On Tue, Apr 11, 2017 at 05:33:11PM +0100, Ard Biesheuvel wrote: > This is a followup to the discussion regarding whether ACPI/arm64 systems > should preserve the PCI configuration performed by the firmware, or always > reconfigure it from scratch. > > This series proposes to put it under the control of the firmware, by invoking > the _DSM method, and preserving the firmware configuration only when it > returns 0. > > Patch #1 is a preparatory bugfix that solves the issue that I/O bridge > windows starting at 0x0 are dismissed when looking for parent resources. > > Patch #2 adds the logic to invoke the _DSM and claim the existing > configuration rather than reallocate it from scratch if it returns '0' > > Ard Biesheuvel (2): > drivers: pci: do not disregard parent resources starting at 0x0 > arm64: acpi/pci: invoke _DSM whether to preserve firmware PCI setup > > arch/arm64/kernel/pci.c | 20 ++++++++++++++++++-- > drivers/pci/pci.c | 2 +- > include/linux/pci-acpi.h | 7 ++++--- > 3 files changed, 23 insertions(+), 6 deletions(-) I applied the first to pci/resource for v4.13. I didn't do anything with the second because I don't think we have consensus on what the right thing to do is yet.
