Public bug reported: Max Payload Size for the NVMe device is not getting programmed correctly. The OS is trying to set the device MPS to match Root Port which is greater than Capability of Device, instead of looking for lowest common denominator.
This is fixed in upstream kernel version 4.19. Below are the commits that fix the issue. Please help include them in Ubuntu releases. PCI: Skip MPS logic for Virtual Functions (VFs) https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/pci/probe.c?h=v4.19-rc2&id=3dbe97efe8bf450b183d6dee2305cbc032e6b8a4 PCI: Match Root Port's MPS to endpoint's MPSS as necessary https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/pci/probe.c?h=v4.19-rc2&id=9f0e89359775ee21fe1ea732e34edb52aef5addf ** Affects: dell-poweredge Importance: Undecided Status: New ** Affects: linux (Ubuntu) Importance: Undecided Status: Incomplete ** Also affects: dell-poweredge Importance: Undecided Status: New -- 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/1794110 Title: MPS (Max Payload Size) is not correctly programmed upon Hot Insertion NVMe PCIe SSD Status in The Dell-poweredge project: New Status in linux package in Ubuntu: Incomplete Bug description: Max Payload Size for the NVMe device is not getting programmed correctly. The OS is trying to set the device MPS to match Root Port which is greater than Capability of Device, instead of looking for lowest common denominator. This is fixed in upstream kernel version 4.19. Below are the commits that fix the issue. Please help include them in Ubuntu releases. PCI: Skip MPS logic for Virtual Functions (VFs) https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/pci/probe.c?h=v4.19-rc2&id=3dbe97efe8bf450b183d6dee2305cbc032e6b8a4 PCI: Match Root Port's MPS to endpoint's MPSS as necessary https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/pci/probe.c?h=v4.19-rc2&id=9f0e89359775ee21fe1ea732e34edb52aef5addf To manage notifications about this bug go to: https://bugs.launchpad.net/dell-poweredge/+bug/1794110/+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
