PCI: Allow additional bus numbers for hotplug bridges

[mirror_ubuntu-artful-kernel.git] / drivers / pci / pci.c

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index c8b4dbdd1bddae95c214e92b52492b82364afcaf..f18ea90cf91a4477483c5c94f8fa36c9bb3780eb 100644 (file)
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -81,6 +81,9 @@ unsigned long pci_cardbus_mem_size = DEFAULT_CARDBUS_MEM_SIZE;
 unsigned long pci_hotplug_io_size  = DEFAULT_HOTPLUG_IO_SIZE;
 unsigned long pci_hotplug_mem_size = DEFAULT_HOTPLUG_MEM_SIZE;
 
+#define DEFAULT_HOTPLUG_BUS_SIZE       1
+unsigned long pci_hotplug_bus_size = DEFAULT_HOTPLUG_BUS_SIZE;
+
 enum pcie_bus_config_types pcie_bus_config = PCIE_BUS_DEFAULT;
 
 /*
@@ -5021,6 +5024,11 @@ static int __init pci_setup(char *str)
                                pci_hotplug_io_size = memparse(str + 9, &str);
                        } else if (!strncmp(str, "hpmemsize=", 10)) {
                                pci_hotplug_mem_size = memparse(str + 10, &str);
+                       } else if (!strncmp(str, "hpbussize=", 10)) {
+                               pci_hotplug_bus_size =
+                                       simple_strtoul(str + 10, &str, 0);
+                               if (pci_hotplug_bus_size > 0xff)
+                                       pci_hotplug_bus_size = DEFAULT_HOTPLUG_BUS_SIZE;
                        } else if (!strncmp(str, "pcie_bus_tune_off", 17)) {
                                pcie_bus_config = PCIE_BUS_TUNE_OFF;
                        } else if (!strncmp(str, "pcie_bus_safe", 13)) {