2 files changed, 23 insertions, 6 deletions

diff --git a/net/ieee80211/Kconfig b/net/ieee80211/Kconfig
index dbb08528ddf5..f7e84e9d13ad 100644
--- a/net/ieee80211/Kconfig
+++ b/net/ieee80211/Kconfig
@@ -58,6 +58,7 @@ config IEEE80211_CRYPT_TKIP
         depends on IEEE80211 && NET_RADIO
         select CRYPTO
         select CRYPTO_MICHAEL_MIC
+        select CRC32
         ---help---
         Include software based cipher suites in support of IEEE 802.11i
         (aka TGi, WPA, WPA2, WPA-PSK, etc.) for use with TKIP enabled
diff --git a/net/ieee80211/softmac/ieee80211softmac_auth.c b/net/ieee80211/softmac/ieee80211softmac_auth.c
index ebc33ca6e692..4cef39e171d0 100644
--- a/net/ieee80211/softmac/ieee80211softmac_auth.c
+++ b/net/ieee80211/softmac/ieee80211softmac_auth.c
@@ -116,6 +116,16 @@ ieee80211softmac_auth_queue(void *data)
         kfree(auth);
 }
 
+/* Sends a response to an auth challenge (for shared key auth). */
+static void
+ieee80211softmac_auth_challenge_response(void *_aq)
+{
+        struct ieee80211softmac_auth_queue_item *aq = _aq;
+
+        /* Send our response */
+        ieee80211softmac_send_mgt_frame(aq->mac, aq->net, IEEE80211_STYPE_AUTH, aq->state);
+}
+
 /* Handle the auth response from the AP
  * This should be registered with ieee80211 as handle_auth 
  */
@@ -197,24 +207,30 @@ ieee80211softmac_auth_resp(struct net_device *dev, struct ieee80211_auth *auth)
                 case IEEE80211SOFTMAC_AUTH_SHARED_CHALLENGE:
                         /* Check to make sure we have a challenge IE */
                         data = (u8 *)auth->info_element;
-                        if(*data++ != MFIE_TYPE_CHALLENGE){
+                        if (*data++ != MFIE_TYPE_CHALLENGE) {
                                 printkl(KERN_NOTICE PFX "Shared Key Authentication failed due to a missing challenge.\n");
                                 break;  
                         }
                         /* Save the challenge */
                         spin_lock_irqsave(&mac->lock, flags);
                         net->challenge_len = *data++;   
-                        if(net->challenge_len > WLAN_AUTH_CHALLENGE_LEN)
+                        if (net->challenge_len > WLAN_AUTH_CHALLENGE_LEN)
                                 net->challenge_len = WLAN_AUTH_CHALLENGE_LEN;
-                        if(net->challenge != NULL)
+                        if (net->challenge != NULL)
                                 kfree(net->challenge);
                         net->challenge = kmalloc(net->challenge_len, GFP_ATOMIC);
                         memcpy(net->challenge, data, net->challenge_len);
                         aq->state = IEEE80211SOFTMAC_AUTH_SHARED_RESPONSE; 
-                        spin_unlock_irqrestore(&mac->lock, flags);
 
-                        /* Send our response */
-                        ieee80211softmac_send_mgt_frame(mac, aq->net, IEEE80211_STYPE_AUTH, aq->state);
+                        /* We reuse the work struct from the auth request here.
+                         * It is safe to do so as each one is per-request, and
+                         * at this point (dealing with authentication response)
+                         * we have obviously already sent the initial auth
+                         * request. */
+                        cancel_delayed_work(&aq->work);
+                        INIT_WORK(&aq->work, &ieee80211softmac_auth_challenge_response, (void *)aq);
+                        schedule_work(&aq->work);
+                        spin_unlock_irqrestore(&mac->lock, flags);
                         return 0;
                 case IEEE80211SOFTMAC_AUTH_SHARED_PASS:
                         kfree(net->challenge);