On Wed, Feb 21, 2018 at 02:58:13PM +0530, George Cherian wrote: > I will explain the setup used > To the Cavium ThunderX RC the following PLX device is connected. > PLX Technology, Inc. PEX 8747 48-Lane, 5-Port PCI Express Gen 3 (8.0 GT/s) > Switch > There is no device connected downstream to the PLX switch. > > AFAIU the pcie_port driver probes PLX and enters autosuspend after 100ms > since pci_bridge_d3_possible() returns true. > > And later pci_sysfs_init() ends up doing a config access of PLX which fails > with a "synchronous external abort" Then you're missing a pci_config_pm_runtime_get() in pci_sysfs_init() or further down in the call stack, rather than a quirk which just papers over the issue. Thanks, Lukas
