diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-fw-file.h b/drivers/net/wireless/intel/iwlwifi/iwl-fw-file.h
index eb18de800c2c44a0cb2562c03bb701b414b15e31..d56b3d8a31f6aa8c414366010c9f472fef88a788 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-fw-file.h
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-fw-file.h
@@ -328,6 +328,9 @@ typedef unsigned int __bitwise__ iwl_ucode_tlv_capa_t;
  * @IWL_UCODE_TLV_CAPA_EXTEND_SHARED_MEM_CFG: support getting more shared
  *	memory addresses from the firmware.
  * @IWL_UCODE_TLV_CAPA_LQM_SUPPORT: supports Link Quality Measurement
+ * @IWL_UCODE_TLV_CAPA_TX_POWER_ACK: reduced TX power API has larger
+ *	command size (command version 4) that supports toggling ACK TX
+ *	power reduction.
  *
  * @NUM_IWL_UCODE_TLV_CAPA: number of bits used
  */
@@ -368,6 +371,7 @@ enum iwl_ucode_tlv_capa {
 	IWL_UCODE_TLV_CAPA_USNIFFER_UNIFIED		= (__force iwl_ucode_tlv_capa_t)77,
 	IWL_UCODE_TLV_CAPA_EXTEND_SHARED_MEM_CFG	= (__force iwl_ucode_tlv_capa_t)80,
 	IWL_UCODE_TLV_CAPA_LQM_SUPPORT			= (__force iwl_ucode_tlv_capa_t)81,
+	IWL_UCODE_TLV_CAPA_TX_POWER_ACK			= (__force iwl_ucode_tlv_capa_t)84,
 
 	NUM_IWL_UCODE_TLV_CAPA
 #ifdef __CHECKER__
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/fw-api-power.h b/drivers/net/wireless/intel/iwlwifi/mvm/fw-api-power.h
index 65a7c8a4cacf8f4640350ecfaa0b31d52f7fb11b..404b0de9e2dcbcaeca4f65a6533ca3de63006961 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/fw-api-power.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw-api-power.h
@@ -7,7 +7,7 @@
  *
  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
- * Copyright(c) 2015 Intel Deutschland GmbH
+ * Copyright(c) 2015 - 2016 Intel Deutschland GmbH
  *
  * 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
@@ -34,7 +34,7 @@
  *
  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
- * Copyright(c) 2015 Intel Deutschland GmbH
+ * Copyright(c) 2015 - 2016 Intel Deutschland GmbH
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -310,7 +310,8 @@ enum iwl_dev_tx_power_cmd_mode {
 	IWL_TX_POWER_MODE_SET_MAC = 0,
 	IWL_TX_POWER_MODE_SET_DEVICE = 1,
 	IWL_TX_POWER_MODE_SET_CHAINS = 2,
-}; /* TX_POWER_REDUCED_FLAGS_TYPE_API_E_VER_2 */;
+	IWL_TX_POWER_MODE_SET_ACK = 3,
+}; /* TX_POWER_REDUCED_FLAGS_TYPE_API_E_VER_4 */;
 
 /**
  * struct iwl_dev_tx_power_cmd_v2 - TX power reduction command
@@ -338,7 +339,7 @@ struct iwl_dev_tx_power_cmd_v2 {
  * @v2: version 2 of the command, embedded here for easier software handling
  * @per_chain_restriction: per chain restrictions
  */
-struct iwl_dev_tx_power_cmd {
+struct iwl_dev_tx_power_cmd_v3 {
 	/* v3 is just an extension of v2 - keep this here */
 	struct iwl_dev_tx_power_cmd_v2 v2;
 	__le16 per_chain_restriction[IWL_NUM_CHAIN_LIMITS][IWL_NUM_SUB_BANDS];
@@ -346,6 +347,19 @@ struct iwl_dev_tx_power_cmd {
 
 #define IWL_DEV_MAX_TX_POWER 0x7FFF
 
+/**
+ * struct iwl_dev_tx_power_cmd - TX power reduction command
+ * @v3: version 3 of the command, embedded here for easier software handling
+ * @enable_ack_reduction: enable or disable close range ack TX power
+ *	reduction.
+ */
+struct iwl_dev_tx_power_cmd {
+	/* v4 is just an extension of v3 - keep this here */
+	struct iwl_dev_tx_power_cmd_v3 v3;
+	u8 enable_ack_reduction;
+	u8 reserved[3];
+} __packed; /* TX_REDUCED_POWER_API_S_VER_4 */
+
 /**
  * struct iwl_beacon_filter_cmd
  * REPLY_BEACON_FILTERING_CMD = 0xd2 (command)
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
index 4c16fa79b462ab73819a93db9826bebf57fca1bf..7e0cdbf8bf74526ee607a6e0b1a0e77fb5f7e1dc 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
@@ -1027,9 +1027,10 @@ static int iwl_mvm_sar_init(struct iwl_mvm *mvm)
 {
 	struct iwl_mvm_sar_table sar_table;
 	struct iwl_dev_tx_power_cmd cmd = {
-		.v2.set_mode = cpu_to_le32(IWL_TX_POWER_MODE_SET_CHAINS),
+		.v3.v2.set_mode = cpu_to_le32(IWL_TX_POWER_MODE_SET_CHAINS),
 	};
 	int ret, i, j, idx;
+	int len = sizeof(cmd);
 
 	/* we can't do anything with the table if the FW doesn't support it */
 	if (!fw_has_api(&mvm->fw->ucode_capa,
@@ -1039,6 +1040,9 @@ static int iwl_mvm_sar_init(struct iwl_mvm *mvm)
 		return 0;
 	}
 
+	if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TX_POWER_ACK))
+		len = sizeof(cmd.v3);
+
 	ret = iwl_mvm_sar_get_table(mvm, &sar_table);
 	if (ret < 0) {
 		IWL_DEBUG_RADIO(mvm,
@@ -1060,15 +1064,14 @@ static int iwl_mvm_sar_init(struct iwl_mvm *mvm)
 		IWL_DEBUG_RADIO(mvm, "  Chain[%d]:\n", i);
 		for (j = 0; j < IWL_NUM_SUB_BANDS; j++) {
 			idx = (i * IWL_NUM_SUB_BANDS) + j;
-			cmd.per_chain_restriction[i][j] =
+			cmd.v3.per_chain_restriction[i][j] =
 				cpu_to_le16(sar_table.values[idx]);
 			IWL_DEBUG_RADIO(mvm, "    Band[%d] = %d * .125dBm\n",
 					j, sar_table.values[idx]);
 		}
 	}
 
-	ret = iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
-				   sizeof(cmd), &cmd);
+	ret = iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0, len, &cmd);
 	if (ret)
 		IWL_ERR(mvm, "failed to set per-chain TX power: %d\n", ret);
 
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index 73e49d3a88144b10a8bcec670f448d5b6aee2ac9..53761c4f7a0fc3ab06b688d8503fc20a32bce812 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -1250,18 +1250,20 @@ static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 				s16 tx_power)
 {
 	struct iwl_dev_tx_power_cmd cmd = {
-		.v2.set_mode = cpu_to_le32(IWL_TX_POWER_MODE_SET_MAC),
-		.v2.mac_context_id =
+		.v3.v2.set_mode = cpu_to_le32(IWL_TX_POWER_MODE_SET_MAC),
+		.v3.v2.mac_context_id =
 			cpu_to_le32(iwl_mvm_vif_from_mac80211(vif)->id),
-		.v2.pwr_restriction = cpu_to_le16(8 * tx_power),
+		.v3.v2.pwr_restriction = cpu_to_le16(8 * tx_power),
 	};
 	int len = sizeof(cmd);
 
 	if (tx_power == IWL_DEFAULT_MAX_TX_POWER)
-		cmd.v2.pwr_restriction = cpu_to_le16(IWL_DEV_MAX_TX_POWER);
+		cmd.v3.v2.pwr_restriction = cpu_to_le16(IWL_DEV_MAX_TX_POWER);
 
+	if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TX_POWER_ACK))
+		len = sizeof(cmd.v3);
 	if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_TX_POWER_CHAIN))
-		len = sizeof(cmd.v2);
+		len = sizeof(cmd.v3.v2);
 
 	return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0, len, &cmd);
 }