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| author | Gavin Shan <gwshan@linux.vnet.ibm.com> | 2016-05-03 08:41:39 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2016-05-11 14:54:24 +0300 |
| commit | 6384d97780c123d2e167242862ed4ea9051210e4 (patch) | |
| tree | 63c873c2e959aa2e63eeef7d93c752662c12ec34 /arch/powerpc/kernel/pci-hotplug.c | |
| parent | 3773dd258e91e1e14d95cdf17b9d83a1a7b27af1 (diff) | |
| download | linux-6384d97780c123d2e167242862ed4ea9051210e4.tar.xz | |
powerpc/pci: Move pci_find_bus_by_node() around
This moves pci_find_bus_by_node() from arch/powerpc/platforms/
pseries/pci_dlpar.c to arch/powerpc/kernel/pci-hotplug.c so that
the function can be used by pSeries and PowerNV platform at the
same time. Also, below cleanup applied. No functional changes
introduced.
* Remove variable "busdn" in find_bus_among_children()
* Use PCI_DN() to convert device node to pci_dn
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/pci-hotplug.c')
| -rw-r--r-- | arch/powerpc/kernel/pci-hotplug.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/pci-hotplug.c b/arch/powerpc/kernel/pci-hotplug.c index 2d108e541819..46587a14dd94 100644 --- a/arch/powerpc/kernel/pci-hotplug.c +++ b/arch/powerpc/kernel/pci-hotplug.c @@ -21,6 +21,35 @@ #include <asm/firmware.h> #include <asm/eeh.h> +static struct pci_bus *find_bus_among_children(struct pci_bus *bus, + struct device_node *dn) +{ + struct pci_bus *child = NULL; + struct pci_bus *tmp; + + if (pci_bus_to_OF_node(bus) == dn) + return bus; + + list_for_each_entry(tmp, &bus->children, node) { + child = find_bus_among_children(tmp, dn); + if (child) + break; + } + + return child; +} + +struct pci_bus *pci_find_bus_by_node(struct device_node *dn) +{ + struct pci_dn *pdn = PCI_DN(dn); + + if (!pdn || !pdn->phb || !pdn->phb->bus) + return NULL; + + return find_bus_among_children(pdn->phb->bus, dn); +} +EXPORT_SYMBOL_GPL(pci_find_bus_by_node); + /** * pcibios_release_device - release PCI device * @dev: PCI device |