Hi Bjorn, Keith Busch and jordan hargrave reported the same issue about mps issue after pci device hot add. It seems that more firmware set device mps >=256B default. So can you pick up this patch to fix this issue temporarily. Yijing Wang (1): PCI: update device mps when doing pci hotplug drivers/pci/probe.c | 39 +++++++++++++++++++++++++++++++++++++++ 1 files changed, 39 insertions(+), 0 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html