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PCI: Make resetting secondary bus logic common

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Commit d92a208d08 ("powerpc/pci: Mask linkDown on resetting PCI bus")
implemented same logic (resetting PCI secondary bus by bridge's config
register PCI_BRIDGE_CTL_BUS_RESET) in PCI core and arch-dependent code.  To
avoid the duplication, move the logic to pci_reset_secondary_bus().

That commit did not declare the pcibios_reset_secondary_bus() interface in
linux/include/pci.h.  Add the declaration.

No functional change.

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Gavin Shan 2014-06-19 17:22:44 +10:00 committed by Bjorn Helgaas
parent 7171511eae
commit 9e33002fd1
2 changed files with 8 additions and 1 deletions
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7
drivers/pci/pci.c
View file

@ -3193,7 +3193,7 @@ static int pci_pm_reset(struct pci_dev *dev, int probe)
return 0;
}
void __weak pcibios_reset_secondary_bus(struct pci_dev *dev)
void pci_reset_secondary_bus(struct pci_dev *dev)
{
u16 ctrl;
@ -3219,6 +3219,11 @@ void __weak pcibios_reset_secondary_bus(struct pci_dev *dev)
ssleep(1);
}
void __weak pcibios_reset_secondary_bus(struct pci_dev *dev)
{
pci_reset_secondary_bus(dev);
}
/**
* pci_reset_bridge_secondary_bus - Reset the secondary bus on a PCI bridge.
* @dev: Bridge device

2
include/linux/pci.h
View file

@ -978,6 +978,8 @@ int pci_try_reset_slot(struct pci_slot *slot);
int pci_probe_reset_bus(struct pci_bus *bus);
int pci_reset_bus(struct pci_bus *bus);
int pci_try_reset_bus(struct pci_bus *bus);
void pci_reset_secondary_bus(struct pci_dev *dev);
void pcibios_reset_secondary_bus(struct pci_dev *dev);
void pci_reset_bridge_secondary_bus(struct pci_dev *dev);
void pci_update_resource(struct pci_dev *dev, int resno);
int __must_check pci_assign_resource(struct pci_dev *dev, int i);