[ACPI] enable 440GX PIRQ router workaround

arch/i386/kernel/dmi_scan.c

@@ -412,30 +412,6 @@ static __init int swab_apm_power_in_minutes(struct dmi_blacklist *d)
 	return 0;
 }
 
-/*
- * The Intel 440GX hall of shame. 
- *
- * On many (all we have checked) of these boxes the $PIRQ table is wrong.
- * The MP1.4 table is right however and so SMP kernels tend to work. 
- */
- 
-static __init int broken_pirq(struct dmi_blacklist *d)
-{
-
-	printk(KERN_INFO " *** Possibly defective BIOS detected (irqtable)\n");
-	printk(KERN_INFO " *** Many BIOSes matching this signature have incorrect IRQ routing tables.\n");
-	printk(KERN_INFO " *** If you see IRQ problems, in particular SCSI resets and hangs at boot\n");
-	printk(KERN_INFO " *** contact your hardware vendor and ask about updates.\n");
-	printk(KERN_INFO " *** Building an SMP kernel may evade the bug some of the time.\n");
-#ifdef CONFIG_X86_IO_APIC
-	{
-		extern int skip_ioapic_setup;
-		skip_ioapic_setup = 0;
-	}
-#endif
-	return 0;
-}
-
 /*
  * ASUS K7V-RM has broken ACPI table defining sleep modes
  */
@@ -811,52 +787,6 @@ static __initdata struct dmi_blacklist dmi_blacklist[]={
 			NO_MATCH, NO_MATCH
 			} },
 
-	/* Problem Intel 440GX bioses */
-
-	{ broken_pirq, "SABR1 Bios", {			/* Bad $PIR */
-			MATCH(DMI_BIOS_VENDOR, "Intel Corporation"),
-			MATCH(DMI_BIOS_VERSION,"SABR1"),
-			NO_MATCH, NO_MATCH
-			} },
-	{ broken_pirq, "l44GX Bios", {        		/* Bad $PIR */
-			MATCH(DMI_BIOS_VENDOR, "Intel Corporation"),
-			MATCH(DMI_BIOS_VERSION,"L440GX0.86B.0094.P10"),
-			NO_MATCH, NO_MATCH
-                        } },
-	{ broken_pirq, "l44GX Bios", {        		/* Bad $PIR */
-			MATCH(DMI_BIOS_VENDOR, "Intel Corporation"),
-			MATCH(DMI_BIOS_VERSION,"L440GX0.86B.0115.P12"),
-			NO_MATCH, NO_MATCH
-                        } },
-	{ broken_pirq, "l44GX Bios", {        		/* Bad $PIR */
-			MATCH(DMI_BIOS_VENDOR, "Intel Corporation"),
-			MATCH(DMI_BIOS_VERSION,"L440GX0.86B.0120.P12"),
-			NO_MATCH, NO_MATCH
-                        } },
-	{ broken_pirq, "l44GX Bios", {		/* Bad $PIR */
-			MATCH(DMI_BIOS_VENDOR, "Intel Corporation"),
-			MATCH(DMI_BIOS_VERSION,"L440GX0.86B.0125.P13"),
-			NO_MATCH, NO_MATCH
-			} },
-	{ broken_pirq, "l44GX Bios", {		/* Bad $PIR */
-			MATCH(DMI_BIOS_VENDOR, "Intel Corporation"),
-			MATCH(DMI_BIOS_VERSION,"L440GX0.86B.0066.P07.9906041405"),
-			NO_MATCH, NO_MATCH
-			} },
-
-	{ broken_pirq, "IBM xseries 370", {		/* Bad $PIR */
-			MATCH(DMI_BIOS_VENDOR, "IBM"),
-			MATCH(DMI_BIOS_VERSION,"MMKT33AUS"),
-			NO_MATCH, NO_MATCH
-			} },
-                        
-	/* Intel in disguise - In this case they can't hide and they don't run
-	   too well either... */
-	{ broken_pirq, "Dell PowerEdge 8450", {		/* Bad $PIR */
-			MATCH(DMI_PRODUCT_NAME, "Dell PowerEdge 8450"),
-			NO_MATCH, NO_MATCH, NO_MATCH
-			} },
-			
 	{ broken_acpi_Sx, "ASUS K7V-RM", {		/* Bad ACPI Sx table */
 			MATCH(DMI_BIOS_VERSION,"ASUS K7V-RM ACPI BIOS Revision 1003A"),
 			MATCH(DMI_BOARD_NAME, "<K7V-RM>"),

arch/i386/pci/irq.c

@@ -452,15 +452,12 @@ static int pirq_bios_set(struct pci_dev *router, struct pci_dev *dev, int pirq,
 
 static __init int intel_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
 {
-#if 0 /* Let's see what chip this is supposed to be ... */
-	/* We must not touch 440GX even if we have tables. 440GX has
-	   different IRQ routing weirdness */
+	/* 440GX has a proprietary PIRQ router -- don't use it */
 	if (	pci_find_device(PCI_VENDOR_ID_INTEL,
 				PCI_DEVICE_ID_INTEL_82443GX_0, NULL) ||
 		pci_find_device(PCI_VENDOR_ID_INTEL,
 				PCI_DEVICE_ID_INTEL_82443GX_2, NULL))
 		return 0;
-#endif
 
 	switch(device)
 	{