--- linux-2.6.20/arch/ia64/kernel/quirks.c	1969-12-31 19:00:00.000000000 -0500

+++ linux-2.6.20_fix/arch/ia64/kernel/quirks.c	2007-02-13 13:56:34.000000000 -0500

@@ -0,0 +1,45 @@

+/*

+ * This file contains work-arounds for ia64 platform bugs.

+ */

+#include <linux/pci.h>

+

+/*

+ * quirk_intel_ide_controller: If an ide/ata controller is

+ * at legacy mode, BIOS might initiates BAR(bar 0~3 and 5)

+ * with incorrect value. This quirk will reset the incorrect

+ * value to 0.

+ */

+static void __devinit quirk_intel_ide_controller(struct pci_dev *dev)

+{

+	unsigned int pos;

+	struct resource *res;

+	int fixed = 0;

+	u8 tmp8;

+

+	if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE)

+		return;

+

+	/* TODO: What if one channel is in native mode ... */

+	pci_read_config_byte(dev, PCI_CLASS_PROG, &tmp8);

+	if ((tmp8 & 5) == 5)

+		return;

+

+	for( pos = 0; pos < 6; pos ++ ) {

+		res = &dev->resource[pos];

+		if (!(res->flags & (IORESOURCE_IO | IORESOURCE_MEM)))

+			continue;

+

+		if (!res->start && res->end) {

+			res->start = res->end = 0;

+			res->flags = 0;

+			fixed = 1;

+		}

+	}

+	if (fixed)

+		printk(KERN_WARNING

+			"PCI device %s: BIOS resource configuration fixed.\n",

+			pci_name(dev));

+}

+

+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_11, quirk_intel_ide_controller);

+

--- linux-2.6.21.noarch/arch/ia64/kernel/Makefile~	2007-05-27 23:23:36.000000000 -0400

+++ linux-2.6.21.noarch/arch/ia64/kernel/Makefile	2007-05-27 23:23:48.000000000 -0400

@@ -33,6 +33,7 @@ obj-$(CONFIG_CRASH_DUMP)	+= crash_dump.o

 obj-$(CONFIG_IA64_UNCACHED_ALLOCATOR)	+= uncached.o

 obj-$(CONFIG_AUDIT)		+= audit.o

 obj-$(CONFIG_PCI_MSI)		+= msi_ia64.o

+obj-$(CONFIG_PCI)		+= quirks.o

 mca_recovery-y			+= mca_drv.o mca_drv_asm.o

 obj-$(CONFIG_IA64_MC_ERR_INJECT)+= err_inject.o