linux-kernel - [PATCH v13 2/5] PCI: Assume control of portdrv-related features only when portdrv enabled

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Message-Id: <a36cd1bfdca9bfdff8130d3a99a3aae6cae926c5.1611364025.git.sathyanarayanan.kuppuswamy@linux.intel.com>
Date:   Fri, 22 Jan 2021 17:11:10 -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 2/5] PCI: Assume control of portdrv-related features only when portdrv enabled

Native control of PME, AER, DPC, and PCIe hotplug depends on the portdrv,
so default to native handling of them only when CONFIG_PCIEPORTBUS is
enabled.

Native control LTR and SHPC hotplug does not depend on portdrv, so we can
always take control of them unless some platform interface, e.g., _OSC,
tells us otherwise.

[bhelgaas: commit log]
Link: https://lore.kernel.org/r/fcbe8a624166a1101a755edfef44a185d32ff493.1603766889.git.sathyanarayanan.kuppuswamy@linux.intel.com
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
---
 drivers/pci/probe.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 953f15abc850..97498f61f5ad 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -588,12 +588,14 @@ static void pci_init_host_bridge(struct pci_host_bridge *bridge)
 	 * may implement its own AER handling and use _OSC to prevent the
 	 * OS from interfering.
 	 */
+#ifdef CONFIG_PCIEPORTBUS
 	bridge->native_aer = 1;
 	bridge->native_pcie_hotplug = 1;
-	bridge->native_shpc_hotplug = 1;
 	bridge->native_pme = 1;
-	bridge->native_ltr = 1;
 	bridge->native_dpc = 1;
+#endif
+	bridge->native_ltr = 1;
+	bridge->native_shpc_hotplug = 1;
 
 	device_initialize(&bridge->dev);
 }
-- 
2.25.1