iwlwifi: adjust TSF in IBSS

This patch makes the driver, in IBSS mode, comply with TSF requirements
in 2 ways:
1. It notifies mac80211 of its TSF timestamp.
2. It uses the given timestamp in the beacon template to update the ucode.

Signed-off-by: Assaf Krauss <assaf.krauss@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl4965-base.c b/drivers/net/wireless/iwlwifi/iwl4965-base.c
index 1b2d9f12a3a1..d1bf599e483f 100644
--- a/drivers/net/wireless/iwlwifi/iwl4965-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl4965-base.c
@@ -3492,6 +3492,7 @@ static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *sk
 {
         struct iwl_priv *priv = hw->priv;
         unsigned long flags;
+        __le64 timestamp;
 
         mutex_lock(&priv->mutex);
         IWL_DEBUG_MAC80211("enter\n");
@@ -3516,6 +3517,8 @@ static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *sk
         priv->ibss_beacon = skb;
 
         priv->assoc_id = 0;
+        timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
+        priv->timestamp = le64_to_cpu(timestamp) +  (priv->beacon_int * 1000);
 
         IWL_DEBUG_MAC80211("leave\n");
         spin_unlock_irqrestore(&priv->lock, flags);