Linux v4.8 added support to runtime suspend PCIe ports to D3hot. Patches 1 to 6 of this series apply high gloss polish to that code to speed it up, reduce its size and improve its readability. None of these patches should result in a functional change. (And they didn't in my tests.) Patches 7 and 8 are cleanups / refactorings for acpiphp. They're prep work for patch 9 and likewise shouldn't cause a functional change. Patch 9 extends runtime PM support to hotplug ports. @Keith Busch: I seem to recall you're working with large arrays of NVMe drives connected to native PCIe hotplug ports. Perhaps you could give this series a spin, it might save quite a bit of power. To ease reviewing I've pushed this series to GitHub: https://github.com/l1k/linux/commits/pcie_port_pm_v1 Thanks, Lukas Lukas Wunner (9): PCI: Don't acquire ref on parent in pci_bridge_d3_update() PCI: Autosense device removal in pci_bridge_d3_update() PCI: Speed up algorithm in pci_bridge_d3_update() PCI: Activate runtime PM on a PCIe port only if it can suspend PCI: Consolidate conditions to allow runtime PM on PCIe ports PCI: Unfold conditions to block runtime PM on PCIe ports ACPI / hotplug / PCI: Use cached copy of PCI_EXP_SLTCAP_HPC bit ACPI / hotplug / PCI: Make device_is_managed_by_native_pciehp() public PCI: pciehp: Add runtime PM support for PCIe hotplug ports drivers/pci/bus.c | 2 +- drivers/pci/hotplug/acpiphp_glue.c | 31 +----------- drivers/pci/hotplug/pciehp_ctrl.c | 6 +++ drivers/pci/pci-acpi.c | 24 +++++++++ drivers/pci/pci.c | 101 ++++++++++++++++++------------------- drivers/pci/pci.h | 4 +- drivers/pci/pcie/portdrv_pci.c | 13 ++--- drivers/pci/remove.c | 2 +- include/linux/pci_hotplug.h | 2 + 9 files changed, 89 insertions(+), 96 deletions(-) -- 2.9.3 -- 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
