[PATCH 0/7] ipmi: a bunch of small fixes

[PATCH 0/7] ipmi: a bunch of small fixes

[minyard]

Things collected since last kernel release.

Some of these are pretty important.  The first three are bug fixes.  The
next three are to hopefully make everyone happy about allowing ACPI to
be on all the time and not have IPMI have an effect on the system when
not in use.  The last is a little cleanup.

-corey

[PATCH 1/7] Char: ipmi_bt_sm, fix infinite loop

[minyard]

From: Jiri Slaby <jslaby@suse.cz>

In read_all_bytes, we do
  unsigned char i;
...
  bt->read_data[0] = BMC2HOST;
  bt->read_count = bt->read_data[0];
...
  for (i = 1; i <= bt->read_count; i++)
    bt->read_data[i] = BMC2HOST;

If bt->read_data[0] == bt->read_count == 255, we loop infinitely in
the 'for' loop. Make 'i' an 'int' instead of 'char' to get rid of the
overflow and finish the loop after 255 iterations every time.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Reported-and-debugged-by: Rui Hui Dian <rhdian@novell.com>
Cc: Tomas Cech <tcech@suse.cz>
Cc: Corey Minyard <minyard@acm.org>
Cc: <openipmi-developer@lists.sourceforge.net>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
---
 drivers/char/ipmi/ipmi_bt_sm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/char/ipmi/ipmi_bt_sm.c b/drivers/char/ipmi/ipmi_bt_sm.c
index f5e4cd7..61e7161 100644
--- a/drivers/char/ipmi/ipmi_bt_sm.c
+++ b/drivers/char/ipmi/ipmi_bt_sm.c
@@ -352,7 +352,7 @@ static inline void write_all_bytes(struct si_sm_data *bt)
 
 static inline int read_all_bytes(struct si_sm_data *bt)
 {
-	unsigned char i;
+	unsigned int i;
 
 	/*
 	 * length is "framing info", minimum = 4: NetFn, Seq, Cmd, cCode.
-- 
1.8.3.1

[PATCH 2/7] ipmi: Fix a race restarting the timer

[minyard]

From: Bodo Stroesser <bstroesser@ts.fujitsu.com>

With recent changes it is possible for the timer handler to detect
an idle interface and not start the timer, but the thread to start
an operation at the same time.  The thread will not start the timer
in that instance, resulting in the timer not running.

Instead, move all timer operations under the lock and start the timer
in the thread if it detect non-idle and the timer is not already
running.  Moving under locks allows the last timeout to be set in
both the thread and the timer. 'Timer is not running' means that the
timer is not pending and smi_timeout() is not running. So we need
a flag to detect this correctly.

Also fix a few other timeout bugs: setting the last timeout when the
interrupt has to be disabled and the timer started, and setting
the last timeout in check_start_timer_thread possibly racing with
the timer

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Bodo Stroesser <bstroesser@ts.fujitsu.com>
---
 drivers/char/ipmi/ipmi_si_intf.c | 46 ++++++++++++++++++++++++----------------
 1 file changed, 28 insertions(+), 18 deletions(-)

diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index b7efd3c..9c40691 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -248,6 +248,9 @@ struct smi_info {
 	/* The timer for this si. */
 	struct timer_list   si_timer;
 
+	/* This flag is set, if the timer is running (timer_pending() isn't enough) */
+	bool		    timer_running;
+
 	/* The time (in jiffies) the last timeout occurred at. */
 	unsigned long       last_timeout_jiffies;
 
@@ -434,6 +437,13 @@ static void start_clear_flags(struct smi_info *smi_info)
 	smi_info->si_state = SI_CLEARING_FLAGS;
 }
 
+static void smi_mod_timer(struct smi_info *smi_info, unsigned long new_val)
+{
+	smi_info->last_timeout_jiffies = jiffies;
+	mod_timer(&smi_info->si_timer, new_val);
+	smi_info->timer_running = true;
+}
+
 /*
  * When we have a situtaion where we run out of memory and cannot
  * allocate messages, we just leave them in the BMC and run the system
@@ -446,8 +456,7 @@ static inline void disable_si_irq(struct smi_info *smi_info)
 		start_disable_irq(smi_info);
 		smi_info->interrupt_disabled = 1;
 		if (!atomic_read(&smi_info->stop_operation))
-			mod_timer(&smi_info->si_timer,
-				  jiffies + SI_TIMEOUT_JIFFIES);
+			smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES);
 	}
 }
 
@@ -907,15 +916,7 @@ static void sender(void                *send_info,
 		list_add_tail(&msg->link, &smi_info->xmit_msgs);
 
 	if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) {
-		/*
-		 * last_timeout_jiffies is updated here to avoid
-		 * smi_timeout() handler passing very large time_diff
-		 * value to smi_event_handler() that causes
-		 * the send command to abort.
-		 */
-		smi_info->last_timeout_jiffies = jiffies;
-
-		mod_timer(&smi_info->si_timer, jiffies + SI_TIMEOUT_JIFFIES);
+		smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES);
 
 		if (smi_info->thread)
 			wake_up_process(smi_info->thread);
@@ -1004,6 +1005,17 @@ static int ipmi_thread(void *data)
 
 		spin_lock_irqsave(&(smi_info->si_lock), flags);
 		smi_result = smi_event_handler(smi_info, 0);
+
+		/*
+		 * If the driver is doing something, there is a possible
+		 * race with the timer.  If the timer handler see idle,
+		 * and the thread here sees something else, the timer
+		 * handler won't restart the timer even though it is
+		 * required.  So start it here if necessary.
+		 */
+		if (smi_result != SI_SM_IDLE && !smi_info->timer_running)
+			smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES);
+
 		spin_unlock_irqrestore(&(smi_info->si_lock), flags);
 		busy_wait = ipmi_thread_busy_wait(smi_result, smi_info,
 						  &busy_until);
@@ -1073,10 +1085,6 @@ static void smi_timeout(unsigned long data)
 		     * SI_USEC_PER_JIFFY);
 	smi_result = smi_event_handler(smi_info, time_diff);
 
-	spin_unlock_irqrestore(&(smi_info->si_lock), flags);
-
-	smi_info->last_timeout_jiffies = jiffies_now;
-
 	if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
 		/* Running with interrupts, only do long timeouts. */
 		timeout = jiffies + SI_TIMEOUT_JIFFIES;
@@ -1098,7 +1106,10 @@ static void smi_timeout(unsigned long data)
 
  do_mod_timer:
 	if (smi_result != SI_SM_IDLE)
-		mod_timer(&(smi_info->si_timer), timeout);
+		smi_mod_timer(smi_info, timeout);
+	else
+		smi_info->timer_running = false;
+	spin_unlock_irqrestore(&(smi_info->si_lock), flags);
 }
 
 static irqreturn_t si_irq_handler(int irq, void *data)
@@ -1146,8 +1157,7 @@ static int smi_start_processing(void       *send_info,
 
 	/* Set up the timer that drives the interface. */
 	setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi);
-	new_smi->last_timeout_jiffies = jiffies;
-	mod_timer(&new_smi->si_timer, jiffies + SI_TIMEOUT_JIFFIES);
+	smi_mod_timer(new_smi, jiffies + SI_TIMEOUT_JIFFIES);
 
 	/*
 	 * Check if the user forcefully enabled the daemon.
-- 
1.8.3.1

[PATCH 3/7] ipmi: Reset the KCS timeout when starting error recovery

[minyard]

From: Corey Minyard <cminyard@mvista.com>

The OBF timer in KCS was not reset in one situation when error
recovery was started, resulting in an immediate timeout.

Reported-by: Bodo Stroesser <bstroesser@ts.fujitsu.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
---
 drivers/char/ipmi/ipmi_kcs_sm.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/char/ipmi/ipmi_kcs_sm.c b/drivers/char/ipmi/ipmi_kcs_sm.c
index 6a4bdc1..8c25f59 100644
--- a/drivers/char/ipmi/ipmi_kcs_sm.c
+++ b/drivers/char/ipmi/ipmi_kcs_sm.c
@@ -251,8 +251,9 @@ static inline int check_obf(struct si_sm_data *kcs, unsigned char status,
 	if (!GET_STATUS_OBF(status)) {
 		kcs->obf_timeout -= time;
 		if (kcs->obf_timeout < 0) {
-		    start_error_recovery(kcs, "OBF not ready in time");
-		    return 1;
+			kcs->obf_timeout = OBF_RETRY_TIMEOUT;
+			start_error_recovery(kcs, "OBF not ready in time");
+			return 1;
 		}
 		return 0;
 	}
-- 
1.8.3.1

[PATCH 4/7] ipmi: Turn off default probing of interfaces

[minyard]

From: Corey Minyard <cminyard@mvista.com>

The default probing can cause problems with some system, slow booting,
extra CPU usages, etc.  Turn it off by default and give a config option
to enable it.

From: Matthew Garrett <matthew.garrett@nebula.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
---
 drivers/char/ipmi/Kconfig        | 12 ++++++++++++
 drivers/char/ipmi/ipmi_si_intf.c |  2 +-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/char/ipmi/Kconfig b/drivers/char/ipmi/Kconfig
index 0baa8fa..db1c9b7 100644
--- a/drivers/char/ipmi/Kconfig
+++ b/drivers/char/ipmi/Kconfig
@@ -50,6 +50,18 @@ config IPMI_SI
 	 Currently, only KCS and SMIC are supported.  If
 	 you are using IPMI, you should probably say "y" here.
 
+config IPMI_SI_PROBE_DEFAULTS
+       bool 'Probe for all possible IPMI system interfaces by default'
+       default n
+       depends on IPMI_SI
+       help
+	 Modern systems will usually expose IPMI interfaces via a discoverable
+	 firmware mechanism such as ACPI or DMI. Older systems do not, and so
+	 the driver is forced to probe hardware manually. This may cause boot
+	 delays. Say "n" here to disable this manual probing. IPMI will then
+	 only be available on older systems if the "ipmi_si_intf.trydefaults=1"
+	 boot argument is passed.
+
 config IPMI_WATCHDOG
        tristate 'IPMI Watchdog Timer'
        help
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index 9c40691..25a1436 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -1239,7 +1239,7 @@ static bool          si_tryplatform = 1;
 #ifdef CONFIG_PCI
 static bool          si_trypci = 1;
 #endif
-static bool          si_trydefaults = 1;
+static bool          si_trydefaults = IS_ENABLED(CONFIG_IPMI_SI_PROBE_DEFAULTS);
 static char          *si_type[SI_MAX_PARMS];
 #define MAX_SI_TYPE_STR 30
 static char          si_type_str[MAX_SI_TYPE_STR];
-- 
1.8.3.1

[PATCH 5/7] ipmi: Turn off all activity on an idle ipmi interface

[minyard]

From: Corey Minyard <cminyard@mvista.com>

The IPMI driver would wake up periodically looking for events and
watchdog pretimeouts.  If there is nothing waiting for these events,
it's really kind of pointless to be checking for them.  So modify
the driver so the message handler can pass down if it needs the
lower layer to be waiting for these.  Modify the system interface
lower layer to turn off all timer and thread activity if the upper
layer doesn't need anything and it is not currently handling messages.
And modify the message handler to not restart the timer if its timer
is not needed.

The timers and kthread will still be enabled if:
* The SI interface is handling a message.
* A user has enabled watching for events.
* The IPMI watchdog timer is in use (since it uses pretimeouts).
* The message handler is waiting on a remote response.
* A user has registered to receive commands.

This mostly affects interfaces without interrupts.  Interfaces
with interrupts already don't use CPU in the system interface
when the interface is idle.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
---
 drivers/char/ipmi/ipmi_msghandler.c | 219 ++++++++++++++++++++++--------------
 drivers/char/ipmi/ipmi_si_intf.c    |  51 +++++++--
 include/linux/ipmi.h                |   2 +-
 include/linux/ipmi_smi.h            |   7 ++
 4 files changed, 182 insertions(+), 97 deletions(-)

diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c
index ec4e10f..872c4ec 100644
--- a/drivers/char/ipmi/ipmi_msghandler.c
+++ b/drivers/char/ipmi/ipmi_msghandler.c
@@ -55,6 +55,7 @@ static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void);
 static int ipmi_init_msghandler(void);
 static void smi_recv_tasklet(unsigned long);
 static void handle_new_recv_msgs(ipmi_smi_t intf);
+static void need_waiter(ipmi_smi_t intf);
 
 static int initialized;
 
@@ -73,6 +74,20 @@ static struct proc_dir_entry *proc_ipmi_root;
  */
 #define MAX_MSG_TIMEOUT		60000
 
+/* Call every ~1000 ms. */
+#define IPMI_TIMEOUT_TIME	1000
+
+/* How many jiffies does it take to get to the timeout time. */
+#define IPMI_TIMEOUT_JIFFIES	((IPMI_TIMEOUT_TIME * HZ) / 1000)
+
+/*
+ * Request events from the queue every second (this is the number of
+ * IPMI_TIMEOUT_TIMES between event requests).  Hopefully, in the
+ * future, IPMI will add a way to know immediately if an event is in
+ * the queue and this silliness can go away.
+ */
+#define IPMI_REQUEST_EV_TIME	(1000 / (IPMI_TIMEOUT_TIME))
+
 /*
  * The main "user" data structure.
  */
@@ -92,7 +107,7 @@ struct ipmi_user {
 	ipmi_smi_t intf;
 
 	/* Does this interface receive IPMI events? */
-	int gets_events;
+	bool gets_events;
 };
 
 struct cmd_rcvr {
@@ -383,6 +398,9 @@ struct ipmi_smi {
 	unsigned int     waiting_events_count; /* How many events in queue? */
 	char             delivering_events;
 	char             event_msg_printed;
+	atomic_t         event_waiters;
+	unsigned int     ticks_to_req_ev;
+	int              last_needs_timer;
 
 	/*
 	 * The event receiver for my BMC, only really used at panic
@@ -451,7 +469,6 @@ static DEFINE_MUTEX(ipmi_interfaces_mutex);
 static LIST_HEAD(smi_watchers);
 static DEFINE_MUTEX(smi_watchers_mutex);
 
-
 #define ipmi_inc_stat(intf, stat) \
 	atomic_inc(&(intf)->stats[IPMI_STAT_ ## stat])
 #define ipmi_get_stat(intf, stat) \
@@ -772,6 +789,7 @@ static int intf_next_seq(ipmi_smi_t           intf,
 		*seq = i;
 		*seqid = intf->seq_table[i].seqid;
 		intf->curr_seq = (i+1)%IPMI_IPMB_NUM_SEQ;
+		need_waiter(intf);
 	} else {
 		rv = -EAGAIN;
 	}
@@ -941,7 +959,7 @@ int ipmi_create_user(unsigned int          if_num,
 	new_user->handler = handler;
 	new_user->handler_data = handler_data;
 	new_user->intf = intf;
-	new_user->gets_events = 0;
+	new_user->gets_events = false;
 
 	if (!try_module_get(intf->handlers->owner)) {
 		rv = -ENODEV;
@@ -966,6 +984,11 @@ int ipmi_create_user(unsigned int          if_num,
 	spin_lock_irqsave(&intf->seq_lock, flags);
 	list_add_rcu(&new_user->link, &intf->users);
 	spin_unlock_irqrestore(&intf->seq_lock, flags);
+	if (handler->ipmi_watchdog_pretimeout) {
+		/* User wants pretimeouts, so make sure to watch for them. */
+		if (atomic_inc_return(&intf->event_waiters) == 1)
+			need_waiter(intf);
+	}
 	*user = new_user;
 	return 0;
 
@@ -1021,6 +1044,12 @@ int ipmi_destroy_user(ipmi_user_t user)
 
 	user->valid = 0;
 
+	if (user->handler->ipmi_watchdog_pretimeout)
+		atomic_dec(&intf->event_waiters);
+
+	if (user->gets_events)
+		atomic_dec(&intf->event_waiters);
+
 	/* Remove the user from the interface's sequence table. */
 	spin_lock_irqsave(&intf->seq_lock, flags);
 	list_del_rcu(&user->link);
@@ -1184,7 +1213,7 @@ int ipmi_set_maintenance_mode(ipmi_user_t user, int mode)
 }
 EXPORT_SYMBOL(ipmi_set_maintenance_mode);
 
-int ipmi_set_gets_events(ipmi_user_t user, int val)
+int ipmi_set_gets_events(ipmi_user_t user, bool val)
 {
 	unsigned long        flags;
 	ipmi_smi_t           intf = user->intf;
@@ -1194,8 +1223,18 @@ int ipmi_set_gets_events(ipmi_user_t user, int val)
 	INIT_LIST_HEAD(&msgs);
 
 	spin_lock_irqsave(&intf->events_lock, flags);
+	if (user->gets_events == val)
+		goto out;
+
 	user->gets_events = val;
 
+	if (val) {
+		if (atomic_inc_return(&intf->event_waiters) == 1)
+			need_waiter(intf);
+	} else {
+		atomic_dec(&intf->event_waiters);
+	}
+
 	if (intf->delivering_events)
 		/*
 		 * Another thread is delivering events for this, so
@@ -1289,6 +1328,9 @@ int ipmi_register_for_cmd(ipmi_user_t   user,
 		goto out_unlock;
 	}
 
+	if (atomic_inc_return(&intf->event_waiters) == 1)
+		need_waiter(intf);
+
 	list_add_rcu(&rcvr->link, &intf->cmd_rcvrs);
 
  out_unlock:
@@ -1330,6 +1372,7 @@ int ipmi_unregister_for_cmd(ipmi_user_t   user,
 	mutex_unlock(&intf->cmd_rcvrs_mutex);
 	synchronize_rcu();
 	while (rcvrs) {
+		atomic_dec(&intf->event_waiters);
 		rcvr = rcvrs;
 		rcvrs = rcvr->next;
 		kfree(rcvr);
@@ -2876,6 +2919,8 @@ int ipmi_register_smi(struct ipmi_smi_handlers *handlers,
 		     (unsigned long) intf);
 	atomic_set(&intf->watchdog_pretimeouts_to_deliver, 0);
 	spin_lock_init(&intf->events_lock);
+	atomic_set(&intf->event_waiters, 0);
+	intf->ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
 	INIT_LIST_HEAD(&intf->waiting_events);
 	intf->waiting_events_count = 0;
 	mutex_init(&intf->cmd_rcvrs_mutex);
@@ -3965,7 +4010,8 @@ smi_from_recv_msg(ipmi_smi_t intf, struct ipmi_recv_msg *recv_msg,
 
 static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent,
 			      struct list_head *timeouts, long timeout_period,
-			      int slot, unsigned long *flags)
+			      int slot, unsigned long *flags,
+			      unsigned int *waiting_msgs)
 {
 	struct ipmi_recv_msg     *msg;
 	struct ipmi_smi_handlers *handlers;
@@ -3977,8 +4023,10 @@ static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent,
 		return;
 
 	ent->timeout -= timeout_period;
-	if (ent->timeout > 0)
+	if (ent->timeout > 0) {
+		(*waiting_msgs)++;
 		return;
+	}
 
 	if (ent->retries_left == 0) {
 		/* The message has used all its retries. */
@@ -3995,6 +4043,8 @@ static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent,
 		struct ipmi_smi_msg *smi_msg;
 		/* More retries, send again. */
 
+		(*waiting_msgs)++;
+
 		/*
 		 * Start with the max timer, set to normal timer after
 		 * the message is sent.
@@ -4040,117 +4090,118 @@ static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent,
 	}
 }
 
-static void ipmi_timeout_handler(long timeout_period)
+static unsigned int ipmi_timeout_handler(ipmi_smi_t intf, long timeout_period)
 {
-	ipmi_smi_t           intf;
 	struct list_head     timeouts;
 	struct ipmi_recv_msg *msg, *msg2;
 	unsigned long        flags;
 	int                  i;
+	unsigned int         waiting_msgs = 0;
 
-	rcu_read_lock();
-	list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
-		tasklet_schedule(&intf->recv_tasklet);
-
-		/*
-		 * Go through the seq table and find any messages that
-		 * have timed out, putting them in the timeouts
-		 * list.
-		 */
-		INIT_LIST_HEAD(&timeouts);
-		spin_lock_irqsave(&intf->seq_lock, flags);
-		for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++)
-			check_msg_timeout(intf, &(intf->seq_table[i]),
-					  &timeouts, timeout_period, i,
-					  &flags);
-		spin_unlock_irqrestore(&intf->seq_lock, flags);
+	/*
+	 * Go through the seq table and find any messages that
+	 * have timed out, putting them in the timeouts
+	 * list.
+	 */
+	INIT_LIST_HEAD(&timeouts);
+	spin_lock_irqsave(&intf->seq_lock, flags);
+	for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++)
+		check_msg_timeout(intf, &(intf->seq_table[i]),
+				  &timeouts, timeout_period, i,
+				  &flags, &waiting_msgs);
+	spin_unlock_irqrestore(&intf->seq_lock, flags);
 
-		list_for_each_entry_safe(msg, msg2, &timeouts, link)
-			deliver_err_response(msg, IPMI_TIMEOUT_COMPLETION_CODE);
+	list_for_each_entry_safe(msg, msg2, &timeouts, link)
+		deliver_err_response(msg, IPMI_TIMEOUT_COMPLETION_CODE);
 
-		/*
-		 * Maintenance mode handling.  Check the timeout
-		 * optimistically before we claim the lock.  It may
-		 * mean a timeout gets missed occasionally, but that
-		 * only means the timeout gets extended by one period
-		 * in that case.  No big deal, and it avoids the lock
-		 * most of the time.
-		 */
+	/*
+	 * Maintenance mode handling.  Check the timeout
+	 * optimistically before we claim the lock.  It may
+	 * mean a timeout gets missed occasionally, but that
+	 * only means the timeout gets extended by one period
+	 * in that case.  No big deal, and it avoids the lock
+	 * most of the time.
+	 */
+	if (intf->auto_maintenance_timeout > 0) {
+		spin_lock_irqsave(&intf->maintenance_mode_lock, flags);
 		if (intf->auto_maintenance_timeout > 0) {
-			spin_lock_irqsave(&intf->maintenance_mode_lock, flags);
-			if (intf->auto_maintenance_timeout > 0) {
-				intf->auto_maintenance_timeout
-					-= timeout_period;
-				if (!intf->maintenance_mode
-				    && (intf->auto_maintenance_timeout <= 0)) {
-					intf->maintenance_mode_enable = 0;
-					maintenance_mode_update(intf);
-				}
+			intf->auto_maintenance_timeout
+				-= timeout_period;
+			if (!intf->maintenance_mode
+			    && (intf->auto_maintenance_timeout <= 0)) {
+				intf->maintenance_mode_enable = 0;
+				maintenance_mode_update(intf);
 			}
-			spin_unlock_irqrestore(&intf->maintenance_mode_lock,
-					       flags);
 		}
+		spin_unlock_irqrestore(&intf->maintenance_mode_lock,
+				       flags);
 	}
-	rcu_read_unlock();
+
+	tasklet_schedule(&intf->recv_tasklet);
+
+	return waiting_msgs;
 }
 
-static void ipmi_request_event(void)
+static void ipmi_request_event(ipmi_smi_t intf)
 {
-	ipmi_smi_t               intf;
 	struct ipmi_smi_handlers *handlers;
 
-	rcu_read_lock();
-	/*
-	 * Called from the timer, no need to check if handlers is
-	 * valid.
-	 */
-	list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
-		/* No event requests when in maintenance mode. */
-		if (intf->maintenance_mode_enable)
-			continue;
+	/* No event requests when in maintenance mode. */
+	if (intf->maintenance_mode_enable)
+		return;
 
-		handlers = intf->handlers;
-		if (handlers)
-			handlers->request_events(intf->send_info);
-	}
-	rcu_read_unlock();
+	handlers = intf->handlers;
+	if (handlers)
+		handlers->request_events(intf->send_info);
 }
 
 static struct timer_list ipmi_timer;
 
-/* Call every ~1000 ms. */
-#define IPMI_TIMEOUT_TIME	1000
-
-/* How many jiffies does it take to get to the timeout time. */
-#define IPMI_TIMEOUT_JIFFIES	((IPMI_TIMEOUT_TIME * HZ) / 1000)
-
-/*
- * Request events from the queue every second (this is the number of
- * IPMI_TIMEOUT_TIMES between event requests).  Hopefully, in the
- * future, IPMI will add a way to know immediately if an event is in
- * the queue and this silliness can go away.
- */
-#define IPMI_REQUEST_EV_TIME	(1000 / (IPMI_TIMEOUT_TIME))
-
 static atomic_t stop_operation;
-static unsigned int ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
 
 static void ipmi_timeout(unsigned long data)
 {
+	ipmi_smi_t intf;
+	int nt = 0;
+
 	if (atomic_read(&stop_operation))
 		return;
 
-	ticks_to_req_ev--;
-	if (ticks_to_req_ev == 0) {
-		ipmi_request_event();
-		ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
-	}
+	rcu_read_lock();
+	list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
+		int lnt = 0;
+
+		if (atomic_read(&intf->event_waiters)) {
+			intf->ticks_to_req_ev--;
+			if (intf->ticks_to_req_ev == 0) {
+				ipmi_request_event(intf);
+				intf->ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
+			}
+			lnt++;
+		}
 
-	ipmi_timeout_handler(IPMI_TIMEOUT_TIME);
+		lnt += ipmi_timeout_handler(intf, IPMI_TIMEOUT_TIME);
 
-	mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
+		lnt = !!lnt;
+		if (lnt != intf->last_needs_timer &&
+					intf->handlers->set_need_watch)
+			intf->handlers->set_need_watch(intf->send_info, lnt);
+		intf->last_needs_timer = lnt;
+
+		nt += lnt;
+	}
+	rcu_read_unlock();
+
+	if (nt)
+		mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
 }
 
+static void need_waiter(ipmi_smi_t intf)
+{
+	/* Racy, but worst case we start the timer twice. */
+	if (!timer_pending(&ipmi_timer))
+		mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
+}
 
 static atomic_t smi_msg_inuse_count = ATOMIC_INIT(0);
 static atomic_t recv_msg_inuse_count = ATOMIC_INIT(0);
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index 25a1436..444ea54 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -257,6 +257,9 @@ struct smi_info {
 	/* Used to gracefully stop the timer without race conditions. */
 	atomic_t            stop_operation;
 
+	/* Are we waiting for the events, pretimeouts, received msgs? */
+	atomic_t            need_watch;
+
 	/*
 	 * The driver will disable interrupts when it gets into a
 	 * situation where it cannot handle messages due to lack of
@@ -862,6 +865,19 @@ static enum si_sm_result smi_event_handler(struct smi_info *smi_info,
 	return si_sm_result;
 }
 
+static void check_start_timer_thread(struct smi_info *smi_info)
+{
+	if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) {
+		smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES);
+
+		if (smi_info->thread)
+			wake_up_process(smi_info->thread);
+
+		start_next_msg(smi_info);
+		smi_event_handler(smi_info, 0);
+	}
+}
+
 static void sender(void                *send_info,
 		   struct ipmi_smi_msg *msg,
 		   int                 priority)
@@ -915,15 +931,7 @@ static void sender(void                *send_info,
 	else
 		list_add_tail(&msg->link, &smi_info->xmit_msgs);
 
-	if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) {
-		smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES);
-
-		if (smi_info->thread)
-			wake_up_process(smi_info->thread);
-
-		start_next_msg(smi_info);
-		smi_event_handler(smi_info, 0);
-	}
+	check_start_timer_thread(smi_info);
 	spin_unlock_irqrestore(&smi_info->si_lock, flags);
 }
 
@@ -1023,9 +1031,15 @@ static int ipmi_thread(void *data)
 			; /* do nothing */
 		else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait)
 			schedule();
-		else if (smi_result == SI_SM_IDLE)
-			schedule_timeout_interruptible(100);
-		else
+		else if (smi_result == SI_SM_IDLE) {
+			if (atomic_read(&smi_info->need_watch)) {
+				schedule_timeout_interruptible(100);
+			} else {
+				/* Wait to be woken up when we are needed. */
+				__set_current_state(TASK_INTERRUPTIBLE);
+				schedule();
+			}
+		} else
 			schedule_timeout_interruptible(1);
 	}
 	return 0;
@@ -1061,6 +1075,17 @@ static void request_events(void *send_info)
 	atomic_set(&smi_info->req_events, 1);
 }
 
+static void set_need_watch(void *send_info, int enable)
+{
+	struct smi_info *smi_info = send_info;
+	unsigned long flags;
+
+	atomic_set(&smi_info->need_watch, enable);
+	spin_lock_irqsave(&smi_info->si_lock, flags);
+	check_start_timer_thread(smi_info);
+	spin_unlock_irqrestore(&smi_info->si_lock, flags);
+}
+
 static int initialized;
 
 static void smi_timeout(unsigned long data)
@@ -1212,6 +1237,7 @@ static struct ipmi_smi_handlers handlers = {
 	.get_smi_info		= get_smi_info,
 	.sender			= sender,
 	.request_events		= request_events,
+	.set_need_watch		= set_need_watch,
 	.set_maintenance_mode   = set_maintenance_mode,
 	.set_run_to_completion  = set_run_to_completion,
 	.poll			= poll,
@@ -3352,6 +3378,7 @@ static int try_smi_init(struct smi_info *new_smi)
 
 	new_smi->interrupt_disabled = 1;
 	atomic_set(&new_smi->stop_operation, 0);
+	atomic_set(&new_smi->need_watch, 0);
 	new_smi->intf_num = smi_num;
 	smi_num++;
 
diff --git a/include/linux/ipmi.h b/include/linux/ipmi.h
index 1f9f56e..76d2acb 100644
--- a/include/linux/ipmi.h
+++ b/include/linux/ipmi.h
@@ -237,7 +237,7 @@ int ipmi_set_maintenance_mode(ipmi_user_t user, int mode);
  * The first user that sets this to TRUE will receive all events that
  * have been queued while no one was waiting for events.
  */
-int ipmi_set_gets_events(ipmi_user_t user, int val);
+int ipmi_set_gets_events(ipmi_user_t user, bool val);
 
 /*
  * Called when a new SMI is registered.  This will also be called on
diff --git a/include/linux/ipmi_smi.h b/include/linux/ipmi_smi.h
index 8ea3fe0..2a7ff30 100644
--- a/include/linux/ipmi_smi.h
+++ b/include/linux/ipmi_smi.h
@@ -109,6 +109,13 @@ struct ipmi_smi_handlers {
 	   events from the BMC we are attached to. */
 	void (*request_events)(void *send_info);
 
+	/* Called by the upper layer when some user requires that the
+	   interface watch for events, received messages, watchdog
+	   pretimeouts, or not.  Used by the SMI to know if it should
+	   watch for these.  This may be NULL if the SMI does not
+	   implement it. */
+	void (*set_need_watch)(void *send_info, int enable);
+
 	/* Called when the interface should go into "run to
 	   completion" mode.  If this call sets the value to true, the
 	   interface should make sure that all messages are flushed
-- 
1.8.3.1

[PATCH 6/7] Change ACPI IPMI support to "default y"

[minyard]

From: Matthew Garrett <matthew.garrett@nebula.com>

The ACPI IPMI driver implements IPMI operation region support for the ACPI
core. Systems that declare ACPI operation regions may reference them at any
time, including during kernel initialisation. These accesses will fail
unless the ACPI IPMI driver is present, and undesirable system behaviour
may result. Set the default to Y in order to encourage distributions and
users to configure kernels to avoid awkward surprises.

Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
---
 drivers/acpi/Kconfig      | 2 +-
 drivers/char/ipmi/Kconfig | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index ab686b3..072acbc 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -153,7 +153,7 @@ config ACPI_PROCESSOR
 config ACPI_IPMI
 	tristate "IPMI"
 	depends on IPMI_SI
-	default n
+	default y
 	help
 	  This driver enables the ACPI to access the BMC controller. And it
 	  uses the IPMI request/response message to communicate with BMC
diff --git a/drivers/char/ipmi/Kconfig b/drivers/char/ipmi/Kconfig
index db1c9b7..e0d688a 100644
--- a/drivers/char/ipmi/Kconfig
+++ b/drivers/char/ipmi/Kconfig
@@ -5,6 +5,7 @@
 menuconfig IPMI_HANDLER
        tristate 'IPMI top-level message handler'
        depends on HAS_IOMEM
+       default y if ACPI
        help
          This enables the central IPMI message handler, required for IPMI
 	 to work.
@@ -45,6 +46,7 @@ config IPMI_DEVICE_INTERFACE
 
 config IPMI_SI
        tristate 'IPMI System Interface handler'
+       default y if ACPI
        help
          Provides a driver for System Interfaces (KCS, SMIC, BT).
 	 Currently, only KCS and SMIC are supported.  If
-- 
1.8.3.1

[PATCH 7/7] ipmi: boolify some things

[minyard]

From: Corey Minyard <cminyard@mvista.com>

Convert some ints to bools.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
---
 drivers/char/ipmi/ipmi_msghandler.c | 22 ++++++++--------
 drivers/char/ipmi/ipmi_si_intf.c    | 50 ++++++++++++++++++-------------------
 include/linux/ipmi_smi.h            |  6 ++---
 3 files changed, 38 insertions(+), 40 deletions(-)

diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c
index 872c4ec..e6db938 100644
--- a/drivers/char/ipmi/ipmi_msghandler.c
+++ b/drivers/char/ipmi/ipmi_msghandler.c
@@ -94,8 +94,8 @@ static struct proc_dir_entry *proc_ipmi_root;
 struct ipmi_user {
 	struct list_head link;
 
-	/* Set to "0" when the user is destroyed. */
-	int valid;
+	/* Set to false when the user is destroyed. */
+	bool valid;
 
 	struct kref refcount;
 
@@ -413,7 +413,7 @@ struct ipmi_smi {
 
 	/* For handling of maintenance mode. */
 	int maintenance_mode;
-	int maintenance_mode_enable;
+	bool maintenance_mode_enable;
 	int auto_maintenance_timeout;
 	spinlock_t maintenance_mode_lock; /* Used in a timer... */
 
@@ -980,7 +980,7 @@ int ipmi_create_user(unsigned int          if_num,
 	 */
 	mutex_unlock(&ipmi_interfaces_mutex);
 
-	new_user->valid = 1;
+	new_user->valid = true;
 	spin_lock_irqsave(&intf->seq_lock, flags);
 	list_add_rcu(&new_user->link, &intf->users);
 	spin_unlock_irqrestore(&intf->seq_lock, flags);
@@ -1042,7 +1042,7 @@ int ipmi_destroy_user(ipmi_user_t user)
 	struct cmd_rcvr  *rcvr;
 	struct cmd_rcvr  *rcvrs = NULL;
 
-	user->valid = 0;
+	user->valid = false;
 
 	if (user->handler->ipmi_watchdog_pretimeout)
 		atomic_dec(&intf->event_waiters);
@@ -1184,25 +1184,23 @@ int ipmi_set_maintenance_mode(ipmi_user_t user, int mode)
 	if (intf->maintenance_mode != mode) {
 		switch (mode) {
 		case IPMI_MAINTENANCE_MODE_AUTO:
-			intf->maintenance_mode = mode;
 			intf->maintenance_mode_enable
 				= (intf->auto_maintenance_timeout > 0);
 			break;
 
 		case IPMI_MAINTENANCE_MODE_OFF:
-			intf->maintenance_mode = mode;
-			intf->maintenance_mode_enable = 0;
+			intf->maintenance_mode_enable = false;
 			break;
 
 		case IPMI_MAINTENANCE_MODE_ON:
-			intf->maintenance_mode = mode;
-			intf->maintenance_mode_enable = 1;
+			intf->maintenance_mode_enable = true;
 			break;
 
 		default:
 			rv = -EINVAL;
 			goto out_unlock;
 		}
+		intf->maintenance_mode = mode;
 
 		maintenance_mode_update(intf);
 	}
@@ -1578,7 +1576,7 @@ static int i_ipmi_request(ipmi_user_t          user,
 				= IPMI_MAINTENANCE_MODE_TIMEOUT;
 			if (!intf->maintenance_mode
 			    && !intf->maintenance_mode_enable) {
-				intf->maintenance_mode_enable = 1;
+				intf->maintenance_mode_enable = true;
 				maintenance_mode_update(intf);
 			}
 			spin_unlock_irqrestore(&intf->maintenance_mode_lock,
@@ -4129,7 +4127,7 @@ static unsigned int ipmi_timeout_handler(ipmi_smi_t intf, long timeout_period)
 				-= timeout_period;
 			if (!intf->maintenance_mode
 			    && (intf->auto_maintenance_timeout <= 0)) {
-				intf->maintenance_mode_enable = 0;
+				intf->maintenance_mode_enable = false;
 				maintenance_mode_update(intf);
 			}
 		}
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index 444ea54..1c4bb4f 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -217,7 +217,7 @@ struct smi_info {
 	unsigned char       msg_flags;
 
 	/* Does the BMC have an event buffer? */
-	char		    has_event_buffer;
+	bool		    has_event_buffer;
 
 	/*
 	 * If set to true, this will request events the next time the
@@ -230,7 +230,7 @@ struct smi_info {
 	 * call.  Generally used after a panic to make sure stuff goes
 	 * out.
 	 */
-	int                 run_to_completion;
+	bool                run_to_completion;
 
 	/* The I/O port of an SI interface. */
 	int                 port;
@@ -266,7 +266,7 @@ struct smi_info {
 	 * memory.  Once that situation clears up, it will re-enable
 	 * interrupts.
 	 */
-	int interrupt_disabled;
+	bool interrupt_disabled;
 
 	/* From the get device id response... */
 	struct ipmi_device_id device_id;
@@ -279,7 +279,7 @@ struct smi_info {
 	 * True if we allocated the device, false if it came from
 	 * someplace else (like PCI).
 	 */
-	int dev_registered;
+	bool dev_registered;
 
 	/* Slave address, could be reported from DMI. */
 	unsigned char slave_addr;
@@ -303,19 +303,19 @@ struct smi_info {
 static int force_kipmid[SI_MAX_PARMS];
 static int num_force_kipmid;
 #ifdef CONFIG_PCI
-static int pci_registered;
+static bool pci_registered;
 #endif
 #ifdef CONFIG_ACPI
-static int pnp_registered;
+static bool pnp_registered;
 #endif
 #ifdef CONFIG_PARISC
-static int parisc_registered;
+static bool parisc_registered;
 #endif
 
 static unsigned int kipmid_max_busy_us[SI_MAX_PARMS];
 static int num_max_busy_us;
 
-static int unload_when_empty = 1;
+static bool unload_when_empty = true;
 
 static int add_smi(struct smi_info *smi);
 static int try_smi_init(struct smi_info *smi);
@@ -457,7 +457,7 @@ static inline void disable_si_irq(struct smi_info *smi_info)
 {
 	if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
 		start_disable_irq(smi_info);
-		smi_info->interrupt_disabled = 1;
+		smi_info->interrupt_disabled = true;
 		if (!atomic_read(&smi_info->stop_operation))
 			smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES);
 	}
@@ -467,7 +467,7 @@ static inline void enable_si_irq(struct smi_info *smi_info)
 {
 	if ((smi_info->irq) && (smi_info->interrupt_disabled)) {
 		start_enable_irq(smi_info);
-		smi_info->interrupt_disabled = 0;
+		smi_info->interrupt_disabled = false;
 	}
 }
 
@@ -712,7 +712,7 @@ static void handle_transaction_done(struct smi_info *smi_info)
 			dev_warn(smi_info->dev,
 				 "Maybe ok, but ipmi might run very slowly.\n");
 		} else
-			smi_info->interrupt_disabled = 0;
+			smi_info->interrupt_disabled = false;
 		smi_info->si_state = SI_NORMAL;
 		break;
 	}
@@ -935,7 +935,7 @@ static void sender(void                *send_info,
 	spin_unlock_irqrestore(&smi_info->si_lock, flags);
 }
 
-static void set_run_to_completion(void *send_info, int i_run_to_completion)
+static void set_run_to_completion(void *send_info, bool i_run_to_completion)
 {
 	struct smi_info   *smi_info = send_info;
 	enum si_sm_result result;
@@ -1050,7 +1050,7 @@ static void poll(void *send_info)
 {
 	struct smi_info *smi_info = send_info;
 	unsigned long flags = 0;
-	int run_to_completion = smi_info->run_to_completion;
+	bool run_to_completion = smi_info->run_to_completion;
 
 	/*
 	 * Make sure there is some delay in the poll loop so we can
@@ -1075,7 +1075,7 @@ static void request_events(void *send_info)
 	atomic_set(&smi_info->req_events, 1);
 }
 
-static void set_need_watch(void *send_info, int enable)
+static void set_need_watch(void *send_info, bool enable)
 {
 	struct smi_info *smi_info = send_info;
 	unsigned long flags;
@@ -1223,7 +1223,7 @@ static int get_smi_info(void *send_info, struct ipmi_smi_info *data)
 	return 0;
 }
 
-static void set_maintenance_mode(void *send_info, int enable)
+static void set_maintenance_mode(void *send_info, bool enable)
 {
 	struct smi_info   *smi_info = send_info;
 
@@ -1364,7 +1364,7 @@ module_param_array(force_kipmid, int, &num_force_kipmid, 0);
 MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or"
 		 " disabled(0).  Normally the IPMI driver auto-detects"
 		 " this, but the value may be overridden by this parm.");
-module_param(unload_when_empty, int, 0);
+module_param(unload_when_empty, bool, 0);
 MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are"
 		 " specified or found, default is 1.  Setting to 0"
 		 " is useful for hot add of devices using hotmod.");
@@ -3372,11 +3372,11 @@ static int try_smi_init(struct smi_info *new_smi)
 	INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs));
 	new_smi->curr_msg = NULL;
 	atomic_set(&new_smi->req_events, 0);
-	new_smi->run_to_completion = 0;
+	new_smi->run_to_completion = false;
 	for (i = 0; i < SI_NUM_STATS; i++)
 		atomic_set(&new_smi->stats[i], 0);
 
-	new_smi->interrupt_disabled = 1;
+	new_smi->interrupt_disabled = true;
 	atomic_set(&new_smi->stop_operation, 0);
 	atomic_set(&new_smi->need_watch, 0);
 	new_smi->intf_num = smi_num;
@@ -3384,7 +3384,7 @@ static int try_smi_init(struct smi_info *new_smi)
 
 	rv = try_enable_event_buffer(new_smi);
 	if (rv == 0)
-		new_smi->has_event_buffer = 1;
+		new_smi->has_event_buffer = true;
 
 	/*
 	 * Start clearing the flags before we enable interrupts or the
@@ -3418,7 +3418,7 @@ static int try_smi_init(struct smi_info *new_smi)
 			       rv);
 			goto out_err;
 		}
-		new_smi->dev_registered = 1;
+		new_smi->dev_registered = true;
 	}
 
 	rv = ipmi_register_smi(&handlers,
@@ -3467,7 +3467,7 @@ static int try_smi_init(struct smi_info *new_smi)
 	wait_for_timer_and_thread(new_smi);
 
  out_err:
-	new_smi->interrupt_disabled = 1;
+	new_smi->interrupt_disabled = true;
 
 	if (new_smi->intf) {
 		ipmi_unregister_smi(new_smi->intf);
@@ -3503,7 +3503,7 @@ static int try_smi_init(struct smi_info *new_smi)
 
 	if (new_smi->dev_registered) {
 		platform_device_unregister(new_smi->pdev);
-		new_smi->dev_registered = 0;
+		new_smi->dev_registered = false;
 	}
 
 	return rv;
@@ -3558,14 +3558,14 @@ static int init_ipmi_si(void)
 			printk(KERN_ERR PFX "Unable to register "
 			       "PCI driver: %d\n", rv);
 		else
-			pci_registered = 1;
+			pci_registered = true;
 	}
 #endif
 
 #ifdef CONFIG_ACPI
 	if (si_tryacpi) {
 		pnp_register_driver(&ipmi_pnp_driver);
-		pnp_registered = 1;
+		pnp_registered = true;
 	}
 #endif
 
@@ -3581,7 +3581,7 @@ static int init_ipmi_si(void)
 
 #ifdef CONFIG_PARISC
 	register_parisc_driver(&ipmi_parisc_driver);
-	parisc_registered = 1;
+	parisc_registered = true;
 	/* poking PC IO addresses will crash machine, don't do it */
 	si_trydefaults = 0;
 #endif
diff --git a/include/linux/ipmi_smi.h b/include/linux/ipmi_smi.h
index 2a7ff30..bd34924 100644
--- a/include/linux/ipmi_smi.h
+++ b/include/linux/ipmi_smi.h
@@ -114,14 +114,14 @@ struct ipmi_smi_handlers {
 	   pretimeouts, or not.  Used by the SMI to know if it should
 	   watch for these.  This may be NULL if the SMI does not
 	   implement it. */
-	void (*set_need_watch)(void *send_info, int enable);
+	void (*set_need_watch)(void *send_info, bool enable);
 
 	/* Called when the interface should go into "run to
 	   completion" mode.  If this call sets the value to true, the
 	   interface should make sure that all messages are flushed
 	   out and that none are pending, and any new requests are run
 	   to completion immediately. */
-	void (*set_run_to_completion)(void *send_info, int run_to_completion);
+	void (*set_run_to_completion)(void *send_info, bool run_to_completion);
 
 	/* Called to poll for work to do.  This is so upper layers can
 	   poll for operations during things like crash dumps. */
@@ -132,7 +132,7 @@ struct ipmi_smi_handlers {
 	   setting.  The message handler does the mode handling.  Note
 	   that this is called from interrupt context, so it cannot
 	   block. */
-	void (*set_maintenance_mode)(void *send_info, int enable);
+	void (*set_maintenance_mode)(void *send_info, bool enable);
 
 	/* Tell the handler that we are using it/not using it.  The
 	   message handler get the modules that this handler belongs
-- 
1.8.3.1