2 files changed, 18 insertions, 9 deletions

diff --git a/arch/ia64/sn/kernel/io_common.c b/arch/ia64/sn/kernel/io_common.c
index d4dd8f4b6b8..65979f1fb35 100644
--- a/arch/ia64/sn/kernel/io_common.c
+++ b/arch/ia64/sn/kernel/io_common.c
@@ -25,7 +25,6 @@
 #include "xtalk/xwidgetdev.h"
 #include <linux/acpi.h>
 #include <asm/sn/sn2/sn_hwperf.h>
-#include <asm/sn/acpi.h>
 
 extern void sn_init_cpei_timer(void);
 extern void register_sn_procfs(void);
@@ -37,7 +36,6 @@ extern void sn_legacy_pci_window_fixup(struct pci_controller *, u64, u64);
 extern void sn_io_acpi_init(void);
 extern void sn_io_init(void);
 
-
 static struct list_head sn_sysdata_list;
 
 /* sysdata list struct */
@@ -50,6 +48,15 @@ int sn_ioif_inited;		/* SN I/O infrastructure initialized? */
 
 struct sn_pcibus_provider *sn_pci_provider[PCIIO_ASIC_MAX_TYPES];	/* indexed by asic type */
 
+int sn_acpi_base_support()
+{
+	struct acpi_table_header *header;
+	(void)acpi_get_table_by_index(ACPI_TABLE_INDEX_DSDT, &header);
+	if (header && header->oem_revision >= 0x20101)
+		return 1;
+	return 0;
+}
+
 /*
  * Hooks and struct for unsupported pci providers
  */
@@ -286,7 +293,7 @@ void sn_pci_fixup_slot(struct pci_dev *dev)
 	list_add_tail(&pcidev_info->pdi_list,
 		      &(SN_PLATFORM_DATA(dev->bus)->pcidev_info));
 
-	if (SN_ACPI_BASE_SUPPORT())
+	if (sn_acpi_base_support())
 		sn_acpi_slot_fixup(dev, pcidev_info);
 	else
 		sn_more_slot_fixup(dev, pcidev_info);
@@ -498,7 +505,7 @@ void __devinit
 sn_pci_fixup_bus(struct pci_bus *bus)
 {
 
-	if (SN_ACPI_BASE_SUPPORT())
+	if (sn_acpi_base_support())
 		sn_acpi_bus_fixup(bus);
 	else
 		sn_bus_fixup(bus);
@@ -546,7 +553,7 @@ sn_io_early_init(void)
 
 	printk(KERN_INFO "ACPI  DSDT OEM Rev 0x%x\n",
 	       acpi_gbl_DSDT->oem_revision);
-	if (SN_ACPI_BASE_SUPPORT())
+	if (sn_acpi_base_support())
 		sn_io_acpi_init();
 	else
 		sn_io_init();
diff --git a/arch/ia64/sn/kernel/iomv.c b/arch/ia64/sn/kernel/iomv.c
index 4aa4f301d56..b1a47da118b 100644
--- a/arch/ia64/sn/kernel/iomv.c
+++ b/arch/ia64/sn/kernel/iomv.c
@@ -1,4 +1,4 @@
-/* 
+/*
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
@@ -16,7 +16,6 @@
 #include <asm/sn/pda.h>
 #include <asm/sn/sn_cpuid.h>
 #include <asm/sn/shub_mmr.h>
-#include <asm/sn/acpi.h>
 
 #define IS_LEGACY_VGA_IOPORT(p) \
 	(((p) >= 0x3b0 && (p) <= 0x3bb) || ((p) >= 0x3c0 && (p) <= 0x3df))
@@ -26,9 +25,12 @@
  * @port: port to convert
  *
  * Legacy in/out instructions are converted to ld/st instructions
- * on IA64.  This routine will convert a port number into a valid 
+ * on IA64.  This routine will convert a port number into a valid
  * SN i/o address.  Used by sn_in*() and sn_out*().
  */
+
+extern int sn_acpi_base_support();
+
 void *sn_io_addr(unsigned long port)
 {
 	if (!IS_RUNNING_ON_SIMULATOR()) {
@@ -37,7 +39,7 @@ void *sn_io_addr(unsigned long port)
 		/* On sn2, legacy I/O ports don't point at anything */
 		if (port < (64 * 1024))
 			return NULL;
-		if (SN_ACPI_BASE_SUPPORT())
+		if (sn_acpi_base_support())
 			return (__ia64_mk_io_addr(port));
 		else
 			return ((void *)(port | __IA64_UNCACHED_OFFSET));