fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / arch / i386 / pci / direct.c

diff --git a/arch/i386/pci/direct.c b/arch/i386/pci/direct.c
index e3ac502..431c9a5 100644 (file)
--- a/arch/i386/pci/direct.c
+++ b/arch/i386/pci/direct.c
@@ -4,6 +4,7 @@
 
 #include <linux/pci.h>
 #include <linux/init.h>
+#include <linux/dmi.h>
 #include "pci.h"
 
 /*
@@ -18,8 +19,10 @@ int pci_conf1_read(unsigned int seg, unsigned int bus,
 {
        unsigned long flags;
 
-       if (!value || (bus > 255) || (devfn > 255) || (reg > 255))
+       if ((bus > 255) || (devfn > 255) || (reg > 255)) {
+               *value = -1;
                return -EINVAL;
+       }
 
        spin_lock_irqsave(&pci_config_lock, flags);
 
@@ -91,8 +94,10 @@ static int pci_conf2_read(unsigned int seg, unsigned int bus,
        unsigned long flags;
        int dev, fn;
 
-       if (!value || (bus > 255) || (devfn > 255) || (reg > 255))
+       if ((bus > 255) || (devfn > 255) || (reg > 255)) {
+               *value = -1;
                return -EINVAL;
+       }
 
        dev = PCI_SLOT(devfn);
        fn = PCI_FUNC(devfn);
@@ -188,6 +193,10 @@ static int __init pci_sanity_check(struct pci_raw_ops *o)
 
        if (pci_probe & PCI_NO_CHECKS)
                return 1;
+       /* Assume Type 1 works for newer systems.
+          This handles machines that don't have anything on PCI Bus 0. */
+       if (dmi_get_year(DMI_BIOS_DATE) >= 2001)
+               return 1;
 
        for (devfn = 0; devfn < 0x100; devfn++) {
                if (o->read(0, 0, devfn, PCI_CLASS_DEVICE, 2, &x))
@@ -245,7 +254,18 @@ static int __init pci_check_type2(void)
        return works;
 }
 
-static int __init pci_direct_init(void)
+void __init pci_direct_init(int type)
+{
+       if (type == 0)
+               return;
+       printk(KERN_INFO "PCI: Using configuration type %d\n", type);
+       if (type == 1)
+               raw_pci_ops = &pci_direct_conf1;
+       else
+               raw_pci_ops = &pci_direct_conf2;
+}
+
+int __init pci_direct_probe(void)
 {
        struct resource *region, *region2;
 
@@ -255,19 +275,16 @@ static int __init pci_direct_init(void)
        if (!region)
                goto type2;
 
-       if (pci_check_type1()) {
-               printk(KERN_INFO "PCI: Using configuration type 1\n");
-               raw_pci_ops = &pci_direct_conf1;
-               return 0;
-       }
+       if (pci_check_type1())
+               return 1;
        release_resource(region);
 
  type2:
        if ((pci_probe & PCI_PROBE_CONF2) == 0)
-               goto out;
+               return 0;
        region = request_region(0xCF8, 4, "PCI conf2");
        if (!region)
-               goto out;
+               return 0;
        region2 = request_region(0xC000, 0x1000, "PCI conf2");
        if (!region2)
                goto fail2;
@@ -275,15 +292,11 @@ static int __init pci_direct_init(void)
        if (pci_check_type2()) {
                printk(KERN_INFO "PCI: Using configuration type 2\n");
                raw_pci_ops = &pci_direct_conf2;
-               return 0;
+               return 2;
        }
 
        release_resource(region2);
  fail2:
        release_resource(region);
-
- out:
        return 0;
 }
-
-arch_initcall(pci_direct_init);