lib80211: consolidate crypt init routines

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

2 files changed, 11 insertions, 93 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);