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SubjectRe: [PATCH 2/2] pci: pciehp update the slot bridge res to get big range for pcie devices - v9
* Yinghai Lu <>:
> move out bus_size_bridges and assign resources out of pciehp_add_bridge()
> and at last do them all together one time including slot bridge, to avoid to
> call assign resources several times, when there are several bridges under the
> slot bridge.
> need to introduce pci_bridge_assign_resources there.
> handle the case the slot bridge that doesn't get pre-allocated big enough res
> from FW.
> for example pcie devices need 256M, but the bridge only get preallocated 2M...
> pci_setup_bridge() will take extra check_enabled for the slot bridge, otherwise
> update res is not updated to bridge BAR. that is bridge is enabled already for
> port service.
> v2: address Alex's concern about pci remove/rescan feature about
> pci_setup_bridge changes.
> v3: Kenji pointed out that pci_config_slot need to be called before
> pci_bus_add_devices()
> v4: move out pci_is_enabled checkout of pci_setup_bridge()
> v5: change the applying sequence.
> v6: change the functions name according to Jesse
> v8: address Eric's concern, only overwrite leaf bridge resource that is not
> big enough
> v9: refresh to be applied after bjorn's patch, and remove trick about save
> size and restore resource second try.
> Signed-off-by: Yinghai Lu <>

How did you build and test this? I got this during building:

ERROR: "pci_assign_unassigned_bridge_resources" [drivers/pci/hotplug/pciehp.ko] undefined!
make[1]: *** [__modpost] Error 1
make: *** [modules] Error 2
make: *** Waiting for unfinished jobs....

This patch fixed it for me:
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 95fe3f4..2f15473 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -962,3 +962,4 @@ again:

goto again;

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