mwifiex: do not re-associate when already connected

In managed mode if the driver is getting a re-associate command
from cfg80211, driver deauthenticates with the AP internally and
sends a disconnected event to cfg80211 before completion of its
association process. The disconnected event then modifies the
SSID length as wdev->ssid_len = 0. So, upon receiving the connect
result event from driver, cfg80211 is unable to get that BSS from
the device's BSS list and generates the following WARN_ON message.

WARNING: CPU: 0 PID: 857 at net/wireless/sme.c:658
         __cfg80211_connect_result+0x3a6/0x3e0 [cfg80211]()

Avoid re-association while the device is already associated to a
network. Also remove the internal deauthentication from the
association path.

Signed-off-by: Ujjal Roy <royujjal@gmail.com>
Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/mwifiex/cfg80211.c b/drivers/net/wireless/mwifiex/cfg80211.c
index 6af135f..a738cc9 100644 (file)
--- a/drivers/net/wireless/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/mwifiex/cfg80211.c
@@ -1604,9 +1604,6 @@ mwifiex_cfg80211_assoc(struct mwifiex_private *priv, size_t ssid_len,
                return -EINVAL;
        }
 
-       /* disconnect before try to associate */
-       mwifiex_deauthenticate(priv, NULL);
-
        /* As this is new association, clear locally stored
         * keys and security related flags */
        priv->sec_info.wpa_enabled = false;
@@ -1744,6 +1741,11 @@ mwifiex_cfg80211_connect(struct wiphy *wiphy, struct net_device *dev,
                return -EINVAL;
        }
 
+       if (priv->wdev && priv->wdev->current_bss) {
+               wiphy_warn(wiphy, "%s: already connected\n", dev->name);
+               return -EALREADY;
+       }
+
        wiphy_dbg(wiphy, "info: Trying to associate to %s and bssid %pM\n",
                  (char *) sme->ssid, sme->bssid);
 

diff --git a/drivers/net/wireless/mwifiex/sta_ioctl.c b/drivers/net/wireless/mwifiex/sta_ioctl.c
index 1a03d4d..caae973 100644 (file)
--- a/drivers/net/wireless/mwifiex/sta_ioctl.c
+++ b/drivers/net/wireless/mwifiex/sta_ioctl.c
@@ -283,10 +283,6 @@ int mwifiex_bss_start(struct mwifiex_private *priv, struct cfg80211_bss *bss,
            priv->bss_mode == NL80211_IFTYPE_P2P_CLIENT) {
                u8 config_bands;
 
-               ret = mwifiex_deauthenticate(priv, NULL);
-               if (ret)
-                       goto done;
-
                if (!bss_desc)
                        return -1;
 
@@ -345,12 +341,6 @@ int mwifiex_bss_start(struct mwifiex_private *priv, struct cfg80211_bss *bss,
                        goto done;
                }
 
-               /* Exit Adhoc mode first */
-               dev_dbg(adapter->dev, "info: Sending Adhoc Stop\n");
-               ret = mwifiex_deauthenticate(priv, NULL);
-               if (ret)
-                       goto done;
-
                priv->adhoc_is_link_sensed = false;
 
                ret = mwifiex_check_network_compatibility(priv, bss_desc);