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PCI: Add generic pcie_wait_for_link() interface

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Clients such as hotplug and Downstream Port Containment (DPC) both need to
wait until a link becomes active or inactive.

Add a generic pcie_wait_link_active() interface and use it instead of
duplicating the code.

Signed-off-by: Oza Pawandeep <poza@codeaurora.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Keith Busch <keith.busch@intel.com>
This commit is contained in:
Oza Pawandeep
2018-05-17 16:44:11 -05:00
committed by Bjorn Helgaas
parent 2af8641b2a
commit 9f5a70f18c
4 changed files with 34 additions and 28 deletions
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drivers/pci/pci.h
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@ -353,6 +353,7 @@ static inline resource_size_t pci_resource_alignment(struct pci_dev *dev,
void pci_enable_acs(struct pci_dev *dev);
bool pcie_wait_for_link(struct pci_dev *pdev, bool active);
#ifdef CONFIG_PCIEASPM
void pcie_aspm_init_link_state(struct pci_dev *pdev);
void pcie_aspm_exit_link_state(struct pci_dev *pdev);