iwmc3200wifi: add disconnect work

When the driver receives "connection terminated" event from device,
it could be caused by 2 reasons: the firmware is roaming or the
connection is lost (AP disappears). For the former, an association
complete event is supposed to come within 3 seconds. For the latter,
the driver won't receive any event except the connection terminated.
So we kick a delayed work (5*HZ) when we receive the connection
terminated event. It will be canceled if it turns out to be a roaming
event later. Otherwise we notify SME and userspace the disconnection.

Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 49 insertions, 5 deletions

diff --git a/drivers/net/wireless/iwmc3200wifi/iwm.h b/drivers/net/wireless/iwmc3200wifi/iwm.h
index f054cc828d8..da49df6f402 100644
--- a/drivers/net/wireless/iwmc3200wifi/iwm.h
+++ b/drivers/net/wireless/iwmc3200wifi/iwm.h
@@ -273,6 +273,7 @@ struct iwm_priv {
 
         struct iw_statistics wstats;
         struct delayed_work stats_request;
+        struct delayed_work disconnect;
 
         struct iwm_debugfs dbg;
 
diff --git a/drivers/net/wireless/iwmc3200wifi/main.c b/drivers/net/wireless/iwmc3200wifi/main.c
index cf2574442b5..c41fa8c5fa1 100644
--- a/drivers/net/wireless/iwmc3200wifi/main.c
+++ b/drivers/net/wireless/iwmc3200wifi/main.c
@@ -108,6 +108,26 @@ static void iwm_statistics_request(struct work_struct *work)
         iwm_send_umac_stats_req(iwm, 0);
 }
 
+static void iwm_disconnect_work(struct work_struct *work)
+{
+        struct iwm_priv *iwm =
+                container_of(work, struct iwm_priv, disconnect.work);
+
+        if (iwm->umac_profile_active)
+                iwm_invalidate_mlme_profile(iwm);
+
+        clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
+        iwm->umac_profile_active = 0;
+        memset(iwm->bssid, 0, ETH_ALEN);
+        iwm->channel = 0;
+
+        iwm_link_off(iwm);
+
+        wake_up_interruptible(&iwm->mlme_queue);
+
+        cfg80211_disconnected(iwm_to_ndev(iwm), 0, NULL, 0, GFP_KERNEL);
+}
+
 int __iwm_up(struct iwm_priv *iwm);
 int __iwm_down(struct iwm_priv *iwm);
 
@@ -198,6 +218,7 @@ int iwm_priv_init(struct iwm_priv *iwm)
         spin_lock_init(&iwm->cmd_lock);
         iwm->scan_id = 1;
         INIT_DELAYED_WORK(&iwm->stats_request, iwm_statistics_request);
+        INIT_DELAYED_WORK(&iwm->disconnect, iwm_disconnect_work);
         INIT_WORK(&iwm->reset_worker, iwm_reset_worker);
         INIT_LIST_HEAD(&iwm->bss_list);
 
diff --git a/drivers/net/wireless/iwmc3200wifi/rx.c b/drivers/net/wireless/iwmc3200wifi/rx.c
index 9e6f2cd38d6..4d9793e6865 100644
--- a/drivers/net/wireless/iwmc3200wifi/rx.c
+++ b/drivers/net/wireless/iwmc3200wifi/rx.c
@@ -514,6 +514,7 @@ static int iwm_mlme_assoc_complete(struct iwm_priv *iwm, u8 *buf,
                 /* Internal roaming state, avoid notifying SME. */
                 if (!test_and_clear_bit(IWM_STATUS_SME_CONNECTING, &iwm->status)
                     && iwm->conf.mode == UMAC_MODE_BSS) {
+                        cancel_delayed_work(&iwm->disconnect);
                         cfg80211_roamed(iwm_to_ndev(iwm),
                                         complete->bssid,
                                         iwm->req_ie, iwm->req_ie_len,
@@ -540,8 +541,10 @@ static int iwm_mlme_assoc_complete(struct iwm_priv *iwm, u8 *buf,
 
                 /* Internal roaming state, avoid notifying SME. */
                 if (!test_and_clear_bit(IWM_STATUS_SME_CONNECTING, &iwm->status)
-                    && iwm->conf.mode == UMAC_MODE_BSS)
+                    && iwm->conf.mode == UMAC_MODE_BSS) {
+                        cancel_delayed_work(&iwm->disconnect);
                         break;
+                }
 
                 iwm_link_off(iwm);
 
@@ -569,11 +572,18 @@ static int iwm_mlme_profile_invalidate(struct iwm_priv *iwm, u8 *buf,
                                        struct iwm_wifi_cmd *cmd)
 {
         struct iwm_umac_notif_profile_invalidate *invalid;
+        u32 reason;
 
         invalid = (struct iwm_umac_notif_profile_invalidate *)buf;
+        reason = le32_to_cpu(invalid->reason);
+
+        IWM_DBG_MLME(iwm, INFO, "Profile Invalidated. Reason: %d\n", reason);
 
-        IWM_DBG_MLME(iwm, INFO, "Profile Invalidated. Reason: %d\n",
-                     le32_to_cpu(invalid->reason));
+        if (reason != UMAC_PROFILE_INVALID_REQUEST &&
+            test_bit(IWM_STATUS_SME_CONNECTING, &iwm->status))
+                cfg80211_connect_result(iwm_to_ndev(iwm), NULL, NULL, 0, NULL,
+                                        0, WLAN_STATUS_UNSPECIFIED_FAILURE,
+                                        GFP_KERNEL);
 
         clear_bit(IWM_STATUS_SME_CONNECTING, &iwm->status);
         clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
@@ -589,6 +599,19 @@ static int iwm_mlme_profile_invalidate(struct iwm_priv *iwm, u8 *buf,
         return 0;
 }
 
+#define IWM_DISCONNECT_INTERVAL (5 * HZ)
+
+static int iwm_mlme_connection_terminated(struct iwm_priv *iwm, u8 *buf,
+                                          unsigned long buf_size,
+                                          struct iwm_wifi_cmd *cmd)
+{
+        IWM_DBG_MLME(iwm, DBG, "Connection terminated\n");
+
+        schedule_delayed_work(&iwm->disconnect, IWM_DISCONNECT_INTERVAL);
+
+        return 0;
+}
+
 static int iwm_mlme_scan_complete(struct iwm_priv *iwm, u8 *buf,
                                   unsigned long buf_size,
                                   struct iwm_wifi_cmd *cmd)
@@ -848,8 +871,7 @@ static int iwm_ntf_mlme(struct iwm_priv *iwm, u8 *buf,
         case WIFI_IF_NTFY_PROFILE_INVALIDATE_COMPLETE:
                 return iwm_mlme_profile_invalidate(iwm, buf, buf_size, cmd);
         case WIFI_IF_NTFY_CONNECTION_TERMINATED:
-                IWM_DBG_MLME(iwm, DBG, "Connection terminated\n");
-                break;
+                return iwm_mlme_connection_terminated(iwm, buf, buf_size, cmd);
         case WIFI_IF_NTFY_SCAN_COMPLETE:
                 return iwm_mlme_scan_complete(iwm, buf, buf_size, cmd);
         case WIFI_IF_NTFY_STA_TABLE_CHANGE: