Merge tag 'for-linus-4.10' of git://git.code.sf.net/p/openipmi/linux-ipmi

Pull IPMI updates from Corey Minyard:
 "Various small fixes for IPMI. Cleanups in the documentation and
  convertion printk() to pr_xxx() and removal of an unused module
  parameter. Some small bug fixes and enhancements.

  This also adds a post softdep from the IPMI core module to the IPMI
  device interface. Many people have complained that the device
  interface isn't automatically avaiable when IPMI is loaded. I don't
  want to make the device interface mandatory, though, plenty of people
  use IPMI internally (like with ACPI) and don't need a device interface
  or the added possible security entry. A softdep should make it work
  'out of the box' but allow people to not have it if they don't want
  it"

* tag 'for-linus-4.10' of git://git.code.sf.net/p/openipmi/linux-ipmi:
  ipmi: create hardware-independent softdep for ipmi_devintf
  ipmi: Fix sequence number handling
  ipmi: Pick up slave address from SMBIOS on an ACPI device
  ipmi_si: Clean up printks
  Move platform device creation earlier in the initialization
  ipmi: Update documentation
  ipmi_ssif: Remove an unused module parameter
  ipmi: Periodically check for events, not messages

5 files changed, 165 insertions, 130 deletions

diff --git a/Documentation/IPMI.txt b/Documentation/IPMI.txt
index c0d8788e75d3..72292308d0f5 100644
--- a/Documentation/IPMI.txt
+++ b/Documentation/IPMI.txt
@@ -111,6 +111,8 @@ ipmi_ssif - A driver for accessing BMCs on the SMBus. It uses the
 I2C kernel driver's SMBus interfaces to send and receive IPMI messages
 over the SMBus.
 
+ipmi_powernv - A driver for access BMCs on POWERNV systems.
+
 ipmi_watchdog - IPMI requires systems to have a very capable watchdog
 timer.  This driver implements the standard Linux watchdog timer
 interface on top of the IPMI message handler.
@@ -118,17 +120,15 @@ interface on top of the IPMI message handler.
 ipmi_poweroff - Some systems support the ability to be turned off via
 IPMI commands.
 
-These are all individually selectable via configuration options.
+bt-bmc - This is not part of the main driver, but instead a driver for
+accessing a BMC-side interface of a BT interface.  It is used on BMCs
+running Linux to provide an interface to the host.
 
-Note that the KCS-only interface has been removed.  The af_ipmi driver
-is no longer supported and has been removed because it was impossible
-to do 32 bit emulation on 64-bit kernels with it.
+These are all individually selectable via configuration options.
 
 Much documentation for the interface is in the include files.  The
 IPMI include files are:
 
-net/af_ipmi.h - Contains the socket interface.
-
 linux/ipmi.h - Contains the user interface and IOCTL interface for IPMI.
 
 linux/ipmi_smi.h - Contains the interface for system management interfaces
@@ -245,6 +245,16 @@ addressed (because some boards actually have multiple BMCs on them)
 and the user should not have to care what type of SMI is below them.
 
 
+Watching For Interfaces
+
+When your code comes up, the IPMI driver may or may not have detected
+if IPMI devices exist.  So you might have to defer your setup until
+the device is detected, or you might be able to do it immediately.
+To handle this, and to allow for discovery, you register an SMI
+watcher with ipmi_smi_watcher_register() to iterate over interfaces
+and tell you when they come and go.
+
+
 Creating the User
 
 To user the message handler, you must first create a user using
@@ -263,7 +273,7 @@ closing the device automatically destroys the user.
 
 Messaging
 
-To send a message from kernel-land, the ipmi_request() call does
+To send a message from kernel-land, the ipmi_request_settime() call does
 pretty much all message handling.  Most of the parameter are
 self-explanatory.  However, it takes a "msgid" parameter.  This is NOT
 the sequence number of messages.  It is simply a long value that is
@@ -352,11 +362,12 @@ that for more details.
 The SI Driver
 -------------
 
-The SI driver allows up to 4 KCS or SMIC interfaces to be configured
-in the system.  By default, scan the ACPI tables for interfaces, and
-if it doesn't find any the driver will attempt to register one KCS
-interface at the spec-specified I/O port 0xca2 without interrupts.
-You can change this at module load time (for a module) with:
+The SI driver allows KCS, BT, and SMIC interfaces to be configured
+in the system.  It discovers interfaces through a host of different
+methods, depending on the system.
+
+You can specify up to four interfaces on the module load line and
+control some module parameters:
 
   modprobe ipmi_si.o type=<type1>,<type2>....
        ports=<port1>,<port2>... addrs=<addr1>,<addr2>...
@@ -367,7 +378,7 @@ You can change this at module load time (for a module) with:
        force_kipmid=<enable1>,<enable2>,...
        kipmid_max_busy_us=<ustime1>,<ustime2>,...
        unload_when_empty=[0|1]
-       trydefaults=[0|1] trydmi=[0|1] tryacpi=[0|1]
+       trydmi=[0|1] tryacpi=[0|1]
        tryplatform=[0|1] trypci=[0|1]
 
 Each of these except try... items is a list, the first item for the
@@ -386,10 +397,6 @@ use the I/O port given as the device address.
 If you specify irqs as non-zero for an interface, the driver will
 attempt to use the given interrupt for the device.
 
-trydefaults sets whether the standard IPMI interface at 0xca2 and
-any interfaces specified by ACPE are tried.  By default, the driver
-tries it, set this value to zero to turn this off.
-
 The other try... items disable discovery by their corresponding
 names.  These are all enabled by default, set them to zero to disable
 them.  The tryplatform disables openfirmware.
@@ -434,7 +441,7 @@ kernel command line as:
 
   ipmi_si.type=<type1>,<type2>...
        ipmi_si.ports=<port1>,<port2>... ipmi_si.addrs=<addr1>,<addr2>...
-       ipmi_si.irqs=<irq1>,<irq2>... ipmi_si.trydefaults=[0|1]
+       ipmi_si.irqs=<irq1>,<irq2>...
        ipmi_si.regspacings=<sp1>,<sp2>,...
        ipmi_si.regsizes=<size1>,<size2>,...
        ipmi_si.regshifts=<shift1>,<shift2>,...
@@ -444,11 +451,6 @@ kernel command line as:
 
 It works the same as the module parameters of the same names.
 
-By default, the driver will attempt to detect any device specified by
-ACPI, and if none of those then a KCS device at the spec-specified
-0xca2.  If you want to turn this off, set the "trydefaults" option to
-false.
-
 If your IPMI interface does not support interrupts and is a KCS or
 SMIC interface, the IPMI driver will start a kernel thread for the
 interface to help speed things up.  This is a low-priority kernel
@@ -500,7 +502,8 @@ at module load time (for a module) with:
 	addr=<i2caddr1>[,<i2caddr2>[,...]]
 	adapter=<adapter1>[,<adapter2>[...]]
 	dbg=<flags1>,<flags2>...
-        slave_addrs=<addr1>,<addr2>,...
+	slave_addrs=<addr1>,<addr2>,...
+	tryacpi=[0|1] trydmi=[0|1]
 	[dbg_probe=1]
 
 The addresses are normal I2C addresses.  The adapter is the string
@@ -513,6 +516,9 @@ spaces in kernel parameters.
 The debug flags are bit flags for each BMC found, they are:
 IPMI messages: 1, driver state: 2, timing: 4, I2C probe: 8
 
+The tryxxx parameters can be used to disable detecting interfaces
+from various sources.
+
 Setting dbg_probe to 1 will enable debugging of the probing and
 detection process for BMCs on the SMBusses.
 
@@ -535,7 +541,8 @@ kernel command line as:
 	ipmi_ssif.adapter=<adapter1>[,<adapter2>[...]]
 	ipmi_ssif.dbg=<flags1>[,<flags2>[...]]
 	ipmi_ssif.dbg_probe=1
-        ipmi_ssif.slave_addrs=<addr1>[,<addr2>[...]]
+	ipmi_ssif.slave_addrs=<addr1>[,<addr2>[...]]
+	ipmi_ssif.tryacpi=[0|1] ipmi_ssif.trydmi=[0|1]
 
 These are the same options as on the module command line.
 
diff --git a/drivers/char/ipmi/ipmi_devintf.c b/drivers/char/ipmi/ipmi_devintf.c
index 1786574536b2..a21407de46ae 100644
--- a/drivers/char/ipmi/ipmi_devintf.c
+++ b/drivers/char/ipmi/ipmi_devintf.c
@@ -989,4 +989,3 @@ module_exit(cleanup_ipmi);
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
 MODULE_DESCRIPTION("Linux device interface for the IPMI message handler.");
-MODULE_ALIAS("platform:ipmi_si");
diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c
index fcdd886819f5..92e53acf2cd2 100644
--- a/drivers/char/ipmi/ipmi_msghandler.c
+++ b/drivers/char/ipmi/ipmi_msghandler.c
@@ -158,15 +158,16 @@ struct seq_table {
  * Store the information in a msgid (long) to allow us to find a
  * sequence table entry from the msgid.
  */
-#define STORE_SEQ_IN_MSGID(seq, seqid) (((seq&0xff)<<26) | (seqid&0x3ffffff))
+#define STORE_SEQ_IN_MSGID(seq, seqid) \
+	((((seq) & 0x3f) << 26) | ((seqid) & 0x3ffffff))
 
 #define GET_SEQ_FROM_MSGID(msgid, seq, seqid) \
 	do {								\
-		seq = ((msgid >> 26) & 0x3f);				\
-		seqid = (msgid & 0x3fffff);				\
+		seq = (((msgid) >> 26) & 0x3f);				\
+		seqid = ((msgid) & 0x3ffffff);				\
 	} while (0)
 
-#define NEXT_SEQID(seqid) (((seqid) + 1) & 0x3fffff)
+#define NEXT_SEQID(seqid) (((seqid) + 1) & 0x3ffffff)
 
 struct ipmi_channel {
 	unsigned char medium;
@@ -4645,3 +4646,4 @@ MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
 MODULE_DESCRIPTION("Incoming and outgoing message routing for an IPMI"
 		   " interface.");
 MODULE_VERSION(IPMI_DRIVER_VERSION);
+MODULE_SOFTDEP("post: ipmi_devintf");
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index a112c0146012..2a7c425ddfa7 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -789,7 +789,7 @@ static void handle_transaction_done(struct smi_info *smi_info)
 				smi_info->si_state = SI_NORMAL;
 				break;
 			}
-			start_getting_msg_queue(smi_info);
+			start_getting_events(smi_info);
 		} else {
 			smi_info->si_state = SI_NORMAL;
 		}
@@ -812,7 +812,7 @@ static void handle_transaction_done(struct smi_info *smi_info)
 				smi_info->si_state = SI_NORMAL;
 				break;
 			}
-			start_getting_msg_queue(smi_info);
+			start_getting_events(smi_info);
 		} else {
 			smi_info->si_state = SI_NORMAL;
 		}
@@ -1764,7 +1764,7 @@ static int parse_str(const struct hotmod_vals *v, int *val, char *name,
 
 	s = strchr(*curr, ',');
 	if (!s) {
-		printk(KERN_WARNING PFX "No hotmod %s given.\n", name);
+		pr_warn(PFX "No hotmod %s given.\n", name);
 		return -EINVAL;
 	}
 	*s = '\0';
@@ -1777,7 +1777,7 @@ static int parse_str(const struct hotmod_vals *v, int *val, char *name,
 		}
 	}
 
-	printk(KERN_WARNING PFX "Invalid hotmod %s '%s'\n", name, *curr);
+	pr_warn(PFX "Invalid hotmod %s '%s'\n", name, *curr);
 	return -EINVAL;
 }
 
@@ -1788,16 +1788,12 @@ static int check_hotmod_int_op(const char *curr, const char *option,
 
 	if (strcmp(curr, name) == 0) {
 		if (!option) {
-			printk(KERN_WARNING PFX
-			       "No option given for '%s'\n",
-			       curr);
+			pr_warn(PFX "No option given for '%s'\n", curr);
 			return -EINVAL;
 		}
 		*val = simple_strtoul(option, &n, 0);
 		if ((*n != '\0') || (*option == '\0')) {
-			printk(KERN_WARNING PFX
-			       "Bad option given for '%s'\n",
-			       curr);
+			pr_warn(PFX "Bad option given for '%s'\n", curr);
 			return -EINVAL;
 		}
 		return 1;
@@ -1877,8 +1873,7 @@ static int hotmod_handler(const char *val, struct kernel_param *kp)
 		}
 		addr = simple_strtoul(curr, &n, 0);
 		if ((*n != '\0') || (*curr == '\0')) {
-			printk(KERN_WARNING PFX "Invalid hotmod address"
-			       " '%s'\n", curr);
+			pr_warn(PFX "Invalid hotmod address '%s'\n", curr);
 			break;
 		}
 
@@ -1921,9 +1916,7 @@ static int hotmod_handler(const char *val, struct kernel_param *kp)
 				continue;
 
 			rv = -EINVAL;
-			printk(KERN_WARNING PFX
-			       "Invalid hotmod option '%s'\n",
-			       curr);
+			pr_warn(PFX "Invalid hotmod option '%s'\n", curr);
 			goto out;
 		}
 
@@ -2003,7 +1996,7 @@ static int hardcode_find_bmc(void)
 			return -ENOMEM;
 
 		info->addr_source = SI_HARDCODED;
-		printk(KERN_INFO PFX "probing via hardcoded address\n");
+		pr_info(PFX "probing via hardcoded address\n");
 
 		if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) {
 			info->si_type = SI_KCS;
@@ -2012,9 +2005,8 @@ static int hardcode_find_bmc(void)
 		} else if (strcmp(si_type[i], "bt") == 0) {
 			info->si_type = SI_BT;
 		} else {
-			printk(KERN_WARNING PFX "Interface type specified "
-			       "for interface %d, was invalid: %s\n",
-			       i, si_type[i]);
+			pr_warn(PFX "Interface type specified for interface %d, was invalid: %s\n",
+				i, si_type[i]);
 			kfree(info);
 			continue;
 		}
@@ -2030,9 +2022,8 @@ static int hardcode_find_bmc(void)
 			info->io.addr_data = addrs[i];
 			info->io.addr_type = IPMI_MEM_ADDR_SPACE;
 		} else {
-			printk(KERN_WARNING PFX "Interface type specified "
-			       "for interface %d, but port and address were "
-			       "not set or set to zero.\n", i);
+			pr_warn(PFX "Interface type specified for interface %d, but port and address were not set or set to zero.\n",
+				i);
 			kfree(info);
 			continue;
 		}
@@ -2173,18 +2164,18 @@ static int try_init_spmi(struct SPMITable *spmi)
 	int rv;
 
 	if (spmi->IPMIlegacy != 1) {
-		printk(KERN_INFO PFX "Bad SPMI legacy %d\n", spmi->IPMIlegacy);
+		pr_info(PFX "Bad SPMI legacy %d\n", spmi->IPMIlegacy);
 		return -ENODEV;
 	}
 
 	info = smi_info_alloc();
 	if (!info) {
-		printk(KERN_ERR PFX "Could not allocate SI data (3)\n");
+		pr_err(PFX "Could not allocate SI data (3)\n");
 		return -ENOMEM;
 	}
 
 	info->addr_source = SI_SPMI;
-	printk(KERN_INFO PFX "probing via SPMI\n");
+	pr_info(PFX "probing via SPMI\n");
 
 	/* Figure out the interface type. */
 	switch (spmi->InterfaceType) {
@@ -2201,8 +2192,8 @@ static int try_init_spmi(struct SPMITable *spmi)
 		kfree(info);
 		return -EIO;
 	default:
-		printk(KERN_INFO PFX "Unknown ACPI/SPMI SI type %d\n",
-		       spmi->InterfaceType);
+		pr_info(PFX "Unknown ACPI/SPMI SI type %d\n",
+			spmi->InterfaceType);
 		kfree(info);
 		return -EIO;
 	}
@@ -2238,15 +2229,15 @@ static int try_init_spmi(struct SPMITable *spmi)
 		info->io.addr_type = IPMI_IO_ADDR_SPACE;
 	} else {
 		kfree(info);
-		printk(KERN_WARNING PFX "Unknown ACPI I/O Address type\n");
+		pr_warn(PFX "Unknown ACPI I/O Address type\n");
 		return -EIO;
 	}
 	info->io.addr_data = spmi->addr.address;
 
 	pr_info("ipmi_si: SPMI: %s %#lx regsize %d spacing %d irq %d\n",
-		 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
-		 info->io.addr_data, info->io.regsize, info->io.regspacing,
-		 info->irq);
+		(info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
+		info->io.addr_data, info->io.regsize, info->io.regspacing,
+		info->irq);
 
 	rv = add_smi(info);
 	if (rv)
@@ -2356,12 +2347,12 @@ static void try_init_dmi(struct dmi_ipmi_data *ipmi_data)
 
 	info = smi_info_alloc();
 	if (!info) {
-		printk(KERN_ERR PFX "Could not allocate SI data\n");
+		pr_err(PFX "Could not allocate SI data\n");
 		return;
 	}
 
 	info->addr_source = SI_SMBIOS;
-	printk(KERN_INFO PFX "probing via SMBIOS\n");
+	pr_info(PFX "probing via SMBIOS\n");
 
 	switch (ipmi_data->type) {
 	case 0x01: /* KCS */
@@ -2391,8 +2382,8 @@ static void try_init_dmi(struct dmi_ipmi_data *ipmi_data)
 
 	default:
 		kfree(info);
-		printk(KERN_WARNING PFX "Unknown SMBIOS I/O Address type: %d\n",
-		       ipmi_data->addr_space);
+		pr_warn(PFX "Unknown SMBIOS I/O Address type: %d\n",
+			ipmi_data->addr_space);
 		return;
 	}
 	info->io.addr_data = ipmi_data->base_addr;
@@ -2410,9 +2401,9 @@ static void try_init_dmi(struct dmi_ipmi_data *ipmi_data)
 		info->irq_setup = std_irq_setup;
 
 	pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n",
-		 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
-		 info->io.addr_data, info->io.regsize, info->io.regspacing,
-		 info->irq);
+		(info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
+		info->io.addr_data, info->io.regsize, info->io.regspacing,
+		info->irq);
 
 	if (add_smi(info))
 		kfree(info);
@@ -3141,9 +3132,7 @@ static int try_enable_event_buffer(struct smi_info *smi_info)
 
 	rv = wait_for_msg_done(smi_info);
 	if (rv) {
-		printk(KERN_WARNING PFX "Error getting response from get"
-		       " global enables command, the event buffer is not"
-		       " enabled.\n");
+		pr_warn(PFX "Error getting response from get global enables command, the event buffer is not enabled.\n");
 		goto out;
 	}
 
@@ -3154,8 +3143,7 @@ static int try_enable_event_buffer(struct smi_info *smi_info)
 			resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
 			resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD   ||
 			resp[2] != 0) {
-		printk(KERN_WARNING PFX "Invalid return from get global"
-		       " enables command, cannot enable the event buffer.\n");
+		pr_warn(PFX "Invalid return from get global enables command, cannot enable the event buffer.\n");
 		rv = -EINVAL;
 		goto out;
 	}
@@ -3173,9 +3161,7 @@ static int try_enable_event_buffer(struct smi_info *smi_info)
 
 	rv = wait_for_msg_done(smi_info);
 	if (rv) {
-		printk(KERN_WARNING PFX "Error getting response from set"
-		       " global, enables command, the event buffer is not"
-		       " enabled.\n");
+		pr_warn(PFX "Error getting response from set global, enables command, the event buffer is not enabled.\n");
 		goto out;
 	}
 
@@ -3185,8 +3171,7 @@ static int try_enable_event_buffer(struct smi_info *smi_info)
 	if (resp_len < 3 ||
 			resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
 			resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) {
-		printk(KERN_WARNING PFX "Invalid return from get global,"
-		       "enables command, not enable the event buffer.\n");
+		pr_warn(PFX "Invalid return from get global, enables command, not enable the event buffer.\n");
 		rv = -EINVAL;
 		goto out;
 	}
@@ -3463,8 +3448,16 @@ static int is_new_interface(struct smi_info *info)
 	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)
+		if (e->io.addr_data == info->io.addr_data) {
+			/*
+			 * This is a cheap hack, ACPI doesn't have a defined
+			 * slave address but SMBIOS does.  Pick it up from
+			 * any source that has it available.
+			 */
+			if (info->slave_addr && !e->slave_addr)
+				e->slave_addr = info->slave_addr;
 			return 0;
+		}
 	}
 
 	return 1;
@@ -3474,17 +3467,18 @@ static int add_smi(struct smi_info *new_smi)
 {
 	int rv = 0;
 
-	printk(KERN_INFO PFX "Adding %s-specified %s state machine",
-	       ipmi_addr_src_to_str(new_smi->addr_source),
-	       si_to_str[new_smi->si_type]);
 	mutex_lock(&smi_infos_lock);
 	if (!is_new_interface(new_smi)) {
-		printk(KERN_CONT " duplicate interface\n");
+		pr_info(PFX "%s-specified %s state machine: duplicate\n",
+			ipmi_addr_src_to_str(new_smi->addr_source),
+			si_to_str[new_smi->si_type]);
 		rv = -EBUSY;
 		goto out_err;
 	}
 
-	printk(KERN_CONT "\n");
+	pr_info(PFX "Adding %s-specified %s state machine\n",
+		ipmi_addr_src_to_str(new_smi->addr_source),
+		si_to_str[new_smi->si_type]);
 
 	/* So we know not to free it unless we have allocated one. */
 	new_smi->intf = NULL;
@@ -3502,15 +3496,14 @@ static int try_smi_init(struct smi_info *new_smi)
 {
 	int rv = 0;
 	int i;
+	char *init_name = NULL;
 
-	printk(KERN_INFO PFX "Trying %s-specified %s state"
-	       " machine at %s address 0x%lx, slave address 0x%x,"
-	       " irq %d\n",
-	       ipmi_addr_src_to_str(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);
+	pr_info(PFX "Trying %s-specified %s state machine at %s address 0x%lx, slave address 0x%x, irq %d\n",
+		ipmi_addr_src_to_str(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);
 
 	switch (new_smi->si_type) {
 	case SI_KCS:
@@ -3531,11 +3524,30 @@ static int try_smi_init(struct smi_info *new_smi)
 		goto out_err;
 	}
 
+	/* Do this early so it's available for logs. */
+	if (!new_smi->dev) {
+		init_name = kasprintf(GFP_KERNEL, "ipmi_si.%d", 0);
+
+		/*
+		 * If we don't already have a device from something
+		 * else (like PCI), then register a new one.
+		 */
+		new_smi->pdev = platform_device_alloc("ipmi_si",
+						      new_smi->intf_num);
+		if (!new_smi->pdev) {
+			pr_err(PFX "Unable to allocate platform device\n");
+			goto out_err;
+		}
+		new_smi->dev = &new_smi->pdev->dev;
+		new_smi->dev->driver = &ipmi_driver.driver;
+		/* Nulled by device_add() */
+		new_smi->dev->init_name = init_name;
+	}
+
 	/* 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) {
-		printk(KERN_ERR PFX
-		       "Could not allocate state machine memory\n");
+		pr_err(PFX "Could not allocate state machine memory\n");
 		rv = -ENOMEM;
 		goto out_err;
 	}
@@ -3545,14 +3557,14 @@ static int try_smi_init(struct smi_info *new_smi)
 	/* Now that we know the I/O size, we can set up the I/O. */
 	rv = new_smi->io_setup(new_smi);
 	if (rv) {
-		printk(KERN_ERR PFX "Could not set up I/O space\n");
+		dev_err(new_smi->dev, "Could not set up I/O space\n");
 		goto out_err;
 	}
 
 	/* Do low-level detection first. */
 	if (new_smi->handlers->detect(new_smi->si_sm)) {
 		if (new_smi->addr_source)
-			printk(KERN_INFO PFX "Interface detection failed\n");
+			dev_err(new_smi->dev, "Interface detection failed\n");
 		rv = -ENODEV;
 		goto out_err;
 	}
@@ -3564,8 +3576,7 @@ static int try_smi_init(struct smi_info *new_smi)
 	rv = try_get_dev_id(new_smi);
 	if (rv) {
 		if (new_smi->addr_source)
-			printk(KERN_INFO PFX "There appears to be no BMC"
-			       " at this location\n");
+			dev_err(new_smi->dev, "There appears to be no BMC at this location\n");
 		goto out_err;
 	}
 
@@ -3604,27 +3615,12 @@ static int try_smi_init(struct smi_info *new_smi)
 		atomic_set(&new_smi->req_events, 1);
 	}
 
-	if (!new_smi->dev) {
-		/*
-		 * If we don't already have a device from something
-		 * else (like PCI), then register a new one.
-		 */
-		new_smi->pdev = platform_device_alloc("ipmi_si",
-						      new_smi->intf_num);
-		if (!new_smi->pdev) {
-			printk(KERN_ERR PFX
-			       "Unable to allocate platform device\n");
-			goto out_err;
-		}
-		new_smi->dev = &new_smi->pdev->dev;
-		new_smi->dev->driver = &ipmi_driver.driver;
-
+	if (new_smi->pdev) {
 		rv = platform_device_add(new_smi->pdev);
 		if (rv) {
-			printk(KERN_ERR PFX
-			       "Unable to register system interface device:"
-			       " %d\n",
-			       rv);
+			dev_err(new_smi->dev,
+				"Unable to register system interface device: %d\n",
+				rv);
 			goto out_err;
 		}
 		new_smi->dev_registered = true;
@@ -3668,6 +3664,9 @@ static int try_smi_init(struct smi_info *new_smi)
 	dev_info(new_smi->dev, "IPMI %s interface initialized\n",
 		 si_to_str[new_smi->si_type]);
 
+	WARN_ON(new_smi->dev->init_name != NULL);
+	kfree(init_name);
+
 	return 0;
 
 out_err_stop_timer:
@@ -3712,8 +3711,14 @@ out_err:
 	if (new_smi->dev_registered) {
 		platform_device_unregister(new_smi->pdev);
 		new_smi->dev_registered = false;
+		new_smi->pdev = NULL;
+	} else if (new_smi->pdev) {
+		platform_device_put(new_smi->pdev);
+		new_smi->pdev = NULL;
 	}
 
+	kfree(init_name);
+
 	return rv;
 }
 
@@ -3732,8 +3737,7 @@ static int init_ipmi_si(void)
 	if (si_tryplatform) {
 		rv = platform_driver_register(&ipmi_driver);
 		if (rv) {
-			printk(KERN_ERR PFX "Unable to register "
-			       "driver: %d\n", rv);
+			pr_err(PFX "Unable to register driver: %d\n", rv);
 			return rv;
 		}
 	}
@@ -3753,7 +3757,7 @@ static int init_ipmi_si(void)
 		}
 	}
 
-	printk(KERN_INFO "IPMI System Interface driver.\n");
+	pr_info("IPMI System Interface driver.\n");
 
 	/* If the user gave us a device, they presumably want us to use it */
 	if (!hardcode_find_bmc())
@@ -3763,8 +3767,7 @@ static int init_ipmi_si(void)
 	if (si_trypci) {
 		rv = pci_register_driver(&ipmi_pci_driver);
 		if (rv)
-			printk(KERN_ERR PFX "Unable to register "
-			       "PCI driver: %d\n", rv);
+			pr_err(PFX "Unable to register PCI driver: %d\n", rv);
 		else
 			pci_registered = true;
 	}
@@ -3826,8 +3829,7 @@ static int init_ipmi_si(void)
 	if (unload_when_empty && list_empty(&smi_infos)) {
 		mutex_unlock(&smi_infos_lock);
 		cleanup_ipmi_si();
-		printk(KERN_WARNING PFX
-		       "Unable to find any System Interface(s)\n");
+		pr_warn(PFX "Unable to find any System Interface(s)\n");
 		return -ENODEV;
 	} else {
 		mutex_unlock(&smi_infos_lock);
diff --git a/drivers/char/ipmi/ipmi_ssif.c b/drivers/char/ipmi/ipmi_ssif.c
index 5673ffff00be..cca6e5bc1cea 100644
--- a/drivers/char/ipmi/ipmi_ssif.c
+++ b/drivers/char/ipmi/ipmi_ssif.c
@@ -174,7 +174,6 @@ enum ssif_stat_indexes {
 };
 
 struct ssif_addr_info {
-	unsigned short addr;
 	struct i2c_board_info binfo;
 	char *adapter_name;
 	int debug;
@@ -1154,10 +1153,6 @@ static bool ssif_dbg_probe;
 module_param_named(dbg_probe, ssif_dbg_probe, bool, 0);
 MODULE_PARM_DESC(dbg_probe, "Enable debugging of probing of adapters.");
 
-static int use_thread;
-module_param(use_thread, int, 0);
-MODULE_PARM_DESC(use_thread, "Use the thread interface.");
-
 static bool ssif_tryacpi = true;
 module_param_named(tryacpi, ssif_tryacpi, bool, 0);
 MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the default scan of the interfaces identified via ACPI");
@@ -1405,6 +1400,34 @@ static bool check_acpi(struct ssif_info *ssif_info, struct device *dev)
 	return false;
 }
 
+static int find_slave_address(struct i2c_client *client, int slave_addr)
+{
+	struct ssif_addr_info *info;
+
+	if (slave_addr)
+		return slave_addr;
+
+	/*
+	 * Came in without a slave address, search around to see if
+	 * the other sources have a slave address.  This lets us pick
+	 * up an SMBIOS slave address when using ACPI.
+	 */
+	list_for_each_entry(info, &ssif_infos, link) {
+		if (info->binfo.addr != client->addr)
+			continue;
+		if (info->adapter_name && client->adapter->name &&
+		    strcmp_nospace(info->adapter_name,
+				   client->adapter->name))
+			continue;
+		if (info->slave_addr) {
+			slave_addr = info->slave_addr;
+			break;
+		}
+	}
+
+	return slave_addr;
+}
+
 /*
  * Global enables we care about.
  */
@@ -1447,6 +1470,8 @@ static int ssif_probe(struct i2c_client *client, const struct i2c_device_id *id)
 		}
 	}
 
+	slave_addr = find_slave_address(client, slave_addr);
+
 	pr_info(PFX "Trying %s-specified SSIF interface at i2c address 0x%x, adapter %s, slave address 0x%x\n",
 	       ipmi_addr_src_to_str(ssif_info->addr_source),
 	       client->addr, client->adapter->name, slave_addr);
@@ -1935,7 +1960,7 @@ static int decode_dmi(const struct dmi_device *dmi_dev)
 		slave_addr = data[6];
 	}
 
-	return new_ssif_client(myaddr, NULL, 0, 0, SI_SMBIOS);
+	return new_ssif_client(myaddr, NULL, 0, slave_addr, SI_SMBIOS);
 }
 
 static void dmi_iterator(void)