows 2022 N/A Gen5 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2085103/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
