[PATCH] ieee80211: Fixed a kernel oops on module unload

tree 367069f24fc38b4aa910e86ff40094d2078d8aa7
parent a33a1982012e9070736e3717231714dc9892303b
author James Ketrenos <jketreno@linux.intel.com> 1124430800 -0500
committer James Ketrenos <jketreno@linux.intel.com> 1127310571 -0500

Fixed a kernel oops on module unload by adding spin lock protection to
ieee80211's crypt handlers (thanks to Zhu Yi)

Modified scan result logic to report WPA and RSN IEs if set (vs.being
based on wpa_enabled)

Added ieee80211_device as the first parameter to the crypt init()
method.  TKIP modified to use that structure for determining whether to
countermeasures are active.

Signed-off-by: James Ketrenos <jketreno@linux.intel.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

1 files changed, 5 insertions, 4 deletions

diff --git a/net/ieee80211/ieee80211_crypt.c b/net/ieee80211/ieee80211_crypt.c
index dc835f68edd3..0c366299db0f 100644
--- a/net/ieee80211/ieee80211_crypt.c
+++ b/net/ieee80211/ieee80211_crypt.c
@@ -41,7 +41,9 @@ void ieee80211_crypt_deinit_entries(struct ieee80211_device *ieee, int force)
 {
         struct list_head *ptr, *n;
         struct ieee80211_crypt_data *entry;
+        unsigned long flags;
 
+        spin_lock_irqsave(&ieee->lock, flags);
         for (ptr = ieee->crypt_deinit_list.next, n = ptr->next;
              ptr != &ieee->crypt_deinit_list; ptr = n, n = ptr->next) {
                 entry = list_entry(ptr, struct ieee80211_crypt_data, list);
@@ -57,14 +59,13 @@ void ieee80211_crypt_deinit_entries(struct ieee80211_device *ieee, int force)
                 }
                 kfree(entry);
         }
+        spin_unlock_irqrestore(&ieee->lock, flags);
 }
 
 void ieee80211_crypt_deinit_handler(unsigned long data)
 {
         struct ieee80211_device *ieee = (struct ieee80211_device *)data;
-        unsigned long flags;
 
-        spin_lock_irqsave(&ieee->lock, flags);
         ieee80211_crypt_deinit_entries(ieee, 0);
         if (!list_empty(&ieee->crypt_deinit_list)) {
                 printk(KERN_DEBUG "%s: entries remaining in delayed crypt "
@@ -72,7 +73,6 @@ void ieee80211_crypt_deinit_handler(unsigned long data)
                 ieee->crypt_deinit_timer.expires = jiffies + HZ;
                 add_timer(&ieee->crypt_deinit_timer);
         }
-        spin_unlock_irqrestore(&ieee->lock, flags);
 
 }
 
@@ -182,7 +182,8 @@ struct ieee80211_crypto_ops *ieee80211_get_crypto_ops(const char *name)
                 return NULL;
 }
 
-static void *ieee80211_crypt_null_init(int keyidx)
+static void *ieee80211_crypt_null_init(struct ieee80211_device *ieee,
+                                       int keyidx)
 {
         return (void *)1;
 }