iwlwifi: remove false rxon if rx chain changes

Rx chain might change during power save transitions but it doesn't
require sending Full-ROXN command to the firmware. Full-RXON requires
reconnection to an AP and thus affects user experience. The patch
avoids the Full-RXON by removing the rx_chain modification check in
iwl_full_rxon_required function.

Signed-off-by: Mohamed Abbas <mohamed.abbas@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>

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index 2afa1fb..a5feb0c 100644 (file)
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -181,14 +181,14 @@ static int iwl4965_check_rxon_cmd(struct iwl_rxon_cmd *rxon)
 }
 
 /**
- * iwl4965_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
+ * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
  * @priv: staging_rxon is compared to active_rxon
  *
  * If the RXON structure is changing enough to require a new tune,
  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
  */
-static int iwl4965_full_rxon_required(struct iwl_priv *priv)
+static int iwl_full_rxon_required(struct iwl_priv *priv)
 {
 
        /* These items are only settable from the full RXON command */
@@ -207,7 +207,6 @@ static int iwl4965_full_rxon_required(struct iwl_priv *priv)
             priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
            (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
             priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
-           (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
            (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
                return 1;
 
@@ -263,7 +262,7 @@ static int iwl4965_commit_rxon(struct iwl_priv *priv)
        /* If we don't need to send a full RXON, we can use
         * iwl4965_rxon_assoc_cmd which is used to reconfigure filter
         * and other flags for the current radio configuration. */
-       if (!iwl4965_full_rxon_required(priv)) {
+       if (!iwl_full_rxon_required(priv)) {
                ret = iwl_send_rxon_assoc(priv);
                if (ret) {
                        IWL_ERROR("Error setting RXON_ASSOC (%d)\n", ret);