PCI: X86: Introduce and enable PCI domain support
* fix bug in pci_read() and pci_write() which prevented PCI domain
support from working (hardcoded domain 0).
* unconditionally enable CONFIG_PCI_DOMAINS
* implement pci_domain_nr() and pci_proc_domain(), as required of
all arches when CONFIG_PCI_DOMAINS is enabled.
* store domain in struct pci_sysdata, as assigned by ACPI
* support "pci=nodomains"
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index c6fd3a6..27a391d 100644
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -189,6 +189,12 @@
dmi_check_system(acpi_pciprobe_dmi_table);
+ if (domain && !pci_domains_supported) {
+ printk(KERN_WARNING "PCI: Multiple domains not supported "
+ "(dom %d, bus %d)\n", domain, busnum);
+ return NULL;
+ }
+
/* Allocate per-root-bus (not per bus) arch-specific data.
* TODO: leak; this memory is never freed.
* It's arguable whether it's worth the trouble to care.
@@ -199,12 +205,7 @@
return NULL;
}
- if (domain != 0) {
- printk(KERN_WARNING "PCI: Multiple domains not supported\n");
- kfree(sd);
- return NULL;
- }
-
+ sd->domain = domain;
sd->node = -1;
pxm = acpi_get_pxm(device->handle);