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authorAlex Williamson <alex.williamson@redhat.com>2013-08-14 14:06:05 -0600
committerBjorn Helgaas <bhelgaas@google.com>2013-08-15 11:38:45 -0600
commit9a3d2b9beefd5b07c1d8f70ded01b88f203ee304 (patch)
tree51aba33f4963d835195368743e31d116e3493199 /drivers/pci
parent1b95ce8fc9c12fdb60047f2f9950f29e76e7c66d (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>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/pci.c24
1 files changed, 24 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
*