iwlwifi: fix key removal

commit 5dcbf480473f6c3f06ad2426b7517038a2a18911 upstream.

When trying to remove a key, we always send key
flags just setting the key type, not including
the multicast flag and the key ID. As a result,
whenever any key was removed, the unicast key 0
would be removed, causing a complete connection
loss after the second rekey (the first doesn't
cause a key removal). Fix the key removal code
to include the key ID and multicast flag, thus
removing the correct key.

Reported-by: Alexander Schnaidt <alex.schnaidt@googlemail.com>
Tested-by: Alexander Schnaidt <alex.schnaidt@googlemail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-sta.c b/drivers/net/wireless/iwlwifi/iwl-agn-sta.c
index 4b2aa1d..5cfb3d1 100644 (file)
--- a/drivers/net/wireless/iwlwifi/iwl-agn-sta.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-sta.c
@@ -1211,6 +1211,7 @@ int iwl_remove_dynamic_key(struct iwl_priv *priv,
        unsigned long flags;
        struct iwl_addsta_cmd sta_cmd;
        u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
+       __le16 key_flags;
 
        /* if station isn't there, neither is the key */
        if (sta_id == IWL_INVALID_STATION)
@@ -1236,7 +1237,14 @@ int iwl_remove_dynamic_key(struct iwl_priv *priv,
                IWL_ERR(priv, "offset %d not used in uCode key table.\n",
                        keyconf->hw_key_idx);
 
-       sta_cmd.key.key_flags = STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
+       key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
+       key_flags |= STA_KEY_FLG_MAP_KEY_MSK | STA_KEY_FLG_NO_ENC |
+                    STA_KEY_FLG_INVALID;
+
+       if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
+               key_flags |= STA_KEY_MULTICAST_MSK;
+
+       sta_cmd.key.key_flags = key_flags;
        sta_cmd.key.key_offset = WEP_INVALID_OFFSET;
        sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
        sta_cmd.mode = STA_CONTROL_MODIFY_MSK;