diff options
| author | Alex Williamson <alex.williamson@redhat.com> | 2013-08-14 14:06:05 -0600 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2013-08-15 11:38:45 -0600 |
| commit | 9a3d2b9beefd5b07c1d8f70ded01b88f203ee304 (patch) | |
| tree | 51aba33f4963d835195368743e31d116e3493199 | |
| parent | 1b95ce8fc9c12fdb60047f2f9950f29e76e7c66d (diff) | |
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>
| -rw-r--r-- | drivers/pci/pci.c | 24 | ||||
| -rw-r--r-- | include/linux/pci.h | 2 |
2 files changed, 26 insertions, 0 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index ea5e7048617..7f89372483d 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -3610,6 +3610,18 @@ static int pci_slot_reset(struct pci_slot *slot, int probe) } /** + * pci_probe_reset_slot - probe whether a PCI slot can be reset + * @slot: PCI slot to probe + * + * Return 0 if slot can be reset, negative if a slot reset is not supported. + */ +int pci_probe_reset_slot(struct pci_slot *slot) +{ + return pci_slot_reset(slot, 1); +} +EXPORT_SYMBOL_GPL(pci_probe_reset_slot); + +/** * pci_reset_slot - reset a PCI slot * @slot: PCI slot to reset * @@ -3662,6 +3674,18 @@ static int pci_bus_reset(struct pci_bus *bus, int probe) } /** + * pci_probe_reset_bus - probe whether a PCI bus can be reset + * @bus: PCI bus to probe + * + * Return 0 if bus can be reset, negative if a bus reset is not supported. + */ +int pci_probe_reset_bus(struct pci_bus *bus) +{ + return pci_bus_reset(bus, 1); +} +EXPORT_SYMBOL_GPL(pci_probe_reset_bus); + +/** * pci_reset_bus - reset a PCI bus * @bus: top level PCI bus to reset * diff --git a/include/linux/pci.h b/include/linux/pci.h index 1a8fd3464da..daf40cd851d 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -924,7 +924,9 @@ int pcie_set_mps(struct pci_dev *dev, int mps); int __pci_reset_function(struct pci_dev *dev); int __pci_reset_function_locked(struct pci_dev *dev); int pci_reset_function(struct pci_dev *dev); +int pci_probe_reset_slot(struct pci_slot *slot); int pci_reset_slot(struct pci_slot *slot); +int pci_probe_reset_bus(struct pci_bus *bus); int pci_reset_bus(struct pci_bus *bus); void pci_reset_bridge_secondary_bus(struct pci_dev *dev); void pci_update_resource(struct pci_dev *dev, int resno); |