Yinghai has been working on pciehp timeouts related to a hardware erratum in Intel, AMD, and Nvidia hotplug controllers. This affects the way we wait for command completion on those controllers. I had some suggestions about how to change pciehp to make this work better in general, without having to check for specific vendors. We need something that works well on hardware that conforms to the spec, as well as the stuff that doesn't. I haven't heard anything for a while, so I wrote up these patches to make my proposals concrete. Unfortunately, I can't easily test any of this, so I'm posting these for comment and possible testing if anybody is ambitious. The Intel erratum is CF118, described here: http://www.intel.com/content/www/us/en/processors/xeon/xeon-e7-v2-spec-update.html --- Bjorn Helgaas (4): PCI: pciehp: Make pcie_wait_cmd() self-contained PCI: pciehp: Wait for hotplug command completion lazily PCI: pciehp: Compute timeout from hotplug command start time PCI: pciehp: Remove assumptions about which commands cause completion events drivers/pci/hotplug/pciehp.h | 2 + drivers/pci/hotplug/pciehp_hpc.c | 91 +++++++++++++++++--------------------- 2 files changed, 42 insertions(+), 51 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
