Commit 16558e4d authored by Zachary Zhang's avatar Zachary Zhang Committed by Greg Kroah-Hartman
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PCI: aardvark: Size bridges before resources allocation

commit 91a2968e upstream.

The PCIE I/O and MEM resource allocation mechanism is that root bus
goes through the following steps:

1. Check PCI bridges' range and computes I/O and Mem base/limits.

2. Sort all subordinate devices I/O and MEM resource requirements and
   allocate the resources and writes/updates subordinate devices'
   requirements to PCI bridges I/O and Mem MEM/limits registers.

Currently, PCI Aardvark driver only handles the second step and lacks
the first step, so there is an I/O and MEM resource allocation failure
when using a PCI switch. This commit fixes that by sizing bridges
before doing the resource allocation.

Fixes: 8c39d710

 ("PCI: aardvark: Add Aardvark PCI host controller
Signed-off-by: default avatarZachary Zhang <>
[Thomas: edit commit log.]
Signed-off-by: default avatarThomas Petazzoni <>
Signed-off-by: default avatarLorenzo Pieralisi <>
Cc: <>
Signed-off-by: default avatarGreg Kroah-Hartman <>
parent dabfad3c
......@@ -952,6 +952,7 @@ static int advk_pcie_probe(struct platform_device *pdev)
bus = bridge->bus;
list_for_each_entry(child, &bus->children, node)
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