diff options
| author | Yinghai Lu <yinghai@kernel.org> | 2012-05-18 13:46:34 -0600 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2012-06-13 15:42:26 -0600 |
| commit | a8e4b9c101ae58cc64cda0201229d3318701a7f0 (patch) | |
| tree | e97410734e1b8d889c7a1d90e29a3f6efc2d860b /drivers | |
| parent | 85019faf4a88477cc72f56b6e371955ea0bb7a2a (diff) | |
PCI: add generic pci_hp_add_bridge()
This creates a generic pci_hp_add_bridge() that can be used by several
hotplug drivers.
[bhelgaas: split out from pciehp patch]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/pci/hotplug-pci.c | 23 | ||||
| -rw-r--r-- | drivers/pci/pci.h | 1 |
2 files changed, 24 insertions, 0 deletions
diff --git a/drivers/pci/hotplug-pci.c b/drivers/pci/hotplug-pci.c index d3509cdeb55..44088c4fe68 100644 --- a/drivers/pci/hotplug-pci.c +++ b/drivers/pci/hotplug-pci.c @@ -4,6 +4,29 @@ #include <linux/export.h> #include "pci.h" +int __ref pci_hp_add_bridge(struct pci_dev *dev) +{ + struct pci_bus *parent = dev->bus; + int pass, busnr, start = parent->busn_res.start; + int end = parent->busn_res.end; + + for (busnr = start; busnr <= end; busnr++) { + if (!pci_find_bus(pci_domain_nr(parent), busnr)) + break; + } + if (busnr-- > end) { + printk(KERN_ERR "No bus number available for hot-added bridge %s\n", + pci_name(dev)); + return -1; + } + for (pass = 0; pass < 2; pass++) + busnr = pci_scan_bridge(parent, dev, busnr, pass); + if (!dev->subordinate) + return -1; + + return 0; +} +EXPORT_SYMBOL_GPL(pci_hp_add_bridge); unsigned int __devinit pci_do_scan_bus(struct pci_bus *bus) { diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index e4943479b23..f3e14ce8eab 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -124,6 +124,7 @@ static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; } #endif /* Functions for PCI Hotplug drivers to use */ +int pci_hp_add_bridge(struct pci_dev *dev); extern unsigned int pci_do_scan_bus(struct pci_bus *bus); #ifdef HAVE_PCI_LEGACY |