iwlwifi: don't WARN when calling iwl_get_shared_mem_conf with RF-Kill

iwl_mvm_send_cmd returns 0 when the command won't be sent
because RF-Kill is asserted. Do the same when we call
iwl_get_shared_mem_conf since it is not sent through
iwl_mvm_send_cmd but directly calls the transport layer.

Cc: stable@vger.kernel.org
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/fw/smem.c

@@ -8,7 +8,7 @@
  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
- * Copyright(c) 2018 Intel Corporation
+ * Copyright(c) 2018 - 2019 Intel Corporation
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
@@ -31,7 +31,7 @@
  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
- * Copyright(c) 2018 Intel Corporation
+ * Copyright(c) 2018 - 2019 Intel Corporation
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -134,6 +134,7 @@ void iwl_get_shared_mem_conf(struct iwl_fw_runtime *fwrt)
 		.len = { 0, },
 	};
 	struct iwl_rx_packet *pkt;
+	int ret;
 
 	if (fw_has_capa(&fwrt->fw->ucode_capa,
 			IWL_UCODE_TLV_CAPA_EXTEND_SHARED_MEM_CFG))
@@ -141,8 +142,13 @@ void iwl_get_shared_mem_conf(struct iwl_fw_runtime *fwrt)
 	else
 		cmd.id = SHARED_MEM_CFG;
 
-	if (WARN_ON(iwl_trans_send_cmd(fwrt->trans, &cmd)))
+	ret = iwl_trans_send_cmd(fwrt->trans, &cmd);
+
+	if (ret) {
+		WARN(ret != -ERFKILL,
+		     "Could not send the SMEM command: %d\n", ret);
 		return;
+	}
 
 	pkt = cmd.resp_pkt;
 	if (fwrt->trans->cfg->device_family >= IWL_DEVICE_FAMILY_22000)