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PCI: pciehp: Make pciehp_is_native() stricter

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Previously pciehp_is_native() returned true for any PCI device in a
hierarchy where _OSC says we can use pciehp.  This is incorrect because
bridges without PCI_EXP_SLTCAP_HPC capability should be managed by acpiphp
instead.

Improve pciehp_is_native() to return true only when PCI_EXP_SLTCAP_HPC is
set and the pciehp driver is present.  In any other case return false
to let acpiphp handle those.

Suggested-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
[bhelgaas: remove NULL pointer check]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Mika Westerberg
2018-05-23 17:24:08 -05:00
committed by Bjorn Helgaas
parent 9310f0dc1c
commit 5352a44a56
4 changed files with 18 additions and 16 deletions
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2
include/linux/pci.h
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@@ -1454,8 +1454,10 @@ static inline int pci_irqd_intx_xlate(struct irq_domain *d,
#ifdef CONFIG_PCIEPORTBUS
extern bool pcie_ports_disabled;
extern bool pcie_ports_native;
#else
#define pcie_ports_disabled true
#define pcie_ports_native false
#endif
#ifdef CONFIG_PCIEASPM