The two patches here force AER and DPC to honor the Host Bridge's Native AER/DPC settings. This is under the assumption that when these bits are set, that Firmware-First AER/DPC should not be in use for these ports. This assumption seems to be true in ACPI, which explicitly clears these capability settings in the host bridge if the service cannot be negotiated with _OSC. This also fixes an issue I've seen in a few platforms whose BIOS and/or switch firmware leaves DPC preconfigured. In these cases, the kernel DPC driver cannot bind a handler to the interrupt and could result in unmanaged DPC link down events. Jon Derrick (2): PCI/AER: Allow Native AER Host Bridges to use AER PCI/DPC: Allow Native DPC Host Bridges to use DPC drivers/pci/pcie/aer.c | 3 +++ drivers/pci/pcie/dpc.c | 3 ++- drivers/pci/pcie/portdrv_core.c | 3 ++- 3 files changed, 7 insertions(+), 2 deletions(-) -- 1.8.3.1
