iwlwifi: check for STATUS_EXIT_PENDING when send RXON command

If driver is on the way down, there is no need to send
RXON to uCode, check the condition before continuous the process.
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>

drivers/net/wireless/iwlwifi/iwl-3945.c

@@ -1784,6 +1784,9 @@ int iwl3945_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 	int rc = 0;
 	bool new_assoc = !!(staging_rxon->filter_flags & RXON_FILTER_ASSOC_MSK);
 
+	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
+		return -EINVAL;
+
 	if (!iwl_is_alive(priv))
 		return -1;
 

drivers/net/wireless/iwlwifi/iwl-agn-rxon.c

@@ -130,6 +130,9 @@ int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 
 	lockdep_assert_held(&priv->mutex);
 
+	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
+		return -EINVAL;
+
 	if (!iwl_is_alive(priv))
 		return -EBUSY;