[PATCH] IPMI: convert from semaphores to mutexes

[net-next-2.6.git] / drivers / char / ipmi / ipmi_msghandler.c

diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c
index c0c862cce1c3d9da009804184f9583c6d41afdd0..0ded046d5aa80011e5e267a0d1b8ca72fec69475 100644 (file)
--- a/drivers/char/ipmi/ipmi_msghandler.c
+++ b/drivers/char/ipmi/ipmi_msghandler.c
@@ -38,6 +38,7 @@
 #include <linux/sched.h>
 #include <linux/poll.h>
 #include <linux/spinlock.h>
+#include <linux/mutex.h>
 #include <linux/slab.h>
 #include <linux/ipmi.h>
 #include <linux/ipmi_smi.h>
@@ -234,7 +235,7 @@ struct ipmi_smi
 
        /* The list of command receivers that are registered for commands
           on this interface. */
-       struct semaphore cmd_rcvrs_lock;
+       struct mutex     cmd_rcvrs_mutex;
        struct list_head cmd_rcvrs;
 
        /* Events that were queues because no one was there to receive
@@ -387,10 +388,10 @@ static void clean_up_interface_data(ipmi_smi_t intf)
 
        /* Wholesale remove all the entries from the list in the
         * interface and wait for RCU to know that none are in use. */
-       down(&intf->cmd_rcvrs_lock);
+       mutex_lock(&intf->cmd_rcvrs_mutex);
        list_add_rcu(&list, &intf->cmd_rcvrs);
        list_del_rcu(&intf->cmd_rcvrs);
-       up(&intf->cmd_rcvrs_lock);
+       mutex_unlock(&intf->cmd_rcvrs_mutex);
        synchronize_rcu();
 
        list_for_each_entry_safe(rcvr, rcvr2, &list, link)
@@ -846,7 +847,7 @@ int ipmi_destroy_user(ipmi_user_t user)
         * since other things may be using it till we do
         * synchronize_rcu()) then free everything in that list.
         */
-       down(&intf->cmd_rcvrs_lock);
+       mutex_lock(&intf->cmd_rcvrs_mutex);
        list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) {
                if (rcvr->user == user) {
                        list_del_rcu(&rcvr->link);
@@ -854,7 +855,7 @@ int ipmi_destroy_user(ipmi_user_t user)
                        rcvrs = rcvr;
                }
        }
-       up(&intf->cmd_rcvrs_lock);
+       mutex_unlock(&intf->cmd_rcvrs_mutex);
        synchronize_rcu();
        while (rcvrs) {
                rcvr = rcvrs;
@@ -984,7 +985,7 @@ int ipmi_register_for_cmd(ipmi_user_t   user,
        rcvr->netfn = netfn;
        rcvr->user = user;
 
-       down(&intf->cmd_rcvrs_lock);
+       mutex_lock(&intf->cmd_rcvrs_mutex);
        /* Make sure the command/netfn is not already registered. */
        entry = find_cmd_rcvr(intf, netfn, cmd);
        if (entry) {
@@ -995,7 +996,7 @@ int ipmi_register_for_cmd(ipmi_user_t   user,
        list_add_rcu(&rcvr->link, &intf->cmd_rcvrs);
 
  out_unlock:
-       up(&intf->cmd_rcvrs_lock);
+       mutex_unlock(&intf->cmd_rcvrs_mutex);
        if (rv)
                kfree(rcvr);
 
@@ -1009,17 +1010,17 @@ int ipmi_unregister_for_cmd(ipmi_user_t   user,
        ipmi_smi_t      intf = user->intf;
        struct cmd_rcvr *rcvr;
 
-       down(&intf->cmd_rcvrs_lock);
+       mutex_lock(&intf->cmd_rcvrs_mutex);
        /* Make sure the command/netfn is not already registered. */
        rcvr = find_cmd_rcvr(intf, netfn, cmd);
        if ((rcvr) && (rcvr->user == user)) {
                list_del_rcu(&rcvr->link);
-               up(&intf->cmd_rcvrs_lock);
+               mutex_unlock(&intf->cmd_rcvrs_mutex);
                synchronize_rcu();
                kfree(rcvr);
                return 0;
        } else {
-               up(&intf->cmd_rcvrs_lock);
+               mutex_unlock(&intf->cmd_rcvrs_mutex);
                return -ENOENT;
        }
 }
@@ -2365,7 +2366,7 @@ int ipmi_register_smi(struct ipmi_smi_handlers *handlers,
        spin_lock_init(&intf->events_lock);
        INIT_LIST_HEAD(&intf->waiting_events);
        intf->waiting_events_count = 0;
-       init_MUTEX(&intf->cmd_rcvrs_lock);
+       mutex_init(&intf->cmd_rcvrs_mutex);
        INIT_LIST_HEAD(&intf->cmd_rcvrs);
        init_waitqueue_head(&intf->waitq);