iwlwifi: check status before send command

Check the status before sending host command, if any of the condition
match, cancel the host command before queue

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl-trans-pcie-tx.c

@@ -1001,6 +1001,20 @@ static int iwl_send_cmd_sync(struct iwl_trans *trans, struct iwl_host_cmd *cmd)
 	IWL_DEBUG_INFO(trans, "Attempting to send sync command %s\n",
 			get_cmd_string(cmd->id));
 
+	if (test_bit(STATUS_EXIT_PENDING, &trans->shrd->status))
+		return -EBUSY;
+
+
+	if (test_bit(STATUS_RF_KILL_HW, &trans->shrd->status)) {
+		IWL_ERR(trans, "Command %s aborted: RF KILL Switch\n",
+			       get_cmd_string(cmd->id));
+		return -ECANCELED;
+	}
+	if (test_bit(STATUS_FW_ERROR, &trans->shrd->status)) {
+		IWL_ERR(trans, "Command %s failed: FW Error\n",
+			       get_cmd_string(cmd->id));
+		return -EIO;
+	}
 	set_bit(STATUS_HCMD_ACTIVE, &trans->shrd->status);
 	IWL_DEBUG_INFO(trans, "Setting HCMD_ACTIVE for command %s\n",
 			get_cmd_string(cmd->id));
@@ -1041,18 +1055,6 @@ static int iwl_send_cmd_sync(struct iwl_trans *trans, struct iwl_host_cmd *cmd)
 		}
 	}
 
-	if (test_bit(STATUS_RF_KILL_HW, &trans->shrd->status)) {
-		IWL_ERR(trans, "Command %s aborted: RF KILL Switch\n",
-			       get_cmd_string(cmd->id));
-		ret = -ECANCELED;
-		goto fail;
-	}
-	if (test_bit(STATUS_FW_ERROR, &trans->shrd->status)) {
-		IWL_ERR(trans, "Command %s failed: FW Error\n",
-			       get_cmd_string(cmd->id));
-		ret = -EIO;
-		goto fail;
-	}
 	if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_page) {
 		IWL_ERR(trans, "Error: Response NULL in '%s'\n",
 			  get_cmd_string(cmd->id));