lib80211: consolidate crypt init routines

Signed-off-by: John W. Linville <linville@tuxdriver.com>

5 files changed, 54 insertions, 117 deletions

diff --git a/drivers/net/wireless/hostap/hostap_hw.c b/drivers/net/wireless/hostap/hostap_hw.c
index 066299fc9259..0f27059bbe85 100644
--- a/drivers/net/wireless/hostap/hostap_hw.c
+++ b/drivers/net/wireless/hostap/hostap_hw.c
@@ -2788,46 +2788,6 @@ static void prism2_check_sta_fw_version(local_info_t *local)
 }
 
 
-static void prism2_crypt_deinit_entries(local_info_t *local, int force)
-{
-        struct list_head *ptr, *n;
-        struct lib80211_crypt_data *entry;
-
-        for (ptr = local->crypt_info.crypt_deinit_list.next, n = ptr->next;
-             ptr != &local->crypt_info.crypt_deinit_list;
-             ptr = n, n = ptr->next) {
-                entry = list_entry(ptr, struct lib80211_crypt_data, list);
-
-                if (atomic_read(&entry->refcnt) != 0 && !force)
-                        continue;
-
-                list_del(ptr);
-
-                if (entry->ops)
-                        entry->ops->deinit(entry->priv);
-                kfree(entry);
-        }
-}
-
-
-static void prism2_crypt_deinit_handler(unsigned long data)
-{
-        local_info_t *local = (local_info_t *) data;
-        unsigned long flags;
-
-        spin_lock_irqsave(&local->lock, flags);
-        prism2_crypt_deinit_entries(local, 0);
-        if (!list_empty(&local->crypt_info.crypt_deinit_list)) {
-                printk(KERN_DEBUG "%s: entries remaining in delayed crypt "
-                       "deletion list\n", local->dev->name);
-                local->crypt_info.crypt_deinit_timer.expires = jiffies + HZ;
-                add_timer(&local->crypt_info.crypt_deinit_timer);
-        }
-        spin_unlock_irqrestore(&local->lock, flags);
-
-}
-
-
 static void hostap_passive_scan(unsigned long data)
 {
         local_info_t *local = (local_info_t *) data;
@@ -3252,12 +3212,7 @@ while (0)
         INIT_LIST_HEAD(&local->cmd_queue);
         init_waitqueue_head(&local->hostscan_wq);
 
-        local->crypt_info.name = dev->name;
-        local->crypt_info.lock = &local->lock;
-        INIT_LIST_HEAD(&local->crypt_info.crypt_deinit_list);
-        init_timer(&local->crypt_info.crypt_deinit_timer);
-        local->crypt_info.crypt_deinit_timer.data = (unsigned long) local;
-        local->crypt_info.crypt_deinit_timer.function = prism2_crypt_deinit_handler;
+        lib80211_crypt_info_init(&local->crypt_info, dev->name, &local->lock);
 
         init_timer(&local->passive_scan_timer);
         local->passive_scan_timer.data = (unsigned long) local;
@@ -3358,9 +3313,7 @@ static void prism2_free_local_data(struct net_device *dev)
 
         flush_scheduled_work();
 
-        if (timer_pending(&local->crypt_info.crypt_deinit_timer))
-                del_timer(&local->crypt_info.crypt_deinit_timer);
-        prism2_crypt_deinit_entries(local, 1);
+        lib80211_crypt_info_free(&local->crypt_info);
 
         if (timer_pending(&local->passive_scan_timer))
                 del_timer(&local->passive_scan_timer);
@@ -3377,16 +3330,6 @@ static void prism2_free_local_data(struct net_device *dev)
         if (local->dev_enabled)
                 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
 
-        for (i = 0; i < WEP_KEYS; i++) {
-                struct lib80211_crypt_data *crypt = local->crypt_info.crypt[i];
-                if (crypt) {
-                        if (crypt->ops)
-                                crypt->ops->deinit(crypt->priv);
-                        kfree(crypt);
-                        local->crypt_info.crypt[i] = NULL;
-                }
-        }
-
         if (local->ap != NULL)
                 hostap_free_data(local->ap);
 
diff --git a/drivers/net/wireless/hostap/hostap_ioctl.c b/drivers/net/wireless/hostap/hostap_ioctl.c
index 29aebb679099..c40fdf4c79de 100644
--- a/drivers/net/wireless/hostap/hostap_ioctl.c
+++ b/drivers/net/wireless/hostap/hostap_ioctl.c
@@ -116,32 +116,6 @@ static int prism2_get_name(struct net_device *dev,
 }
 
 
-static void prism2_crypt_delayed_deinit(local_info_t *local,
-                                        struct lib80211_crypt_data **crypt)
-{
-        struct lib80211_crypt_data *tmp;
-        unsigned long flags;
-
-        tmp = *crypt;
-        *crypt = NULL;
-
-        if (tmp == NULL)
-                return;
-
-        /* must not run ops->deinit() while there may be pending encrypt or
-         * decrypt operations. Use a list of delayed deinits to avoid needing
-         * locking. */
-
-        spin_lock_irqsave(&local->lock, flags);
-        list_add(&tmp->list, &local->crypt_info.crypt_deinit_list);
-        if (!timer_pending(&local->crypt_info.crypt_deinit_timer)) {
-                local->crypt_info.crypt_deinit_timer.expires = jiffies + HZ;
-                add_timer(&local->crypt_info.crypt_deinit_timer);
-        }
-        spin_unlock_irqrestore(&local->lock, flags);
-}
-
-
 static int prism2_ioctl_siwencode(struct net_device *dev,
                                   struct iw_request_info *info,
                                   struct iw_point *erq, char *keybuf)
@@ -166,14 +140,14 @@ static int prism2_ioctl_siwencode(struct net_device *dev,
 
         if (erq->flags & IW_ENCODE_DISABLED) {
                 if (*crypt)
-                        prism2_crypt_delayed_deinit(local, crypt);
+                        lib80211_crypt_delayed_deinit(&local->crypt_info, crypt);
                 goto done;
         }
 
         if (*crypt != NULL && (*crypt)->ops != NULL &&
             strcmp((*crypt)->ops->name, "WEP") != 0) {
                 /* changing to use WEP; deinit previously used algorithm */
-                prism2_crypt_delayed_deinit(local, crypt);
+                lib80211_crypt_delayed_deinit(&local->crypt_info, crypt);
         }
 
         if (*crypt == NULL) {
@@ -189,7 +163,7 @@ static int prism2_ioctl_siwencode(struct net_device *dev,
                         request_module("lib80211_crypt_wep");
                         new_crypt->ops = lib80211_get_crypto_ops("WEP");
                 }
-                if (new_crypt->ops)
+                if (new_crypt->ops && try_module_get(new_crypt->ops->owner))
                         new_crypt->priv = new_crypt->ops->init(i);
                 if (!new_crypt->ops || !new_crypt->priv) {
                         kfree(new_crypt);
@@ -3269,7 +3243,7 @@ static int prism2_ioctl_siwencodeext(struct net_device *dev,
         if ((erq->flags & IW_ENCODE_DISABLED) ||
             ext->alg == IW_ENCODE_ALG_NONE) {
                 if (*crypt)
-                        prism2_crypt_delayed_deinit(local, crypt);
+                        lib80211_crypt_delayed_deinit(&local->crypt_info, crypt);
                 goto done;
         }
 
@@ -3317,7 +3291,7 @@ static int prism2_ioctl_siwencodeext(struct net_device *dev,
         if (*crypt == NULL || (*crypt)->ops != ops) {
                 struct lib80211_crypt_data *new_crypt;
 
-                prism2_crypt_delayed_deinit(local, crypt);
+                lib80211_crypt_delayed_deinit(&local->crypt_info, crypt);
 
                 new_crypt = kzalloc(sizeof(struct lib80211_crypt_data),
                                 GFP_KERNEL);
@@ -3326,7 +3300,8 @@ static int prism2_ioctl_siwencodeext(struct net_device *dev,
                         goto done;
                 }
                 new_crypt->ops = ops;
-                new_crypt->priv = new_crypt->ops->init(i);
+                if (new_crypt->ops && try_module_get(new_crypt->ops->owner))
+                        new_crypt->priv = new_crypt->ops->init(i);
                 if (new_crypt->priv == NULL) {
                         kfree(new_crypt);
                         ret = -EINVAL;
@@ -3503,7 +3478,7 @@ static int prism2_ioctl_set_encryption(local_info_t *local,
 
         if (strcmp(param->u.crypt.alg, "none") == 0) {
                 if (crypt)
-                        prism2_crypt_delayed_deinit(local, crypt);
+                        lib80211_crypt_delayed_deinit(&local->crypt_info, crypt);
                 goto done;
         }
 
@@ -3533,7 +3508,7 @@ static int prism2_ioctl_set_encryption(local_info_t *local,
         if (*crypt == NULL || (*crypt)->ops != ops) {
                 struct lib80211_crypt_data *new_crypt;
 
-                prism2_crypt_delayed_deinit(local, crypt);
+                lib80211_crypt_delayed_deinit(&local->crypt_info, crypt);
 
                 new_crypt = kzalloc(sizeof(struct lib80211_crypt_data),
                                 GFP_KERNEL);
diff --git a/include/net/lib80211.h b/include/net/lib80211.h
index dd1079f98da4..a269b23d1125 100644
--- a/include/net/lib80211.h
+++ b/include/net/lib80211.h
@@ -114,6 +114,9 @@ struct lib80211_crypt_info {
         int crypt_quiesced;
 };
 
+int lib80211_crypt_info_init(struct lib80211_crypt_info *info, char *name,
+                                spinlock_t *lock);
+void lib80211_crypt_info_free(struct lib80211_crypt_info *info);
 int lib80211_register_crypto_ops(struct lib80211_crypto_ops *ops);
 int lib80211_unregister_crypto_ops(struct lib80211_crypto_ops *ops);
 struct lib80211_crypto_ops *lib80211_get_crypto_ops(const char *name);
diff --git a/net/ieee80211/ieee80211_module.c b/net/ieee80211/ieee80211_module.c
index cf21f0bd8569..a2f5616d5b09 100644
--- a/net/ieee80211/ieee80211_module.c
+++ b/net/ieee80211/ieee80211_module.c
@@ -182,13 +182,7 @@ struct net_device *alloc_ieee80211(int sizeof_priv)
 
         spin_lock_init(&ieee->lock);
 
-        ieee->crypt_info.name = dev->name;
-        ieee->crypt_info.lock = &ieee->lock;
-        INIT_LIST_HEAD(&ieee->crypt_info.crypt_deinit_list);
-        setup_timer(&ieee->crypt_info.crypt_deinit_timer,
-                        lib80211_crypt_deinit_handler,
-                        (unsigned long)&ieee->crypt_info);
-        ieee->crypt_info.crypt_quiesced = 0;
+        lib80211_crypt_info_init(&ieee->crypt_info, dev->name, &ieee->lock);
 
         ieee->wpa_enabled = 0;
         ieee->drop_unencrypted = 0;
@@ -206,23 +200,7 @@ void free_ieee80211(struct net_device *dev)
 {
         struct ieee80211_device *ieee = netdev_priv(dev);
 
-        int i;
-
-        lib80211_crypt_quiescing(&ieee->crypt_info);
-        del_timer_sync(&ieee->crypt_info.crypt_deinit_timer);
-        lib80211_crypt_deinit_entries(&ieee->crypt_info, 1);
-
-        for (i = 0; i < WEP_KEYS; i++) {
-                struct lib80211_crypt_data *crypt = ieee->crypt_info.crypt[i];
-                if (crypt) {
-                        if (crypt->ops) {
-                                crypt->ops->deinit(crypt->priv);
-                                module_put(crypt->ops->owner);
-                        }
-                        kfree(crypt);
-                        ieee->crypt_info.crypt[i] = NULL;
-                }
-        }
+        lib80211_crypt_info_free(&ieee->crypt_info);
 
         ieee80211_networks_free(ieee);
         free_netdev(dev);
diff --git a/net/wireless/lib80211.c b/net/wireless/lib80211.c
index d681721f4acb..97d411f74507 100644
--- a/net/wireless/lib80211.c
+++ b/net/wireless/lib80211.c
@@ -71,6 +71,44 @@ const char *print_ssid(char *buf, const char *ssid, u8 ssid_len)
 }
 EXPORT_SYMBOL(print_ssid);
 
+int lib80211_crypt_info_init(struct lib80211_crypt_info *info, char *name,
+                                spinlock_t *lock)
+{
+        memset(info, 0, sizeof(*info));
+
+        info->name = name;
+        info->lock = lock;
+
+        INIT_LIST_HEAD(&info->crypt_deinit_list);
+        setup_timer(&info->crypt_deinit_timer, lib80211_crypt_deinit_handler,
+                        (unsigned long)info);
+
+        return 0;
+}
+EXPORT_SYMBOL(lib80211_crypt_info_init);
+
+void lib80211_crypt_info_free(struct lib80211_crypt_info *info)
+{
+        int i;
+
+        lib80211_crypt_quiescing(info);
+        del_timer_sync(&info->crypt_deinit_timer);
+        lib80211_crypt_deinit_entries(info, 1);
+
+        for (i = 0; i < NUM_WEP_KEYS; i++) {
+                struct lib80211_crypt_data *crypt = info->crypt[i];
+                if (crypt) {
+                        if (crypt->ops) {
+                                crypt->ops->deinit(crypt->priv);
+                                module_put(crypt->ops->owner);
+                        }
+                        kfree(crypt);
+                        info->crypt[i] = NULL;
+                }
+        }
+}
+EXPORT_SYMBOL(lib80211_crypt_info_free);
+
 void lib80211_crypt_deinit_entries(struct lib80211_crypt_info *info, int force)
 {
         struct lib80211_crypt_data *entry, *next;