A hotplugged bridge with many hotplug-capable ports may request
reserving more IO space than the machine has. This could be overridden
with the "hpiosize=" kernel argument though.
But when BARs are movable, there are no need to reserve space anymore:
new BARs are allocated not from reserved gaps, but via rearranging the
existing BARs. Requesting a precise amount of space for bridge windows
increases the chances of adding the new bridge successfully.
Signed-off-by: Sergey Miroshnichenko <s.miroshniche...@yadro.com>
---
drivers/pci/setup-bus.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 675a612236d7..a68ec726010e 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -1285,7 +1285,7 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct
list_head *realloc_head)
case PCI_HEADER_TYPE_BRIDGE:
pci_bridge_check_ranges(bus);
- if (bus->self->is_hotplug_bridge) {
+ if (bus->self->is_hotplug_bridge && !pci_can_move_bars) {
additional_io_size = pci_hotplug_io_size;
additional_mem_size = pci_hotplug_mem_size;
}
--
2.23.0
