IPMI: fix hotmod remove lock

The removal of proc entries was done holding a lock, which is no longer
allowed.  There is no need for the lock, only a mutex is required, so switch
over to a mutex.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c
index 46d14ac162123b387337a8b015f334195a21fe37..5dc1265ce1d5b288c7049c9ecb305e72d223f618 100644 (file)
--- a/drivers/char/ipmi/ipmi_msghandler.c
+++ b/drivers/char/ipmi/ipmi_msghandler.c
@@ -221,10 +221,8 @@ struct ipmi_smi
        void                     *send_info;
 
 #ifdef CONFIG_PROC_FS
-       /* A list of proc entries for this interface.  This does not
-          need a lock, only one thread creates it and only one thread
-          destroys it. */
-       spinlock_t             proc_entry_lock;
+       /* A list of proc entries for this interface. */
+       struct mutex           proc_entry_lock;
        struct ipmi_proc_entry *proc_entries;
 #endif
 
@@ -1891,11 +1889,11 @@ int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name,
                file->write_proc = write_proc;
                file->owner = owner;
 
-               spin_lock(&smi->proc_entry_lock);
+               mutex_lock(&smi->proc_entry_lock);
                /* Stick it on the list. */
                entry->next = smi->proc_entries;
                smi->proc_entries = entry;
-               spin_unlock(&smi->proc_entry_lock);
+               mutex_unlock(&smi->proc_entry_lock);
        }
 #endif /* CONFIG_PROC_FS */
 
@@ -1939,7 +1937,7 @@ static void remove_proc_entries(ipmi_smi_t smi)
 #ifdef CONFIG_PROC_FS
        struct ipmi_proc_entry *entry;
 
-       spin_lock(&smi->proc_entry_lock);
+       mutex_lock(&smi->proc_entry_lock);
        while (smi->proc_entries) {
                entry = smi->proc_entries;
                smi->proc_entries = entry->next;
@@ -1948,7 +1946,7 @@ static void remove_proc_entries(ipmi_smi_t smi)
                kfree(entry->name);
                kfree(entry);
        }
-       spin_unlock(&smi->proc_entry_lock);
+       mutex_unlock(&smi->proc_entry_lock);
        remove_proc_entry(smi->proc_dir_name, proc_ipmi_root);
 #endif /* CONFIG_PROC_FS */
 }
@@ -2679,7 +2677,7 @@ int ipmi_register_smi(struct ipmi_smi_handlers *handlers,
        }
        intf->curr_seq = 0;
 #ifdef CONFIG_PROC_FS
-       spin_lock_init(&intf->proc_entry_lock);
+       mutex_init(&intf->proc_entry_lock);
 #endif
        spin_lock_init(&intf->waiting_msgs_lock);
        INIT_LIST_HEAD(&intf->waiting_msgs);