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[PATCH] mmconfig: fix unreachable_devices()

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Currently, unreachable_devices() compares value of mmconfig and value
of conf1. But it doesn't check the device is reachable or not.

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andi Kleen <ak@suse.de>
This commit is contained in:
OGAWA Hirofumi 2007-02-13 13:26:20 +01:00 committed by Andi Kleen
parent 429d512e53
commit 56829d1982
4 changed files with 21 additions and 5 deletions
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12
arch/i386/pci/mmconfig-shared.c
View File

@ -43,12 +43,14 @@ static void __init unreachable_devices(void)
if (val1 == 0xffffffff)
continue;
raw_pci_ops->read(0, bus, devfn, 0, 4, &val2);
if (val1 != val2) {
set_bit(i + 32 * bus, pci_mmcfg_fallback_slots);
printk(KERN_NOTICE "PCI: No mmconfig possible"
" on device %02x:%02x\n", bus, i);
if (pci_mmcfg_arch_reachable(0, bus, devfn)) {
raw_pci_ops->read(0, bus, devfn, 0, 4, &val2);
if (val1 == val2)
continue;
}
set_bit(i + 32 * bus, pci_mmcfg_fallback_slots);
printk(KERN_NOTICE "PCI: No mmconfig possible on device"
" %02x:%02x\n", bus, i);
}
}
}

6
arch/i386/pci/mmconfig.c
View File

@ -136,6 +136,12 @@ static struct pci_raw_ops pci_mmcfg = {
.write = pci_mmcfg_write,
};
int __init pci_mmcfg_arch_reachable(unsigned int seg, unsigned int bus,
unsigned int devfn)
{
return get_base_addr(seg, bus, devfn) != 0;
}
int __init pci_mmcfg_arch_init(void)
{
printk(KERN_INFO "PCI: Using MMCONFIG\n");

2
arch/i386/pci/pci.h
View File

@ -101,4 +101,6 @@ extern void pcibios_sort(void);
#define PCI_MMCFG_MAX_CHECK_BUS 16
extern DECLARE_BITMAP(pci_mmcfg_fallback_slots, 32*PCI_MMCFG_MAX_CHECK_BUS);
extern int __init pci_mmcfg_arch_reachable(unsigned int seg, unsigned int bus,
unsigned int devfn);
extern int __init pci_mmcfg_arch_init(void);

6
arch/x86_64/pci/mmconfig.c
View File

@ -126,6 +126,12 @@ static void __iomem * __init mcfg_ioremap(struct acpi_mcfg_allocation *cfg)
return addr;
}
int __init pci_mmcfg_arch_reachable(unsigned int seg, unsigned int bus,
unsigned int devfn)
{
return pci_dev_base(seg, bus, devfn) != NULL;
}
int __init pci_mmcfg_arch_init(void)
{
int i;