PCI: Add pci_probe_reset_slot() and pci_probe_reset_bus()
Users of pci_reset_bus() and pci_reset_slot() need a way to probe whether the bus or slot supports reset. Add trivial helper functions and export them as vfio-pci will make use of these. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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@ -3609,6 +3609,18 @@ static int pci_slot_reset(struct pci_slot *slot, int probe)
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return rc;
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}
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/**
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* pci_probe_reset_slot - probe whether a PCI slot can be reset
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* @slot: PCI slot to probe
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*
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* Return 0 if slot can be reset, negative if a slot reset is not supported.
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*/
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int pci_probe_reset_slot(struct pci_slot *slot)
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{
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return pci_slot_reset(slot, 1);
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}
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EXPORT_SYMBOL_GPL(pci_probe_reset_slot);
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/**
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* pci_reset_slot - reset a PCI slot
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* @slot: PCI slot to reset
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@ -3661,6 +3673,18 @@ static int pci_bus_reset(struct pci_bus *bus, int probe)
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return 0;
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}
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/**
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* pci_probe_reset_bus - probe whether a PCI bus can be reset
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* @bus: PCI bus to probe
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*
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* Return 0 if bus can be reset, negative if a bus reset is not supported.
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*/
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int pci_probe_reset_bus(struct pci_bus *bus)
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{
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return pci_bus_reset(bus, 1);
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}
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EXPORT_SYMBOL_GPL(pci_probe_reset_bus);
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/**
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* pci_reset_bus - reset a PCI bus
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* @bus: top level PCI bus to reset
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@ -924,7 +924,9 @@ int pcie_set_mps(struct pci_dev *dev, int mps);
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int __pci_reset_function(struct pci_dev *dev);
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int __pci_reset_function_locked(struct pci_dev *dev);
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int pci_reset_function(struct pci_dev *dev);
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int pci_probe_reset_slot(struct pci_slot *slot);
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int pci_reset_slot(struct pci_slot *slot);
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int pci_probe_reset_bus(struct pci_bus *bus);
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int pci_reset_bus(struct pci_bus *bus);
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void pci_reset_bridge_secondary_bus(struct pci_dev *dev);
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void pci_update_resource(struct pci_dev *dev, int resno);
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