diff --git a/target/linux/ifxmips/files/arch/mips/ifxmips/board.c b/target/linux/ifxmips/files/arch/mips/ifxmips/board.c
index 28f2e263c1..8d12ebdaf1 100644
--- a/target/linux/ifxmips/files/arch/mips/ifxmips/board.c
+++ b/target/linux/ifxmips/files/arch/mips/ifxmips/board.c
@@ -43,6 +43,9 @@
 static unsigned int chiprev;
 static struct platform_device *ifxmips_devs[MAX_IFXMIPS_DEVS];
 
+spinlock_t ebu_lock = SPIN_LOCK_UNLOCKED;
+EXPORT_SYMBOL_GPL(ebu_lock);
+
 static struct platform_device
 ifxmips_led[] =
 {
@@ -79,24 +82,6 @@ ifxmips_wdt[] =
 	},
 };
 
-static struct platform_device
-ifxmips_asc0[] =
-{
-	{
-		.id = 0,
-		.name = "ifxmips_asc",
-	},
-};
-
-static struct platform_device
-ifxmips_asc1[] =
-{
-	{
-		.id = 1,
-		.name = "ifxmips_asc",
-	},
-};
-
 static struct physmap_flash_data
 ifxmips_mtd_data = {
 	.width    = 2,
@@ -173,8 +158,6 @@ ifxmips_init_devices(void)
 	ifxmips_devs[dev++] = ifxmips_mii;
 	ifxmips_devs[dev++] = ifxmips_mtd;
 	ifxmips_devs[dev++] = ifxmips_wdt;
-	//ifxmips_devs[dev++] = ifxmips_asc0;
-	ifxmips_devs[dev++] = ifxmips_asc1;
 #ifdef CONFIG_GPIO_DEVICE
 	ifxmips_devs[dev++] = ifxmips_gpio_dev;
 #endif
diff --git a/target/linux/ifxmips/files/arch/mips/pci/ops-ifxmips.c b/target/linux/ifxmips/files/arch/mips/pci/ops-ifxmips.c
index 3eb25821dd..e04c246eae 100644
--- a/target/linux/ifxmips/files/arch/mips/pci/ops-ifxmips.c
+++ b/target/linux/ifxmips/files/arch/mips/pci/ops-ifxmips.c
@@ -8,6 +8,7 @@
 #include <asm/ifxmips/ifxmips_irq.h>
 #include <asm/addrspace.h>
 #include <linux/vmalloc.h>
+#include <asm/ifxmips/ifxmips_ebu.h>
 
 #define IFXMIPS_PCI_CFG_BUSNUM_SHF 16
 #define IFXMIPS_PCI_CFG_DEVNUM_SHF 11
@@ -33,7 +34,7 @@ ifxmips_pci_config_access(unsigned char access_type,
 			|| ((devfn & 0xf8) == 0) || ((devfn & 0xf8) == 0x68))
 		return 1;
 
-	local_irq_save(flags);
+	spin_lock_irqsave(&ebu_lock, flags);
 
 	cfg_base = ifxmips_pci_mapped_cfg;
 	cfg_base |= (bus->number << IFXMIPS_PCI_CFG_BUSNUM_SHF) | (devfn <<
@@ -64,7 +65,7 @@ ifxmips_pci_config_access(unsigned char access_type,
 	cfg_base = (ifxmips_pci_mapped_cfg | (0x68 << IFXMIPS_PCI_CFG_FUNNUM_SHF)) + 4;
 	ifxmips_w32(temp, ((u32*)cfg_base));
 
-	local_irq_restore(flags);
+	spin_unlock_irqrestore(&ebu_lock, flags);
 
 	if (((*data) == 0xffffffff) && (access_type == PCI_ACCESS_READ))
 		return 1;
diff --git a/target/linux/ifxmips/files/drivers/mtd/maps/ifxmips.c b/target/linux/ifxmips/files/drivers/mtd/maps/ifxmips.c
index b38c6269bd..808904a561 100644
--- a/target/linux/ifxmips/files/drivers/mtd/maps/ifxmips.c
+++ b/target/linux/ifxmips/files/drivers/mtd/maps/ifxmips.c
@@ -27,6 +27,7 @@
 #include <linux/mtd/partitions.h>
 #include <linux/mtd/cfi.h>
 #include <asm/ifxmips/ifxmips.h>
+#include <asm/ifxmips/ifxmips_ebu.h>
 #include <linux/magic.h>
 #include <linux/platform_device.h>
 
@@ -41,19 +42,23 @@ ifxmips_map = {
 static map_word
 ifxmips_read16(struct map_info * map, unsigned long adr)
 {
+	unsigned long flags;
 	map_word temp;
-
+	spin_lock_irqsave(&ebu_lock, flags);
 	adr ^= 2;
 	temp.x[0] = *((__u16 *) (map->virt + adr));
-
+	spin_unlock_irqrestore(&ebu_lock, flags);
 	return temp;
 }
 
 static void
 ifxmips_write16(struct map_info *map, map_word d, unsigned long adr)
 {
+	unsigned long flags;
+	spin_lock_irqsave(&ebu_lock, flags);
 	adr ^= 2;
 	*((__u16 *) (map->virt + adr)) = d.x[0];
+	spin_unlock_irqrestore(&ebu_lock, flags);
 }
 
 void
@@ -61,12 +66,14 @@ ifxmips_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t le
 {
 	unsigned char *p;
 	unsigned char *to_8;
-
+	unsigned long flags;
+	spin_lock_irqsave(&ebu_lock, flags);
 	from = (unsigned long)(from + map->virt);
 	p = (unsigned char*) from;
 	to_8 = (unsigned char*) to;
 	while(len--)
 		*to_8++ = *p++;
+		spin_unlock_irqrestore(&ebu_lock, flags);
 }
 
 void
@@ -74,12 +81,14 @@ ifxmips_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_
 {
 	unsigned char *p =  (unsigned char*)from;
 	unsigned char *to_8;
-
+	unsigned long flags;
+	spin_lock_irqsave(&ebu_lock, flags);
 	to += (unsigned long) map->virt;
 	to_8 = (unsigned char*)to;
 	while(len--){
 		*p++ = *to_8++;
 	}
+	spin_unlock_irqrestore(&ebu_lock, flags);
 }
 
 static struct mtd_partition
diff --git a/target/linux/ifxmips/files/include/asm-mips/ifxmips/ifxmips_ebu.h b/target/linux/ifxmips/files/include/asm-mips/ifxmips/ifxmips_ebu.h
new file mode 100644
index 0000000000..f9278ed15f
--- /dev/null
+++ b/target/linux/ifxmips/files/include/asm-mips/ifxmips/ifxmips_ebu.h
@@ -0,0 +1,23 @@
+/*
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+ *
+ *   Copyright (C) 2007 John Crispin <blogic@openwrt.org> 
+ */
+#ifndef _IFXMIPS_EBU_H__
+#define _IFXMIPS_EBU_H__
+
+extern spinlock_t ebu_lock;
+
+#endif