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39 lines
1.4 KiB
Diff
39 lines
1.4 KiB
Diff
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From: Sergio Paracuellos <sergio.paracuellos@gmail.com>
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Date: Tue, 7 Dec 2021 11:49:20 +0100
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Subject: [PATCH] PCI: Let pcibios_root_bridge_prepare() access bridge->windows
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When pci_register_host_bridge() is called, bridge->windows are already
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available. However these windows are being moved temporarily from there.
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To let pcibios_root_bridge_prepare() have access to these windows, move the
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windows movement after calling this function. This is useful for the MIPS
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ralink mt7621 platform so it can set up I/O coherence units and avoid
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custom MIPS code in the mt7621 PCIe controller driver.
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Link: https://lore.kernel.org/r/20211207104924.21327-2-sergio.paracuellos@gmail.com
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Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
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Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Acked-by: Arnd Bergmann <arnd@arndb.de>
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---
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--- a/drivers/pci/probe.c
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+++ b/drivers/pci/probe.c
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@@ -898,8 +898,6 @@ static int pci_register_host_bridge(stru
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bridge->bus = bus;
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- /* Temporarily move resources off the list */
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- list_splice_init(&bridge->windows, &resources);
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bus->sysdata = bridge->sysdata;
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bus->ops = bridge->ops;
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bus->number = bus->busn_res.start = bridge->busnr;
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@@ -925,6 +923,8 @@ static int pci_register_host_bridge(stru
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if (err)
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goto free;
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+ /* Temporarily move resources off the list */
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+ list_splice_init(&bridge->windows, &resources);
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err = device_add(&bridge->dev);
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if (err) {
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put_device(&bridge->dev);
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