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| author | Keith Busch <keith.busch@intel.com> | 2016-07-21 21:40:28 -0600 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2016-07-25 12:52:47 -0500 |
| commit | e16b46605960bd071a3e26f316e0bb600ae91e37 (patch) | |
| tree | cbddd9ca52a24d2a414c48e375d89f8c36596087 /include/linux/pci.h | |
| parent | af8c34ce6ae32addda3788d54a7e340cad22516b (diff) | |
| download | linux-e16b46605960bd071a3e26f316e0bb600ae91e37.tar.gz linux-e16b46605960bd071a3e26f316e0bb600ae91e37.tar.bz2 linux-e16b46605960bd071a3e26f316e0bb600ae91e37.zip | |
PCI: Allow additional bus numbers for hotplug bridges
A user may hot add a switch requiring more than one bus to enumerate. This
previously required a system reboot if BIOS did not sufficiently pad the
bus resource, which they frequently don't do.
Add a kernel parameter so a user can specify the minimum number of bus
numbers to reserve for a hotplug bridge's subordinate buses so rebooting
won't be necessary.
The default is 1, which is equivalent to previous behavior.
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'include/linux/pci.h')
| -rw-r--r-- | include/linux/pci.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h index b67e4df20801..0c283254111d 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1706,6 +1706,7 @@ extern u8 pci_cache_line_size; extern unsigned long pci_hotplug_io_size; extern unsigned long pci_hotplug_mem_size; +extern unsigned long pci_hotplug_bus_size; /* Architecture-specific versions may override these (weak) */ void pcibios_disable_device(struct pci_dev *dev); |