diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index e59b638766ef5f02ac3bc6b454699d68c7d0d7af..f3b3b23c5330566bee587ce93e8cd5a267b25241 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -52,6 +52,7 @@
 #include <linux/pci.h>
 #include <linux/ioport.h>
 #include <linux/notifier.h>
+#include <linux/mutex.h>
 #include <linux/kthread.h>
 #include <asm/irq.h>
 #ifdef CONFIG_HIGH_RES_TIMERS
@@ -109,6 +110,7 @@ enum si_intf_state {
 enum si_type {
     SI_KCS, SI_SMIC, SI_BT
 };
+static char *si_to_str[] = { "KCS", "SMIC", "BT" };
 
 struct ipmi_device_id {
 	unsigned char device_id;
@@ -147,6 +149,9 @@ struct smi_info
 	int (*irq_setup)(struct smi_info *info);
 	void (*irq_cleanup)(struct smi_info *info);
 	unsigned int io_size;
+	char *addr_source; /* ACPI, PCI, SMBIOS, hardcode, default. */
+	void (*addr_source_cleanup)(struct smi_info *info);
+	void *addr_source_data;
 
 	/* Per-OEM handler, called from handle_flags().
 	   Returns 1 when handle_flags() needs to be re-run
@@ -224,8 +229,12 @@ struct smi_info
 	unsigned long incoming_messages;
 
         struct task_struct *thread;
+
+	struct list_head link;
 };
 
+static int try_smi_init(struct smi_info *smi);
+
 static struct notifier_block *xaction_notifier_list;
 static int register_xaction_notifier(struct notifier_block * nb)
 {
@@ -271,13 +280,13 @@ static enum si_sm_result start_next_msg(struct smi_info *smi_info)
 	spin_lock(&(smi_info->msg_lock));
 
 	/* Pick the high priority queue first. */
-	if (! list_empty(&(smi_info->hp_xmit_msgs))) {
+	if (!list_empty(&(smi_info->hp_xmit_msgs))) {
 		entry = smi_info->hp_xmit_msgs.next;
-	} else if (! list_empty(&(smi_info->xmit_msgs))) {
+	} else if (!list_empty(&(smi_info->xmit_msgs))) {
 		entry = smi_info->xmit_msgs.next;
 	}
 
-	if (! entry) {
+	if (!entry) {
 		smi_info->curr_msg = NULL;
 		rv = SI_SM_IDLE;
 	} else {
@@ -344,7 +353,7 @@ static void start_clear_flags(struct smi_info *smi_info)
    memory, we will re-enable the interrupt. */
 static inline void disable_si_irq(struct smi_info *smi_info)
 {
-	if ((smi_info->irq) && (! smi_info->interrupt_disabled)) {
+	if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
 		disable_irq_nosync(smi_info->irq);
 		smi_info->interrupt_disabled = 1;
 	}
@@ -375,7 +384,7 @@ static void handle_flags(struct smi_info *smi_info)
 	} else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) {
 		/* Messages available. */
 		smi_info->curr_msg = ipmi_alloc_smi_msg();
-		if (! smi_info->curr_msg) {
+		if (!smi_info->curr_msg) {
 			disable_si_irq(smi_info);
 			smi_info->si_state = SI_NORMAL;
 			return;
@@ -394,7 +403,7 @@ static void handle_flags(struct smi_info *smi_info)
 	} else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) {
 		/* Events available. */
 		smi_info->curr_msg = ipmi_alloc_smi_msg();
-		if (! smi_info->curr_msg) {
+		if (!smi_info->curr_msg) {
 			disable_si_irq(smi_info);
 			smi_info->si_state = SI_NORMAL;
 			return;
@@ -430,7 +439,7 @@ static void handle_transaction_done(struct smi_info *smi_info)
 #endif
 	switch (smi_info->si_state) {
 	case SI_NORMAL:
-		if (! smi_info->curr_msg)
+		if (!smi_info->curr_msg)
 			break;
 
 		smi_info->curr_msg->rsp_size
@@ -880,7 +889,7 @@ static void smi_timeout(unsigned long data)
 
 	smi_info->last_timeout_jiffies = jiffies_now;
 
-	if ((smi_info->irq) && (! smi_info->interrupt_disabled)) {
+	if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
 		/* Running with interrupts, only do long timeouts. */
 		smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES;
 		spin_lock_irqsave(&smi_info->count_lock, flags);
@@ -974,15 +983,12 @@ static struct ipmi_smi_handlers handlers =
    a default IO port, and 1 ACPI/SPMI address.  That sets SI_MAX_DRIVERS */
 
 #define SI_MAX_PARMS 4
-#define SI_MAX_DRIVERS ((SI_MAX_PARMS * 2) + 2)
-static struct smi_info *smi_infos[SI_MAX_DRIVERS] =
-{ NULL, NULL, NULL, NULL };
+static LIST_HEAD(smi_infos);
+static DECLARE_MUTEX(smi_infos_lock);
+static int smi_num; /* Used to sequence the SMIs */
 
 #define DEVICE_NAME "ipmi_si"
 
-#define DEFAULT_KCS_IO_PORT	0xca2
-#define DEFAULT_SMIC_IO_PORT	0xca9
-#define DEFAULT_BT_IO_PORT	0xe4
 #define DEFAULT_REGSPACING	1
 
 static int           si_trydefaults = 1;
@@ -1053,38 +1059,23 @@ MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for"
 		 " by interface number.");
 
 
+#define IPMI_IO_ADDR_SPACE  0
 #define IPMI_MEM_ADDR_SPACE 1
-#define IPMI_IO_ADDR_SPACE  2
+static char *addr_space_to_str[] = { "I/O", "memory" };
 
-#if defined(CONFIG_ACPI) || defined(CONFIG_DMI) || defined(CONFIG_PCI)
-static int is_new_interface(int intf, u8 addr_space, unsigned long base_addr)
+static void std_irq_cleanup(struct smi_info *info)
 {
-	int i;
-
-	for (i = 0; i < SI_MAX_PARMS; ++i) {
-		/* Don't check our address. */
-		if (i == intf)
-			continue;
-		if (si_type[i] != NULL) {
-			if ((addr_space == IPMI_MEM_ADDR_SPACE &&
-			     base_addr == addrs[i]) ||
-			    (addr_space == IPMI_IO_ADDR_SPACE &&
-			     base_addr == ports[i]))
-				return 0;
-		}
-		else
-			break;
-	}
-
-	return 1;
+	if (info->si_type == SI_BT)
+		/* Disable the interrupt in the BT interface. */
+		info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0);
+	free_irq(info->irq, info);
 }
-#endif
 
 static int std_irq_setup(struct smi_info *info)
 {
 	int rv;
 
-	if (! info->irq)
+	if (!info->irq)
 		return 0;
 
 	if (info->si_type == SI_BT) {
@@ -1093,7 +1084,7 @@ static int std_irq_setup(struct smi_info *info)
 				 SA_INTERRUPT,
 				 DEVICE_NAME,
 				 info);
-		if (! rv)
+		if (!rv)
 			/* Enable the interrupt in the BT interface. */
 			info->io.outputb(&info->io, IPMI_BT_INTMASK_REG,
 					 IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
@@ -1110,88 +1101,78 @@ static int std_irq_setup(struct smi_info *info)
 		       DEVICE_NAME, info->irq);
 		info->irq = 0;
 	} else {
+		info->irq_cleanup = std_irq_cleanup;
 		printk("  Using irq %d\n", info->irq);
 	}
 
 	return rv;
 }
 
-static void std_irq_cleanup(struct smi_info *info)
-{
-	if (! info->irq)
-		return;
-
-	if (info->si_type == SI_BT)
-		/* Disable the interrupt in the BT interface. */
-		info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0);
-	free_irq(info->irq, info);
-}
-
 static unsigned char port_inb(struct si_sm_io *io, unsigned int offset)
 {
-	unsigned int *addr = io->info;
+	unsigned int addr = io->addr_data;
 
-	return inb((*addr)+(offset*io->regspacing));
+	return inb(addr + (offset * io->regspacing));
 }
 
 static void port_outb(struct si_sm_io *io, unsigned int offset,
 		      unsigned char b)
 {
-	unsigned int *addr = io->info;
+	unsigned int addr = io->addr_data;
 
-	outb(b, (*addr)+(offset * io->regspacing));
+	outb(b, addr + (offset * io->regspacing));
 }
 
 static unsigned char port_inw(struct si_sm_io *io, unsigned int offset)
 {
-	unsigned int *addr = io->info;
+	unsigned int addr = io->addr_data;
 
-	return (inw((*addr)+(offset * io->regspacing)) >> io->regshift) & 0xff;
+	return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
 }
 
 static void port_outw(struct si_sm_io *io, unsigned int offset,
 		      unsigned char b)
 {
-	unsigned int *addr = io->info;
+	unsigned int addr = io->addr_data;
 
-	outw(b << io->regshift, (*addr)+(offset * io->regspacing));
+	outw(b << io->regshift, addr + (offset * io->regspacing));
 }
 
 static unsigned char port_inl(struct si_sm_io *io, unsigned int offset)
 {
-	unsigned int *addr = io->info;
+	unsigned int addr = io->addr_data;
 
-	return (inl((*addr)+(offset * io->regspacing)) >> io->regshift) & 0xff;
+	return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
 }
 
 static void port_outl(struct si_sm_io *io, unsigned int offset,
 		      unsigned char b)
 {
-	unsigned int *addr = io->info;
+	unsigned int addr = io->addr_data;
 
-	outl(b << io->regshift, (*addr)+(offset * io->regspacing));
+	outl(b << io->regshift, addr+(offset * io->regspacing));
 }
 
 static void port_cleanup(struct smi_info *info)
 {
-	unsigned int *addr = info->io.info;
-	int           mapsize;
+	unsigned int addr = info->io.addr_data;
+	int          mapsize;
 
-	if (addr && (*addr)) {
+	if (addr) {
 		mapsize = ((info->io_size * info->io.regspacing)
 			   - (info->io.regspacing - info->io.regsize));
 
-		release_region (*addr, mapsize);
+		release_region (addr, mapsize);
 	}
 	kfree(info);
 }
 
 static int port_setup(struct smi_info *info)
 {
-	unsigned int *addr = info->io.info;
-	int           mapsize;
+	unsigned int addr = info->io.addr_data;
+	int          mapsize;
 
-	if (! addr || (! *addr))
+	if (!addr)
 		return -ENODEV;
 
 	info->io_cleanup = port_cleanup;
@@ -1225,51 +1206,11 @@ static int port_setup(struct smi_info *info)
 	mapsize = ((info->io_size * info->io.regspacing)
 		   - (info->io.regspacing - info->io.regsize));
 
-	if (request_region(*addr, mapsize, DEVICE_NAME) == NULL)
+	if (request_region(addr, mapsize, DEVICE_NAME) == NULL)
 		return -EIO;
 	return 0;
 }
 
-static int try_init_port(int intf_num, struct smi_info **new_info)
-{
-	struct smi_info *info;
-
-	if (! ports[intf_num])
-		return -ENODEV;
-
-	if (! is_new_interface(intf_num, IPMI_IO_ADDR_SPACE,
-			      ports[intf_num]))
-		return -ENODEV;
-
-	info = kmalloc(sizeof(*info), GFP_KERNEL);
-	if (! info) {
-		printk(KERN_ERR "ipmi_si: Could not allocate SI data (1)\n");
-		return -ENOMEM;
-	}
-	memset(info, 0, sizeof(*info));
-
-	info->io_setup = port_setup;
-	info->io.info = &(ports[intf_num]);
-	info->io.addr = NULL;
-	info->io.regspacing = regspacings[intf_num];
-	if (! info->io.regspacing)
-		info->io.regspacing = DEFAULT_REGSPACING;
-	info->io.regsize = regsizes[intf_num];
-	if (! info->io.regsize)
-		info->io.regsize = DEFAULT_REGSPACING;
-	info->io.regshift = regshifts[intf_num];
-	info->irq = 0;
-	info->irq_setup = NULL;
-	*new_info = info;
-
-	if (si_type[intf_num] == NULL)
-		si_type[intf_num] = "kcs";
-
-	printk("ipmi_si: Trying \"%s\" at I/O port 0x%x\n",
-	       si_type[intf_num], ports[intf_num]);
-	return 0;
-}
-
 static unsigned char intf_mem_inb(struct si_sm_io *io, unsigned int offset)
 {
 	return readb((io->addr)+(offset * io->regspacing));
@@ -1321,7 +1262,7 @@ static void mem_outq(struct si_sm_io *io, unsigned int offset,
 
 static void mem_cleanup(struct smi_info *info)
 {
-	unsigned long *addr = info->io.info;
+	unsigned long addr = info->io.addr_data;
 	int           mapsize;
 
 	if (info->io.addr) {
@@ -1330,17 +1271,17 @@ static void mem_cleanup(struct smi_info *info)
 		mapsize = ((info->io_size * info->io.regspacing)
 			   - (info->io.regspacing - info->io.regsize));
 
-		release_mem_region(*addr, mapsize);
+		release_mem_region(addr, mapsize);
 	}
 	kfree(info);
 }
 
 static int mem_setup(struct smi_info *info)
 {
-	unsigned long *addr = info->io.info;
+	unsigned long addr = info->io.addr_data;
 	int           mapsize;
 
-	if (! addr || (! *addr))
+	if (!addr)
 		return -ENODEV;
 
 	info->io_cleanup = mem_cleanup;
@@ -1380,57 +1321,83 @@ static int mem_setup(struct smi_info *info)
 	mapsize = ((info->io_size * info->io.regspacing)
 		   - (info->io.regspacing - info->io.regsize));
 
-	if (request_mem_region(*addr, mapsize, DEVICE_NAME) == NULL)
+	if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL)
 		return -EIO;
 
-	info->io.addr = ioremap(*addr, mapsize);
+	info->io.addr = ioremap(addr, mapsize);
 	if (info->io.addr == NULL) {
-		release_mem_region(*addr, mapsize);
+		release_mem_region(addr, mapsize);
 		return -EIO;
 	}
 	return 0;
 }
 
-static int try_init_mem(int intf_num, struct smi_info **new_info)
+
+static __devinit void hardcode_find_bmc(void)
 {
+	int             i;
 	struct smi_info *info;
 
-	if (! addrs[intf_num])
-		return -ENODEV;
+	for (i = 0; i < SI_MAX_PARMS; i++) {
+		if (!ports[i] && !addrs[i])
+			continue;
 
-	if (! is_new_interface(intf_num, IPMI_MEM_ADDR_SPACE,
-			      addrs[intf_num]))
-		return -ENODEV;
+		info = kzalloc(sizeof(*info), GFP_KERNEL);
+		if (!info)
+			return;
 
-	info = kmalloc(sizeof(*info), GFP_KERNEL);
-	if (! info) {
-		printk(KERN_ERR "ipmi_si: Could not allocate SI data (2)\n");
-		return -ENOMEM;
-	}
-	memset(info, 0, sizeof(*info));
+		info->addr_source = "hardcoded";
 
-	info->io_setup = mem_setup;
-	info->io.info = &addrs[intf_num];
-	info->io.addr = NULL;
-	info->io.regspacing = regspacings[intf_num];
-	if (! info->io.regspacing)
-		info->io.regspacing = DEFAULT_REGSPACING;
-	info->io.regsize = regsizes[intf_num];
-	if (! info->io.regsize)
-		info->io.regsize = DEFAULT_REGSPACING;
-	info->io.regshift = regshifts[intf_num];
-	info->irq = 0;
-	info->irq_setup = NULL;
-	*new_info = info;
+		if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) {
+			info->si_type = SI_KCS;
+		} else if (strcmp(si_type[i], "smic") == 0) {
+			info->si_type = SI_SMIC;
+		} else if (strcmp(si_type[i], "bt") == 0) {
+			info->si_type = SI_BT;
+		} else {
+			printk(KERN_WARNING
+			       "ipmi_si: Interface type specified "
+			       "for interface %d, was invalid: %s\n",
+			       i, si_type[i]);
+			kfree(info);
+			continue;
+		}
 
-	if (si_type[intf_num] == NULL)
-		si_type[intf_num] = "kcs";
+		if (ports[i]) {
+			/* An I/O port */
+			info->io_setup = port_setup;
+			info->io.addr_data = ports[i];
+			info->io.addr_type = IPMI_IO_ADDR_SPACE;
+		} else if (addrs[i]) {
+			/* A memory port */
+			info->io_setup = mem_setup;
+			info->io.addr_data = addrs[i];
+			info->io.addr_type = IPMI_MEM_ADDR_SPACE;
+		} else {
+			printk(KERN_WARNING
+			       "ipmi_si: Interface type specified "
+			       "for interface %d, "
+			       "but port and address were not set or "
+			       "set to zero.\n", i);
+			kfree(info);
+			continue;
+		}
 
-	printk("ipmi_si: Trying \"%s\" at memory address 0x%lx\n",
-	       si_type[intf_num], addrs[intf_num]);
-	return 0;
-}
+		info->io.addr = NULL;
+		info->io.regspacing = regspacings[i];
+		if (!info->io.regspacing)
+			info->io.regspacing = DEFAULT_REGSPACING;
+		info->io.regsize = regsizes[i];
+		if (!info->io.regsize)
+			info->io.regsize = DEFAULT_REGSPACING;
+		info->io.regshift = regshifts[i];
+		info->irq = irqs[i];
+		if (info->irq)
+			info->irq_setup = std_irq_setup;
 
+		try_smi_init(info);
+	}
+}
 
 #ifdef CONFIG_ACPI
 
@@ -1470,11 +1437,19 @@ static u32 ipmi_acpi_gpe(void *context)
 	return ACPI_INTERRUPT_HANDLED;
 }
 
+static void acpi_gpe_irq_cleanup(struct smi_info *info)
+{
+	if (!info->irq)
+		return;
+
+	acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe);
+}
+
 static int acpi_gpe_irq_setup(struct smi_info *info)
 {
 	acpi_status status;
 
-	if (! info->irq)
+	if (!info->irq)
 		return 0;
 
 	/* FIXME - is level triggered right? */
@@ -1491,19 +1466,12 @@ static int acpi_gpe_irq_setup(struct smi_info *info)
 		info->irq = 0;
 		return -EINVAL;
 	} else {
+		info->irq_cleanup = acpi_gpe_irq_cleanup;
 		printk("  Using ACPI GPE %d\n", info->irq);
 		return 0;
 	}
 }
 
-static void acpi_gpe_irq_cleanup(struct smi_info *info)
-{
-	if (! info->irq)
-		return;
-
-	acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe);
-}
-
 /*
  * Defined at
  * http://h21007.www2.hp.com/dspp/files/unprotected/devresource/Docs/TechPapers/IA64/hpspmi.pdf
@@ -1546,28 +1514,12 @@ struct SPMITable {
 	s8      spmi_id[1]; /* A '\0' terminated array starts here. */
 };
 
-static int try_init_acpi(int intf_num, struct smi_info **new_info)
+static __devinit int try_init_acpi(struct SPMITable *spmi)
 {
 	struct smi_info  *info;
-	acpi_status      status;
-	struct SPMITable *spmi;
 	char             *io_type;
 	u8 		 addr_space;
 
-	if (acpi_disabled)
-		return -ENODEV;
-
-	if (acpi_failure)
-		return -ENODEV;
-
-	status = acpi_get_firmware_table("SPMI", intf_num+1,
-					 ACPI_LOGICAL_ADDRESSING,
-					 (struct acpi_table_header **) &spmi);
-	if (status != AE_OK) {
-		acpi_failure = 1;
-		return -ENODEV;
-	}
-
 	if (spmi->IPMIlegacy != 1) {
 	    printk(KERN_INFO "IPMI: Bad SPMI legacy %d\n", spmi->IPMIlegacy);
   	    return -ENODEV;
@@ -1577,47 +1529,42 @@ static int try_init_acpi(int intf_num, struct smi_info **new_info)
 		addr_space = IPMI_MEM_ADDR_SPACE;
 	else
 		addr_space = IPMI_IO_ADDR_SPACE;
-	if (! is_new_interface(-1, addr_space, spmi->addr.address))
-		return -ENODEV;
+
+	info = kzalloc(sizeof(*info), GFP_KERNEL);
+	if (!info) {
+		printk(KERN_ERR "ipmi_si: Could not allocate SI data (3)\n");
+		return -ENOMEM;
+	}
+
+	info->addr_source = "ACPI";
 
 	/* Figure out the interface type. */
 	switch (spmi->InterfaceType)
 	{
 	case 1:	/* KCS */
-		si_type[intf_num] = "kcs";
+		info->si_type = SI_KCS;
 		break;
-
 	case 2:	/* SMIC */
-		si_type[intf_num] = "smic";
+		info->si_type = SI_SMIC;
 		break;
-
 	case 3:	/* BT */
-		si_type[intf_num] = "bt";
+		info->si_type = SI_BT;
 		break;
-
 	default:
 		printk(KERN_INFO "ipmi_si: Unknown ACPI/SPMI SI type %d\n",
 			spmi->InterfaceType);
+		kfree(info);
 		return -EIO;
 	}
 
-	info = kmalloc(sizeof(*info), GFP_KERNEL);
-	if (! info) {
-		printk(KERN_ERR "ipmi_si: Could not allocate SI data (3)\n");
-		return -ENOMEM;
-	}
-	memset(info, 0, sizeof(*info));
-
 	if (spmi->InterruptType & 1) {
 		/* We've got a GPE interrupt. */
 		info->irq = spmi->GPE;
 		info->irq_setup = acpi_gpe_irq_setup;
-		info->irq_cleanup = acpi_gpe_irq_cleanup;
 	} else if (spmi->InterruptType & 2) {
 		/* We've got an APIC/SAPIC interrupt. */
 		info->irq = spmi->GlobalSystemInterrupt;
 		info->irq_setup = std_irq_setup;
-		info->irq_cleanup = std_irq_cleanup;
 	} else {
 		/* Use the default interrupt setting. */
 		info->irq = 0;
@@ -1626,43 +1573,60 @@ static int try_init_acpi(int intf_num, struct smi_info **new_info)
 
 	if (spmi->addr.register_bit_width) {
 		/* A (hopefully) properly formed register bit width. */
-		regspacings[intf_num] = spmi->addr.register_bit_width / 8;
 		info->io.regspacing = spmi->addr.register_bit_width / 8;
 	} else {
-		regspacings[intf_num] = DEFAULT_REGSPACING;
 		info->io.regspacing = DEFAULT_REGSPACING;
 	}
-	regsizes[intf_num] = regspacings[intf_num];
-	info->io.regsize = regsizes[intf_num];
-	regshifts[intf_num] = spmi->addr.register_bit_offset;
-	info->io.regshift = regshifts[intf_num];
+	info->io.regsize = info->io.regspacing;
+	info->io.regshift = spmi->addr.register_bit_offset;
 
 	if (spmi->addr.address_space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
 		io_type = "memory";
 		info->io_setup = mem_setup;
-		addrs[intf_num] = spmi->addr.address;
-		info->io.info = &(addrs[intf_num]);
+		info->io.addr_type = IPMI_IO_ADDR_SPACE;
 	} else if (spmi->addr.address_space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
 		io_type = "I/O";
 		info->io_setup = port_setup;
-		ports[intf_num] = spmi->addr.address;
-		info->io.info = &(ports[intf_num]);
+		info->io.addr_type = IPMI_MEM_ADDR_SPACE;
 	} else {
 		kfree(info);
 		printk("ipmi_si: Unknown ACPI I/O Address type\n");
 		return -EIO;
 	}
+	info->io.addr_data = spmi->addr.address;
 
-	*new_info = info;
+	try_smi_init(info);
 
-	printk("ipmi_si: ACPI/SPMI specifies \"%s\" %s SI @ 0x%lx\n",
-	       si_type[intf_num], io_type, (unsigned long) spmi->addr.address);
 	return 0;
 }
+
+static __devinit void acpi_find_bmc(void)
+{
+	acpi_status      status;
+	struct SPMITable *spmi;
+	int              i;
+
+	if (acpi_disabled)
+		return;
+
+	if (acpi_failure)
+		return;
+
+	for (i = 0; ; i++) {
+		status = acpi_get_firmware_table("SPMI", i+1,
+						 ACPI_LOGICAL_ADDRESSING,
+						 (struct acpi_table_header **)
+						 &spmi);
+		if (status != AE_OK)
+			return;
+
+		try_init_acpi(spmi);
+	}
+}
 #endif
 
 #ifdef CONFIG_DMI
-typedef struct dmi_ipmi_data
+struct dmi_ipmi_data
 {
 	u8   		type;
 	u8   		addr_space;
@@ -1670,49 +1634,46 @@ typedef struct dmi_ipmi_data
 	u8   		irq;
 	u8              offset;
 	u8              slave_addr;
-} dmi_ipmi_data_t;
-
-static dmi_ipmi_data_t dmi_data[SI_MAX_DRIVERS];
-static int dmi_data_entries;
+};
 
-static int __init decode_dmi(struct dmi_header *dm, int intf_num)
+static int __devinit decode_dmi(struct dmi_header *dm,
+				struct dmi_ipmi_data *dmi)
 {
 	u8              *data = (u8 *)dm;
 	unsigned long  	base_addr;
 	u8		reg_spacing;
 	u8              len = dm->length;
-	dmi_ipmi_data_t *ipmi_data = dmi_data+intf_num;
 
-	ipmi_data->type = data[4];
+	dmi->type = data[4];
 
 	memcpy(&base_addr, data+8, sizeof(unsigned long));
 	if (len >= 0x11) {
 		if (base_addr & 1) {
 			/* I/O */
 			base_addr &= 0xFFFE;
-			ipmi_data->addr_space = IPMI_IO_ADDR_SPACE;
+			dmi->addr_space = IPMI_IO_ADDR_SPACE;
 		}
 		else {
 			/* Memory */
-			ipmi_data->addr_space = IPMI_MEM_ADDR_SPACE;
+			dmi->addr_space = IPMI_MEM_ADDR_SPACE;
 		}
 		/* If bit 4 of byte 0x10 is set, then the lsb for the address
 		   is odd. */
-		ipmi_data->base_addr = base_addr | ((data[0x10] & 0x10) >> 4);
+		dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4);
 
-		ipmi_data->irq = data[0x11];
+		dmi->irq = data[0x11];
 
 		/* The top two bits of byte 0x10 hold the register spacing. */
 		reg_spacing = (data[0x10] & 0xC0) >> 6;
 		switch(reg_spacing){
 		case 0x00: /* Byte boundaries */
-		    ipmi_data->offset = 1;
+		    dmi->offset = 1;
 		    break;
 		case 0x01: /* 32-bit boundaries */
-		    ipmi_data->offset = 4;
+		    dmi->offset = 4;
 		    break;
 		case 0x02: /* 16-byte boundaries */
-		    ipmi_data->offset = 16;
+		    dmi->offset = 16;
 		    break;
 		default:
 		    /* Some other interface, just ignore it. */
@@ -1726,205 +1687,213 @@ static int __init decode_dmi(struct dmi_header *dm, int intf_num)
 		 * wrong (and all that I have seen are I/O) so we just
 		 * ignore that bit and assume I/O.  Systems that use
 		 * memory should use the newer spec, anyway. */
-		ipmi_data->base_addr = base_addr & 0xfffe;
-		ipmi_data->addr_space = IPMI_IO_ADDR_SPACE;
-		ipmi_data->offset = 1;
-	}
-
-	ipmi_data->slave_addr = data[6];
-
-	if (is_new_interface(-1, ipmi_data->addr_space,ipmi_data->base_addr)) {
-		dmi_data_entries++;
-		return 0;
+		dmi->base_addr = base_addr & 0xfffe;
+		dmi->addr_space = IPMI_IO_ADDR_SPACE;
+		dmi->offset = 1;
 	}
 
-	memset(ipmi_data, 0, sizeof(dmi_ipmi_data_t));
+	dmi->slave_addr = data[6];
 
-	return -1;
+	return 0;
 }
 
-static void __init dmi_find_bmc(void)
+static __devinit void try_init_dmi(struct dmi_ipmi_data *ipmi_data)
 {
-	struct dmi_device *dev = NULL;
-	int               intf_num = 0;
-
-	while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) {
-		if (intf_num >= SI_MAX_DRIVERS)
-			break;
+	struct smi_info *info;
 
-		decode_dmi((struct dmi_header *) dev->device_data, intf_num++);
+	info = kzalloc(sizeof(*info), GFP_KERNEL);
+	if (!info) {
+		printk(KERN_ERR
+		       "ipmi_si: Could not allocate SI data\n");
+		return;
 	}
-}
-
-static int try_init_smbios(int intf_num, struct smi_info **new_info)
-{
-	struct smi_info *info;
-	dmi_ipmi_data_t *ipmi_data = dmi_data+intf_num;
-	char            *io_type;
 
-	if (intf_num >= dmi_data_entries)
-		return -ENODEV;
+	info->addr_source = "SMBIOS";
 
 	switch (ipmi_data->type) {
-		case 0x01: /* KCS */
-			si_type[intf_num] = "kcs";
-			break;
-		case 0x02: /* SMIC */
-			si_type[intf_num] = "smic";
-			break;
-		case 0x03: /* BT */
-			si_type[intf_num] = "bt";
-			break;
-		default:
-			return -EIO;
-	}
-
-	info = kmalloc(sizeof(*info), GFP_KERNEL);
-	if (! info) {
-		printk(KERN_ERR "ipmi_si: Could not allocate SI data (4)\n");
-		return -ENOMEM;
+	case 0x01: /* KCS */
+		info->si_type = SI_KCS;
+		break;
+	case 0x02: /* SMIC */
+		info->si_type = SI_SMIC;
+		break;
+	case 0x03: /* BT */
+		info->si_type = SI_BT;
+		break;
+	default:
+		return;
 	}
-	memset(info, 0, sizeof(*info));
 
-	if (ipmi_data->addr_space == 1) {
-		io_type = "memory";
+	switch (ipmi_data->addr_space) {
+	case IPMI_MEM_ADDR_SPACE:
 		info->io_setup = mem_setup;
-		addrs[intf_num] = ipmi_data->base_addr;
-		info->io.info = &(addrs[intf_num]);
-	} else if (ipmi_data->addr_space == 2) {
-		io_type = "I/O";
+		info->io.addr_type = IPMI_MEM_ADDR_SPACE;
+		break;
+
+	case IPMI_IO_ADDR_SPACE:
 		info->io_setup = port_setup;
-		ports[intf_num] = ipmi_data->base_addr;
-		info->io.info = &(ports[intf_num]);
-	} else {
+		info->io.addr_type = IPMI_IO_ADDR_SPACE;
+		break;
+
+	default:
 		kfree(info);
-		printk("ipmi_si: Unknown SMBIOS I/O Address type.\n");
-		return -EIO;
+		printk(KERN_WARNING
+		       "ipmi_si: Unknown SMBIOS I/O Address type: %d.\n",
+		       ipmi_data->addr_space);
+		return;
 	}
+	info->io.addr_data = ipmi_data->base_addr;
 
-	regspacings[intf_num] = ipmi_data->offset;
-	info->io.regspacing = regspacings[intf_num];
-	if (! info->io.regspacing)
+	info->io.regspacing = ipmi_data->offset;
+	if (!info->io.regspacing)
 		info->io.regspacing = DEFAULT_REGSPACING;
 	info->io.regsize = DEFAULT_REGSPACING;
-	info->io.regshift = regshifts[intf_num];
+	info->io.regshift = 0;
 
 	info->slave_addr = ipmi_data->slave_addr;
 
-	irqs[intf_num] = ipmi_data->irq;
+	info->irq = ipmi_data->irq;
+	if (info->irq)
+		info->irq_setup = std_irq_setup;
 
-	*new_info = info;
+	try_smi_init(info);
+}
 
-	printk("ipmi_si: Found SMBIOS-specified state machine at %s"
-	       " address 0x%lx, slave address 0x%x\n",
-	       io_type, (unsigned long)ipmi_data->base_addr,
-	       ipmi_data->slave_addr);
-	return 0;
+static void __devinit dmi_find_bmc(void)
+{
+	struct dmi_device    *dev = NULL;
+	struct dmi_ipmi_data data;
+	int                  rv;
+
+	while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) {
+		rv = decode_dmi((struct dmi_header *) dev->device_data, &data);
+		if (!rv)
+			try_init_dmi(&data);
+	}
 }
 #endif /* CONFIG_DMI */
 
 #ifdef CONFIG_PCI
 
-#define PCI_ERMC_CLASSCODE  0x0C0700
+#define PCI_ERMC_CLASSCODE		0x0C0700
+#define PCI_ERMC_CLASSCODE_MASK		0xffffff00
+#define PCI_ERMC_CLASSCODE_TYPE_MASK	0xff
+#define PCI_ERMC_CLASSCODE_TYPE_SMIC	0x00
+#define PCI_ERMC_CLASSCODE_TYPE_KCS	0x01
+#define PCI_ERMC_CLASSCODE_TYPE_BT	0x02
+
 #define PCI_HP_VENDOR_ID    0x103C
 #define PCI_MMC_DEVICE_ID   0x121A
 #define PCI_MMC_ADDR_CW     0x10
 
-/* Avoid more than one attempt to probe pci smic. */
-static int pci_smic_checked = 0;
+static void ipmi_pci_cleanup(struct smi_info *info)
+{
+	struct pci_dev *pdev = info->addr_source_data;
+
+	pci_disable_device(pdev);
+}
 
-static int find_pci_smic(int intf_num, struct smi_info **new_info)
+static int __devinit ipmi_pci_probe(struct pci_dev *pdev,
+				    const struct pci_device_id *ent)
 {
-	struct smi_info  *info;
-	int              error;
-	struct pci_dev   *pci_dev = NULL;
-	u16    		 base_addr;
-	int              fe_rmc = 0;
+	int rv;
+	int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK;
+	struct smi_info *info;
+	int first_reg_offset = 0;
 
-	if (pci_smic_checked)
-		return -ENODEV;
+	info = kzalloc(sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return ENOMEM;
 
-	pci_smic_checked = 1;
+	info->addr_source = "PCI";
 
-	pci_dev = pci_get_device(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID, NULL);
-	if (! pci_dev) {
-		pci_dev = pci_get_class(PCI_ERMC_CLASSCODE, NULL);
-		if (pci_dev && (pci_dev->subsystem_vendor == PCI_HP_VENDOR_ID))
-			fe_rmc = 1;
-		else
-			return -ENODEV;
-	}
+	switch (class_type) {
+	case PCI_ERMC_CLASSCODE_TYPE_SMIC:
+		info->si_type = SI_SMIC;
+		break;
 
-	error = pci_read_config_word(pci_dev, PCI_MMC_ADDR_CW, &base_addr);
-	if (error)
-	{
-		pci_dev_put(pci_dev);
-		printk(KERN_ERR
-		       "ipmi_si: pci_read_config_word() failed (%d).\n",
-		       error);
-		return -ENODEV;
+	case PCI_ERMC_CLASSCODE_TYPE_KCS:
+		info->si_type = SI_KCS;
+		break;
+
+	case PCI_ERMC_CLASSCODE_TYPE_BT:
+		info->si_type = SI_BT;
+		break;
+
+	default:
+		kfree(info);
+		printk(KERN_INFO "ipmi_si: %s: Unknown IPMI type: %d\n",
+		       pci_name(pdev), class_type);
+		return ENOMEM;
 	}
 
-	/* Bit 0: 1 specifies programmed I/O, 0 specifies memory mapped I/O */
-	if (! (base_addr & 0x0001))
-	{
-		pci_dev_put(pci_dev);
-		printk(KERN_ERR
-		       "ipmi_si: memory mapped I/O not supported for PCI"
-		       " smic.\n");
-		return -ENODEV;
+	rv = pci_enable_device(pdev);
+	if (rv) {
+		printk(KERN_ERR "ipmi_si: %s: couldn't enable PCI device\n",
+		       pci_name(pdev));
+		kfree(info);
+		return rv;
 	}
 
-	base_addr &= 0xFFFE;
-	if (! fe_rmc)
-		/* Data register starts at base address + 1 in eRMC */
-		++base_addr;
+	info->addr_source_cleanup = ipmi_pci_cleanup;
+	info->addr_source_data = pdev;
 
-	if (! is_new_interface(-1, IPMI_IO_ADDR_SPACE, base_addr)) {
-		pci_dev_put(pci_dev);
-		return -ENODEV;
-	}
+	if (pdev->subsystem_vendor == PCI_HP_VENDOR_ID)
+		first_reg_offset = 1;
 
-	info = kmalloc(sizeof(*info), GFP_KERNEL);
-	if (! info) {
-		pci_dev_put(pci_dev);
-		printk(KERN_ERR "ipmi_si: Could not allocate SI data (5)\n");
-		return -ENOMEM;
+	if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) {
+		info->io_setup = port_setup;
+		info->io.addr_type = IPMI_IO_ADDR_SPACE;
+	} else {
+		info->io_setup = mem_setup;
+		info->io.addr_type = IPMI_MEM_ADDR_SPACE;
 	}
-	memset(info, 0, sizeof(*info));
+	info->io.addr_data = pci_resource_start(pdev, 0);
 
-	info->io_setup = port_setup;
-	ports[intf_num] = base_addr;
-	info->io.info = &(ports[intf_num]);
-	info->io.regspacing = regspacings[intf_num];
-	if (! info->io.regspacing)
-		info->io.regspacing = DEFAULT_REGSPACING;
+	info->io.regspacing = DEFAULT_REGSPACING;
 	info->io.regsize = DEFAULT_REGSPACING;
-	info->io.regshift = regshifts[intf_num];
+	info->io.regshift = 0;
 
-	*new_info = info;
+	info->irq = pdev->irq;
+	if (info->irq)
+		info->irq_setup = std_irq_setup;
 
-	irqs[intf_num] = pci_dev->irq;
-	si_type[intf_num] = "smic";
+	return try_smi_init(info);
+}
 
-	printk("ipmi_si: Found PCI SMIC at I/O address 0x%lx\n",
-		(long unsigned int) base_addr);
+static void __devexit ipmi_pci_remove(struct pci_dev *pdev)
+{
+}
 
-	pci_dev_put(pci_dev);
+#ifdef CONFIG_PM
+static int ipmi_pci_suspend(struct pci_dev *pdev, pm_message_t state)
+{
 	return 0;
 }
-#endif /* CONFIG_PCI */
 
-static int try_init_plug_and_play(int intf_num, struct smi_info **new_info)
+static int ipmi_pci_resume(struct pci_dev *pdev)
 {
-#ifdef CONFIG_PCI
-	if (find_pci_smic(intf_num, new_info) == 0)
-		return 0;
+	return 0;
+}
 #endif
-	/* Include other methods here. */
 
-	return -ENODEV;
-}
+static struct pci_device_id ipmi_pci_devices[] = {
+	{ PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) },
+	{ PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE) }
+};
+MODULE_DEVICE_TABLE(pci, ipmi_pci_devices);
+
+static struct pci_driver ipmi_pci_driver = {
+        .name =         DEVICE_NAME,
+        .id_table =     ipmi_pci_devices,
+        .probe =        ipmi_pci_probe,
+        .remove =       __devexit_p(ipmi_pci_remove),
+#ifdef CONFIG_PM
+        .suspend =      ipmi_pci_suspend,
+        .resume =       ipmi_pci_resume,
+#endif
+};
+#endif /* CONFIG_PCI */
 
 
 static int try_get_dev_id(struct smi_info *smi_info)
@@ -1936,7 +1905,7 @@ static int try_get_dev_id(struct smi_info *smi_info)
 	int               rv = 0;
 
 	resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
-	if (! resp)
+	if (!resp)
 		return -ENOMEM;
 
 	/* Do a Get Device ID command, since it comes back with some
@@ -2018,7 +1987,7 @@ static int stat_file_read_proc(char *page, char **start, off_t off,
 	struct smi_info *smi = data;
 
 	out += sprintf(out, "interrupts_enabled:    %d\n",
-		       smi->irq && ! smi->interrupt_disabled);
+		       smi->irq && !smi->interrupt_disabled);
 	out += sprintf(out, "short_timeouts:        %ld\n",
 		       smi->short_timeouts);
 	out += sprintf(out, "long_timeouts:         %ld\n",
@@ -2094,7 +2063,7 @@ static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info)
 {
 	struct ipmi_device_id *id = &smi_info->device_id;
 	const char mfr[3]=DELL_IANA_MFR_ID;
-	if (! memcmp(mfr, id->manufacturer_id, sizeof(mfr))) {
+	if (!memcmp(mfr, id->manufacturer_id, sizeof(mfr))) {
 		if (id->device_id       == DELL_POWEREDGE_8G_BMC_DEVICE_ID  &&
 		    id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV &&
 		    id->ipmi_version    == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) {
@@ -2170,7 +2139,7 @@ setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info)
 {
 	struct ipmi_device_id *id = &smi_info->device_id;
 	const char mfr[3]=DELL_IANA_MFR_ID;
- 	if (! memcmp(mfr, id->manufacturer_id, sizeof(mfr)) &&
+ 	if (!memcmp(mfr, id->manufacturer_id, sizeof(mfr)) &&
 	    smi_info->si_type == SI_BT)
 		register_xaction_notifier(&dell_poweredge_bt_xaction_notifier);
 }
@@ -2200,62 +2169,110 @@ static inline void wait_for_timer_and_thread(struct smi_info *smi_info)
 	del_timer_sync(&smi_info->si_timer);
 }
 
-/* Returns 0 if initialized, or negative on an error. */
-static int init_one_smi(int intf_num, struct smi_info **smi)
+static struct ipmi_default_vals
+{
+	int type;
+	int port;
+} __devinit ipmi_defaults[] =
+{
+	{ .type = SI_KCS, .port = 0xca2 },
+	{ .type = SI_SMIC, .port = 0xca9 },
+	{ .type = SI_BT, .port = 0xe4 },
+	{ .port = 0 }
+};
+
+static __devinit void default_find_bmc(void)
+{
+	struct smi_info *info;
+	int             i;
+
+	for (i = 0; ; i++) {
+		if (!ipmi_defaults[i].port)
+			break;
+
+		info = kzalloc(sizeof(*info), GFP_KERNEL);
+		if (!info)
+			return;
+
+		info->addr_source = NULL;
+
+		info->si_type = ipmi_defaults[i].type;
+		info->io_setup = port_setup;
+		info->io.addr_data = ipmi_defaults[i].port;
+		info->io.addr_type = IPMI_IO_ADDR_SPACE;
+
+		info->io.addr = NULL;
+		info->io.regspacing = DEFAULT_REGSPACING;
+		info->io.regsize = DEFAULT_REGSPACING;
+		info->io.regshift = 0;
+
+		if (try_smi_init(info) == 0) {
+			/* Found one... */
+			printk(KERN_INFO "ipmi_si: Found default %s state"
+			       " machine at %s address 0x%lx\n",
+			       si_to_str[info->si_type],
+			       addr_space_to_str[info->io.addr_type],
+			       info->io.addr_data);
+			return;
+		}
+	}
+}
+
+static int is_new_interface(struct smi_info *info)
 {
-	int		rv;
-	struct smi_info *new_smi;
+	struct smi_info *e;
 
+	list_for_each_entry(e, &smi_infos, link) {
+		if (e->io.addr_type != info->io.addr_type)
+			continue;
+		if (e->io.addr_data == info->io.addr_data)
+			return 0;
+	}
 
-	rv = try_init_mem(intf_num, &new_smi);
-	if (rv)
-		rv = try_init_port(intf_num, &new_smi);
-#ifdef CONFIG_ACPI
-	if (rv && si_trydefaults)
-		rv = try_init_acpi(intf_num, &new_smi);
-#endif
-#ifdef CONFIG_DMI
-	if (rv && si_trydefaults)
-		rv = try_init_smbios(intf_num, &new_smi);
-#endif
-	if (rv && si_trydefaults)
-		rv = try_init_plug_and_play(intf_num, &new_smi);
+	return 1;
+}
 
-	if (rv)
-		return rv;
+static int try_smi_init(struct smi_info *new_smi)
+{
+	int rv;
+
+	if (new_smi->addr_source) {
+		printk(KERN_INFO "ipmi_si: Trying %s-specified %s state"
+		       " machine at %s address 0x%lx, slave address 0x%x,"
+		       " irq %d\n",
+		       new_smi->addr_source,
+		       si_to_str[new_smi->si_type],
+		       addr_space_to_str[new_smi->io.addr_type],
+		       new_smi->io.addr_data,
+		       new_smi->slave_addr, new_smi->irq);
+	}
+
+	down(&smi_infos_lock);
+	if (!is_new_interface(new_smi)) {
+		printk(KERN_WARNING "ipmi_si: duplicate interface\n");
+		rv = -EBUSY;
+		goto out_err;
+	}
 
 	/* So we know not to free it unless we have allocated one. */
 	new_smi->intf = NULL;
 	new_smi->si_sm = NULL;
 	new_smi->handlers = NULL;
 
-	if (! new_smi->irq_setup) {
-		new_smi->irq = irqs[intf_num];
-		new_smi->irq_setup = std_irq_setup;
-		new_smi->irq_cleanup = std_irq_cleanup;
-	}
-
-	/* Default to KCS if no type is specified. */
-	if (si_type[intf_num] == NULL) {
-		if (si_trydefaults)
-			si_type[intf_num] = "kcs";
-		else {
-			rv = -EINVAL;
-			goto out_err;
-		}
-	}
-
-	/* Set up the state machine to use. */
-	if (strcmp(si_type[intf_num], "kcs") == 0) {
+	switch (new_smi->si_type) {
+	case SI_KCS:
 		new_smi->handlers = &kcs_smi_handlers;
-		new_smi->si_type = SI_KCS;
-	} else if (strcmp(si_type[intf_num], "smic") == 0) {
+		break;
+
+	case SI_SMIC:
 		new_smi->handlers = &smic_smi_handlers;
-		new_smi->si_type = SI_SMIC;
-	} else if (strcmp(si_type[intf_num], "bt") == 0) {
+		break;
+
+	case SI_BT:
 		new_smi->handlers = &bt_smi_handlers;
-		new_smi->si_type = SI_BT;
-	} else {
+		break;
+
+	default:
 		/* No support for anything else yet. */
 		rv = -EIO;
 		goto out_err;
@@ -2263,7 +2280,7 @@ static int init_one_smi(int intf_num, struct smi_info **smi)
 
 	/* Allocate the state machine's data and initialize it. */
 	new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL);
-	if (! new_smi->si_sm) {
+	if (!new_smi->si_sm) {
 		printk(" Could not allocate state machine memory\n");
 		rv = -ENOMEM;
 		goto out_err;
@@ -2284,21 +2301,29 @@ static int init_one_smi(int intf_num, struct smi_info **smi)
 
 	/* Do low-level detection first. */
 	if (new_smi->handlers->detect(new_smi->si_sm)) {
+		if (new_smi->addr_source)
+			printk(KERN_INFO "ipmi_si: Interface detection"
+			       " failed\n");
 		rv = -ENODEV;
 		goto out_err;
 	}
 
 	/* Attempt a get device id command.  If it fails, we probably
-           don't have a SMI here. */
+           don't have a BMC here. */
 	rv = try_get_dev_id(new_smi);
-	if (rv)
+	if (rv) {
+		if (new_smi->addr_source)
+			printk(KERN_INFO "ipmi_si: There appears to be no BMC"
+			       " at this location\n");
 		goto out_err;
+	}
 
 	setup_oem_data_handler(new_smi);
 	setup_xaction_handlers(new_smi);
 
 	/* Try to claim any interrupts. */
-	new_smi->irq_setup(new_smi);
+	if (new_smi->irq_setup)
+		new_smi->irq_setup(new_smi);
 
 	INIT_LIST_HEAD(&(new_smi->xmit_msgs));
 	INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs));
@@ -2308,7 +2333,8 @@ static int init_one_smi(int intf_num, struct smi_info **smi)
 
 	new_smi->interrupt_disabled = 0;
 	atomic_set(&new_smi->stop_operation, 0);
-	new_smi->intf_num = intf_num;
+	new_smi->intf_num = smi_num;
+	smi_num++;
 
 	/* Start clearing the flags before we enable interrupts or the
 	   timer to avoid racing with the timer. */
@@ -2365,9 +2391,11 @@ static int init_one_smi(int intf_num, struct smi_info **smi)
 		goto out_err_stop_timer;
 	}
 
-	*smi = new_smi;
+	list_add_tail(&new_smi->link, &smi_infos);
+
+	up(&smi_infos_lock);
 
-	printk(" IPMI %s interface initialized\n", si_type[intf_num]);
+	printk(" IPMI %s interface initialized\n",si_to_str[new_smi->si_type]);
 
 	return 0;
 
@@ -2379,7 +2407,8 @@ static int init_one_smi(int intf_num, struct smi_info **smi)
 	if (new_smi->intf)
 		ipmi_unregister_smi(new_smi->intf);
 
-	new_smi->irq_cleanup(new_smi);
+	if (new_smi->irq_cleanup)
+		new_smi->irq_cleanup(new_smi);
 
 	/* Wait until we know that we are out of any interrupt
 	   handlers might have been running before we freed the
@@ -2391,16 +2420,18 @@ static int init_one_smi(int intf_num, struct smi_info **smi)
 			new_smi->handlers->cleanup(new_smi->si_sm);
 		kfree(new_smi->si_sm);
 	}
+	if (new_smi->addr_source_cleanup)
+		new_smi->addr_source_cleanup(new_smi);
 	if (new_smi->io_cleanup)
 		new_smi->io_cleanup(new_smi);
 
+	up(&smi_infos_lock);
+
 	return rv;
 }
 
-static __init int init_ipmi_si(void)
+static __devinit int init_ipmi_si(void)
 {
-	int  rv = 0;
-	int  pos = 0;
 	int  i;
 	char *str;
 
@@ -2425,63 +2456,66 @@ static __init int init_ipmi_si(void)
 
 	printk(KERN_INFO "IPMI System Interface driver.\n");
 
+	hardcode_find_bmc();
+
 #ifdef CONFIG_DMI
 	dmi_find_bmc();
 #endif
 
-	rv = init_one_smi(0, &(smi_infos[pos]));
-	if (rv && ! ports[0] && si_trydefaults) {
-		/* If we are trying defaults and the initial port is
-                   not set, then set it. */
-		si_type[0] = "kcs";
-		ports[0] = DEFAULT_KCS_IO_PORT;
-		rv = init_one_smi(0, &(smi_infos[pos]));
-		if (rv) {
-			/* No KCS - try SMIC */
-			si_type[0] = "smic";
-			ports[0] = DEFAULT_SMIC_IO_PORT;
-			rv = init_one_smi(0, &(smi_infos[pos]));
-		}
-		if (rv) {
-			/* No SMIC - try BT */
-			si_type[0] = "bt";
-			ports[0] = DEFAULT_BT_IO_PORT;
-			rv = init_one_smi(0, &(smi_infos[pos]));
-		}
-	}
-	if (rv == 0)
-		pos++;
+#ifdef CONFIG_ACPI
+	if (si_trydefaults)
+		acpi_find_bmc();
+#endif
 
-	for (i = 1; i < SI_MAX_PARMS; i++) {
-		rv = init_one_smi(i, &(smi_infos[pos]));
-		if (rv == 0)
-			pos++;
+#ifdef CONFIG_PCI
+	pci_module_init(&ipmi_pci_driver);
+#endif
+
+	if (si_trydefaults) {
+		down(&smi_infos_lock);
+		if (list_empty(&smi_infos)) {
+			/* No BMC was found, try defaults. */
+			up(&smi_infos_lock);
+			default_find_bmc();
+		} else {
+			up(&smi_infos_lock);
+		}
 	}
 
-	if (smi_infos[0] == NULL) {
+	down(&smi_infos_lock);
+	if (list_empty(&smi_infos)) {
+		up(&smi_infos_lock);
+#ifdef CONFIG_PCI
+		pci_unregister_driver(&ipmi_pci_driver);
+#endif
 		printk("ipmi_si: Unable to find any System Interface(s)\n");
 		return -ENODEV;
+	} else {
+		up(&smi_infos_lock);
+		return 0;
 	}
-
-	return 0;
 }
 module_init(init_ipmi_si);
 
-static void __exit cleanup_one_si(struct smi_info *to_clean)
+static void __devexit cleanup_one_si(struct smi_info *to_clean)
 {
 	int           rv;
 	unsigned long flags;
 
-	if (! to_clean)
+	if (!to_clean)
 		return;
 
+	list_del(&to_clean->link);
+
 	/* Tell the timer and interrupt handlers that we are shutting
 	   down. */
 	spin_lock_irqsave(&(to_clean->si_lock), flags);
 	spin_lock(&(to_clean->msg_lock));
 
 	atomic_inc(&to_clean->stop_operation);
-	to_clean->irq_cleanup(to_clean);
+
+	if (to_clean->irq_cleanup)
+		to_clean->irq_cleanup(to_clean);
 
 	spin_unlock(&(to_clean->msg_lock));
 	spin_unlock_irqrestore(&(to_clean->si_lock), flags);
@@ -2511,20 +2545,27 @@ static void __exit cleanup_one_si(struct smi_info *to_clean)
 
 	kfree(to_clean->si_sm);
 
+	if (to_clean->addr_source_cleanup)
+		to_clean->addr_source_cleanup(to_clean);
 	if (to_clean->io_cleanup)
 		to_clean->io_cleanup(to_clean);
 }
 
 static __exit void cleanup_ipmi_si(void)
 {
-	int i;
+	struct smi_info *e, *tmp_e;
 
-	if (! initialized)
+	if (!initialized)
 		return;
 
-	for (i = 0; i < SI_MAX_DRIVERS; i++) {
-		cleanup_one_si(smi_infos[i]);
-	}
+#ifdef CONFIG_PCI
+	pci_unregister_driver(&ipmi_pci_driver);
+#endif
+
+	down(&smi_infos_lock);
+	list_for_each_entry_safe(e, tmp_e, &smi_infos, link)
+		cleanup_one_si(e);
+	up(&smi_infos_lock);
 }
 module_exit(cleanup_ipmi_si);
 
diff --git a/drivers/char/ipmi/ipmi_si_sm.h b/drivers/char/ipmi/ipmi_si_sm.h
index bf3d4962d6a5973c51d99f21cb7b5de0ad2be867..4b731b24dc16c79d2e688edafe9ac20837f60e45 100644
--- a/drivers/char/ipmi/ipmi_si_sm.h
+++ b/drivers/char/ipmi/ipmi_si_sm.h
@@ -50,11 +50,12 @@ struct si_sm_io
 
 	/* Generic info used by the actual handling routines, the
            state machine shouldn't touch these. */
-	void *info;
 	void __iomem *addr;
 	int  regspacing;
 	int  regsize;
 	int  regshift;
+	int addr_type;
+	long addr_data;
 };
 
 /* Results of SMI events. */