iwlagn: use changed in mac_config

In function iwl_mac_config use changed flag to call only
the affected functions. This patch also allow user to cache
channel, txpower and power value when the interface is not
ready and apply the changes once the interface ready.

Signed-off-by: Mohamed Abbas <mohamed.abbas@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c
index 085e9cf1cac..bcdecb11080 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.c
+++ b/drivers/net/wireless/iwlwifi/iwl-core.c
@@ -1437,6 +1437,10 @@ int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
 
         priv->tx_power_user_lmt = tx_power;
 
+        /* if nic is not up don't send command */
+        if (!iwl_is_ready_rf(priv))
+                return ret;
+
         if (force && priv->cfg->ops->lib->send_tx_power)
                 ret = priv->cfg->ops->lib->send_tx_power(priv);