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PCI: Let pcibios_root_bridge_prepare() access bridge->windows 

When pci_register_host_bridge() is called, bridge->windows are already
available. However these windows are being moved temporarily from there.

To let pcibios_root_bridge_prepare() have access to these windows, move the
windows movement after calling this function. This is useful for the MIPS
ralink mt7621 platform so it can set up I/O coherence units and avoid
custom MIPS code in the mt7621 PCIe controller driver.

Link: https://lore.kernel.org/r/20211207104924.21327-2-sergio.paracuellos@gmail.com
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Sergio Paracuellos 2021-12-07 11:49:20 +01:00 committed by Bjorn Helgaas
parent da48157092
commit 661c4c4f26
1 changed files with 2 additions and 2 deletions
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4
drivers/pci/probe.c
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@ -898,8 +898,6 @@ static int pci_register_host_bridge(struct pci_host_bridge *bridge)
bridge->bus = bus;
/* Temporarily move resources off the list */
list_splice_init(&bridge->windows, &resources);
bus->sysdata = bridge->sysdata;
bus->ops = bridge->ops;
bus->number = bus->busn_res.start = bridge->busnr;
@ -925,6 +923,8 @@ static int pci_register_host_bridge(struct pci_host_bridge *bridge)
if (err)
goto free;
/* Temporarily move resources off the list */
list_splice_init(&bridge->windows, &resources);
err = device_add(&bridge->dev);
if (err) {
put_device(&bridge->dev);