linux-kernel - [PATCH v9 0/5] Simplify PCIe native ownership detection logic

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Message-Id: <cover.1600457297.git.sathyanarayanan.kuppuswamy@linux.intel.com>
Date:   Tue, 22 Sep 2020 13:54:27 -0700
From:   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 v9 0/5] Simplify PCIe native ownership detection logic

From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>

Currently, PCIe capabilities ownership status is detected by
verifying the status of pcie_ports_native, pcie_ports_dpc_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,
pcie_ports_dpc_native parameters.

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.
 

Kuppuswamy Sathyanarayanan (5):
  PCI: Conditionally initialize host bridge native_* members
  ACPI/PCI: Ignore _OSC negotiation result if pcie_ports_native is set.
  ACPI/PCI: Ignore _OSC DPC negotiation result if pcie_ports_dpc_native
    is set.
  PCI/portdrv: Remove redundant pci_aer_available() check in DPC enable
    logic
  PCI/DPC: Move AER/DPC dependency checks out of DPC driver

 drivers/acpi/pci_root.c           | 37 ++++++++++++++++++++++---------
 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.h        |  2 --
 drivers/pci/pcie/portdrv_core.c   | 13 +++++------
 drivers/pci/probe.c               |  6 +++--
 include/linux/acpi.h              |  2 ++
 include/linux/pci.h               |  2 ++
 10 files changed, 42 insertions(+), 30 deletions(-)

-- 
2.17.1