mirror of
https://github.com/torvalds/linux
synced 2024-10-22 19:25:51 +00:00
7c67470009
The current logic in arm64 pci_bus_assign_domain_nr() is flawed in that depending on the host controller configuration for a platform and the initialization sequence, core code may end up allocating PCI domain numbers from both DT and the generic domain counter, which would result in PCI domain allocation aliases/errors. Fix the logic behind the PCI domain number assignment and move the resulting code to the PCI core so the same domain allocation logic is used on all platforms that select CONFIG_PCI_DOMAINS_GENERIC. [bhelgaas: tidy changelog] Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Liviu Dudau <Liviu.Dudau@arm.com> Acked-by: Arnd Bergmann <arnd@arndb.de> CC: Rob Herring <robh+dt@kernel.org> CC: Catalin Marinas <catalin.marinas@arm.com>
49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
/*
|
|
* Code borrowed from powerpc/kernel/pci-common.c
|
|
*
|
|
* Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM
|
|
* Copyright (C) 2014 ARM Ltd.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* version 2 as published by the Free Software Foundation.
|
|
*
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/io.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/of_pci.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <asm/pci-bridge.h>
|
|
|
|
/*
|
|
* Called after each bus is probed, but before its children are examined
|
|
*/
|
|
void pcibios_fixup_bus(struct pci_bus *bus)
|
|
{
|
|
/* nothing to do, expected to be removed in the future */
|
|
}
|
|
|
|
/*
|
|
* We don't have to worry about legacy ISA devices, so nothing to do here
|
|
*/
|
|
resource_size_t pcibios_align_resource(void *data, const struct resource *res,
|
|
resource_size_t size, resource_size_t align)
|
|
{
|
|
return res->start;
|
|
}
|
|
|
|
/*
|
|
* Try to assign the IRQ number from DT when adding a new device
|
|
*/
|
|
int pcibios_add_device(struct pci_dev *dev)
|
|
{
|
|
dev->irq = of_irq_parse_and_map_pci(dev, 0, 0);
|
|
|
|
return 0;
|
|
}
|