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PCI/ASPM: Add pcie_aspm_enabled()

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Add a function checking whether or not PCIe ASPM has been enabled for
a given device.

It will be used by the NVMe driver to decide how to handle the
device during system suspend.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Rafael J. Wysocki
2019-08-09 10:23:57 +02:00
parent d45331b00d
commit accd2dd72c
2 changed files with 22 additions and 0 deletions
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2
include/linux/pci.h
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@@ -1567,8 +1567,10 @@ extern bool pcie_ports_native;
#ifdef CONFIG_PCIEASPM
bool pcie_aspm_support_enabled(void);
bool pcie_aspm_enabled(struct pci_dev *pdev);
#else
static inline bool pcie_aspm_support_enabled(void) { return false; }
static inline bool pcie_aspm_enabled(struct pci_dev *pdev) { return false; }
#endif
#ifdef CONFIG_PCIEAER