linux-kernel - [PATCH v13 0/5] Simplify PCIe native ownership

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Message-Id: <cover.1611364024.git.sathyanarayanan.kuppuswamy@linux.intel.com>
Date:   Fri, 22 Jan 2021 17:11:08 -0800
From:   Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>
To:     bhelgaas@...gle.com
Cc:     linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        ashok.raj@...el.com, sathyanarayanan.kuppuswamy@...ux.intel.com
Subject: [PATCH v13 0/5] Simplify PCIe native ownership

Currently, PCIe capabilities ownership status is detected by
verifying the status of pcie_ports_native, and _OSC negotiated
results (cached in  struct pci_host_bridge->native_* members).
But this logic can be simplified, and we can use only struct
pci_host_bridge ->native_* members to detect it. 

This patchset removes the distributed checks for pcie_ports_native,
parameter.

Changes since v12:
 * Rebased on top of v5.11-rc1

Changes since v11 (Bjorns update):
 * Add bugfix for DPC with no AER Capability
 * Split OSC_OWNER trivial changes from pcie_ports_native changes
 * Temporarily drop pcie_ports_dpc_native changes (revisit it later).

Changes since v10:
 * Addressed format issue reported by lkp test.

Changes since v9:
 * Rebased on top of v5.10-rc1

Changes since v8:
 * Simplified setting _OSC ownwership logic
 * Moved bridge->native_ltr out of #ifdef CONFIG_PCIEPORTBUS.

Changes since v7:
 * Fixed "fix array_size.cocci warnings".

Changes since v6:
 * Created new patch for CONFIG_PCIEPORTBUS check in
   pci_init_host_bridge().
 * Added warning message for a case when pcie_ports_native
   overrides _OSC negotiation result.

Changes since v5:
 * Rebased on top of v5.8-rc1

Changes since v4:
 * Changed the patch set title (Original link: https://lkml.org/lkml/2020/5/26/1710)
 * Added AER/DPC dependency logic cleanup fixes.

Bjorn Helgaas (2):
  PCI/DPC: Ignore devices with no AER Capability
  PCI/ACPI: Centralize pci_aer_available() checking

Kuppuswamy Sathyanarayanan (3):
  PCI: Assume control of portdrv-related features only when portdrv
    enabled
  PCI/ACPI: Tidy _OSC control bit checking
  PCI/ACPI: Centralize pcie_ports_native checking

 drivers/acpi/pci_root.c           | 49 ++++++++++++++++++++++++-------
 drivers/pci/hotplug/pciehp_core.c |  2 +-
 drivers/pci/pci-acpi.c            |  3 --
 drivers/pci/pcie/aer.c            |  2 +-
 drivers/pci/pcie/dpc.c            |  3 ++
 drivers/pci/pcie/portdrv_core.c   | 11 +++----
 drivers/pci/probe.c               |  6 ++--
 7 files changed, 51 insertions(+), 25 deletions(-)

-- 
2.25.1