mwifiex: remove casts of void pointers

In some cases local pointers are used to cast void pointers passed to
the function. Those unnecessary local pointers are also removed.

This patch was inspired by Joe Perches' patch
[PATCH net-next 1/2] wireless: Remove casts of void *;
and the comments from Julian Calaby.

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Cc: Joe Perches <joe@perches.com>
Cc: Julian Calaby <julian.calaby@gmail.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

13 files changed, 129 insertions, 177 deletions

diff --git a/drivers/net/wireless/mwifiex/11n.c b/drivers/net/wireless/mwifiex/11n.c
index 916183d3900..34bba523429 100644
--- a/drivers/net/wireless/mwifiex/11n.c
+++ b/drivers/net/wireless/mwifiex/11n.c
@@ -185,13 +185,12 @@ int mwifiex_ret_11n_addba_req(struct mwifiex_private *priv,
  *
  * Handling includes changing the header fields into CPU format.
  */
-int mwifiex_ret_11n_cfg(struct host_cmd_ds_command *resp, void *data_buf)
+int mwifiex_ret_11n_cfg(struct host_cmd_ds_command *resp,
+			struct mwifiex_ds_11n_tx_cfg *tx_cfg)
 {
-	struct mwifiex_ds_11n_tx_cfg *tx_cfg;
 	struct host_cmd_ds_11n_cfg *htcfg = &resp->params.htcfg;
 
-	if (data_buf) {
-		tx_cfg = (struct mwifiex_ds_11n_tx_cfg *) data_buf;
+	if (tx_cfg) {
 		tx_cfg->tx_htcap = le16_to_cpu(htcfg->ht_tx_cap);
 		tx_cfg->tx_htinfo = le16_to_cpu(htcfg->ht_tx_info);
 	}
@@ -208,11 +207,10 @@ int mwifiex_ret_11n_cfg(struct host_cmd_ds_command *resp, void *data_buf)
  */
 int mwifiex_cmd_recfg_tx_buf(struct mwifiex_private *priv,
 			     struct host_cmd_ds_command *cmd, int cmd_action,
-			     void *data_buf)
+			     u16 *buf_size)
 {
 	struct host_cmd_ds_txbuf_cfg *tx_buf = &cmd->params.tx_buf;
 	u16 action = (u16) cmd_action;
-	u16 buf_size = *((u16 *) data_buf);
 
 	cmd->command = cpu_to_le16(HostCmd_CMD_RECONFIGURE_TX_BUFF);
 	cmd->size =
@@ -220,8 +218,8 @@ int mwifiex_cmd_recfg_tx_buf(struct mwifiex_private *priv,
 	tx_buf->action = cpu_to_le16(action);
 	switch (action) {
 	case HostCmd_ACT_GEN_SET:
-		dev_dbg(priv->adapter->dev, "cmd: set tx_buf=%d\n", buf_size);
-		tx_buf->buff_size = cpu_to_le16(buf_size);
+		dev_dbg(priv->adapter->dev, "cmd: set tx_buf=%d\n", *buf_size);
+		tx_buf->buff_size = cpu_to_le16(*buf_size);
 		break;
 	case HostCmd_ACT_GEN_GET:
 	default:
@@ -240,13 +238,12 @@ int mwifiex_cmd_recfg_tx_buf(struct mwifiex_private *priv,
  *      - Ensuring correct endian-ness
  */
 int mwifiex_cmd_amsdu_aggr_ctrl(struct host_cmd_ds_command *cmd,
-				int cmd_action, void *data_buf)
+				int cmd_action,
+				struct mwifiex_ds_11n_amsdu_aggr_ctrl *aa_ctrl)
 {
 	struct host_cmd_ds_amsdu_aggr_ctrl *amsdu_ctrl =
 		&cmd->params.amsdu_aggr_ctrl;
 	u16 action = (u16) cmd_action;
-	struct mwifiex_ds_11n_amsdu_aggr_ctrl *aa_ctrl =
-		(struct mwifiex_ds_11n_amsdu_aggr_ctrl *) data_buf;
 
 	cmd->command = cpu_to_le16(HostCmd_CMD_AMSDU_AGGR_CTRL);
 	cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_amsdu_aggr_ctrl)
@@ -272,15 +269,13 @@ int mwifiex_cmd_amsdu_aggr_ctrl(struct host_cmd_ds_command *cmd,
  * Handling includes changing the header fields into CPU format.
  */
 int mwifiex_ret_amsdu_aggr_ctrl(struct host_cmd_ds_command *resp,
-				void *data_buf)
+				struct mwifiex_ds_11n_amsdu_aggr_ctrl
+				*amsdu_aggr_ctrl)
 {
-	struct mwifiex_ds_11n_amsdu_aggr_ctrl *amsdu_aggr_ctrl;
 	struct host_cmd_ds_amsdu_aggr_ctrl *amsdu_ctrl =
 		&resp->params.amsdu_aggr_ctrl;
 
-	if (data_buf) {
-		amsdu_aggr_ctrl =
-			(struct mwifiex_ds_11n_amsdu_aggr_ctrl *) data_buf;
+	if (amsdu_aggr_ctrl) {
 		amsdu_aggr_ctrl->enable = le16_to_cpu(amsdu_ctrl->enable);
 		amsdu_aggr_ctrl->curr_buf_size =
 			le16_to_cpu(amsdu_ctrl->curr_buf_size);
@@ -296,12 +291,10 @@ int mwifiex_ret_amsdu_aggr_ctrl(struct host_cmd_ds_command *resp,
  *      - Setting HT Tx capability and HT Tx information fields
  *      - Ensuring correct endian-ness
  */
-int mwifiex_cmd_11n_cfg(struct host_cmd_ds_command *cmd,
-			u16 cmd_action, void *data_buf)
+int mwifiex_cmd_11n_cfg(struct host_cmd_ds_command *cmd, u16 cmd_action,
+			struct mwifiex_ds_11n_tx_cfg *txcfg)
 {
 	struct host_cmd_ds_11n_cfg *htcfg = &cmd->params.htcfg;
-	struct mwifiex_ds_11n_tx_cfg *txcfg =
-		(struct mwifiex_ds_11n_tx_cfg *) data_buf;
 
 	cmd->command = cpu_to_le16(HostCmd_CMD_11N_CFG);
 	cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_11n_cfg) + S_DS_GEN);
diff --git a/drivers/net/wireless/mwifiex/11n.h b/drivers/net/wireless/mwifiex/11n.h
index a4390a1a2a9..90b421e343d 100644
--- a/drivers/net/wireless/mwifiex/11n.h
+++ b/drivers/net/wireless/mwifiex/11n.h
@@ -29,9 +29,9 @@ int mwifiex_ret_11n_delba(struct mwifiex_private *priv,
 int mwifiex_ret_11n_addba_req(struct mwifiex_private *priv,
 			      struct host_cmd_ds_command *resp);
 int mwifiex_ret_11n_cfg(struct host_cmd_ds_command *resp,
-			void *data_buf);
-int mwifiex_cmd_11n_cfg(struct host_cmd_ds_command *cmd,
-			u16 cmd_action, void *data_buf);
+			struct mwifiex_ds_11n_tx_cfg *tx_cfg);
+int mwifiex_cmd_11n_cfg(struct host_cmd_ds_command *cmd, u16 cmd_action,
+			struct mwifiex_ds_11n_tx_cfg *txcfg);
 
 int mwifiex_cmd_append_11n_tlv(struct mwifiex_private *priv,
 			       struct mwifiex_bssdescriptor *bss_desc,
@@ -62,12 +62,14 @@ int mwifiex_get_rx_reorder_tbl(struct mwifiex_private *priv,
 int mwifiex_get_tx_ba_stream_tbl(struct mwifiex_private *priv,
 			       struct mwifiex_ds_tx_ba_stream_tbl *buf);
 int mwifiex_ret_amsdu_aggr_ctrl(struct host_cmd_ds_command *resp,
-				void *data_buf);
+				struct mwifiex_ds_11n_amsdu_aggr_ctrl
+				*amsdu_aggr_ctrl);
 int mwifiex_cmd_recfg_tx_buf(struct mwifiex_private *priv,
 			     struct host_cmd_ds_command *cmd,
-			     int cmd_action, void *data_buf);
+			     int cmd_action, u16 *buf_size);
 int mwifiex_cmd_amsdu_aggr_ctrl(struct host_cmd_ds_command *cmd,
-				int cmd_action, void *data_buf);
+				int cmd_action,
+				struct mwifiex_ds_11n_amsdu_aggr_ctrl *aa_ctrl);
 
 /*
  * This function checks whether AMPDU is allowed or not for a particular TID.
diff --git a/drivers/net/wireless/mwifiex/11n_rxreorder.c b/drivers/net/wireless/mwifiex/11n_rxreorder.c
index e5dfdc39a92..7aa9aa0ac95 100644
--- a/drivers/net/wireless/mwifiex/11n_rxreorder.c
+++ b/drivers/net/wireless/mwifiex/11n_rxreorder.c
@@ -328,13 +328,12 @@ int mwifiex_cmd_11n_addba_req(struct host_cmd_ds_command *cmd, void *data_buf)
  */
 int mwifiex_cmd_11n_addba_rsp_gen(struct mwifiex_private *priv,
 				  struct host_cmd_ds_command *cmd,
-				  void *data_buf)
+				  struct host_cmd_ds_11n_addba_req
+				  *cmd_addba_req)
 {
 	struct host_cmd_ds_11n_addba_rsp *add_ba_rsp =
 		(struct host_cmd_ds_11n_addba_rsp *)
 		&cmd->params.add_ba_rsp;
-	struct host_cmd_ds_11n_addba_req *cmd_addba_req =
-		(struct host_cmd_ds_11n_addba_req *) data_buf;
 	u8 tid;
 	int win_size;
 	uint16_t block_ack_param_set;
diff --git a/drivers/net/wireless/mwifiex/11n_rxreorder.h b/drivers/net/wireless/mwifiex/11n_rxreorder.h
index f3ca8c8c18f..033c8adbdcd 100644
--- a/drivers/net/wireless/mwifiex/11n_rxreorder.h
+++ b/drivers/net/wireless/mwifiex/11n_rxreorder.h
@@ -52,8 +52,9 @@ int mwifiex_ret_11n_addba_resp(struct mwifiex_private *priv,
 int mwifiex_cmd_11n_delba(struct host_cmd_ds_command *cmd,
 			  void *data_buf);
 int mwifiex_cmd_11n_addba_rsp_gen(struct mwifiex_private *priv,
-				  struct host_cmd_ds_command
-				  *cmd, void *data_buf);
+				  struct host_cmd_ds_command *cmd,
+				  struct host_cmd_ds_11n_addba_req
+				  *cmd_addba_req);
 int mwifiex_cmd_11n_addba_req(struct host_cmd_ds_command *cmd,
 			      void *data_buf);
 void mwifiex_11n_cleanup_reorder_tbl(struct mwifiex_private *priv);
diff --git a/drivers/net/wireless/mwifiex/cmdevt.c b/drivers/net/wireless/mwifiex/cmdevt.c
index cd89fed206a..b5352afb871 100644
--- a/drivers/net/wireless/mwifiex/cmdevt.c
+++ b/drivers/net/wireless/mwifiex/cmdevt.c
@@ -104,13 +104,11 @@ mwifiex_clean_cmd_node(struct mwifiex_adapter *adapter,
  * main thread.
  */
 static int mwifiex_cmd_host_cmd(struct mwifiex_private *priv,
-				struct host_cmd_ds_command *cmd, void *data_buf)
+				struct host_cmd_ds_command *cmd,
+				struct mwifiex_ds_misc_cmd *pcmd_ptr)
 {
-	struct mwifiex_ds_misc_cmd *pcmd_ptr =
-		(struct mwifiex_ds_misc_cmd *) data_buf;
-
 	/* Copy the HOST command to command buffer */
-	memcpy((void *) cmd, pcmd_ptr->cmd, pcmd_ptr->len);
+	memcpy(cmd, pcmd_ptr->cmd, pcmd_ptr->len);
 	dev_dbg(priv->adapter->dev, "cmd: host cmd size = %d\n", pcmd_ptr->len);
 	return 0;
 }
@@ -707,15 +705,14 @@ int mwifiex_process_cmdresp(struct mwifiex_adapter *adapter)
 
 	if (adapter->curr_cmd->cmd_flag & CMD_F_HOSTCMD) {
 		/* Copy original response back to response buffer */
-		struct mwifiex_ds_misc_cmd *hostcmd = NULL;
+		struct mwifiex_ds_misc_cmd *hostcmd;
 		uint16_t size = le16_to_cpu(resp->size);
 		dev_dbg(adapter->dev, "info: host cmd resp size = %d\n", size);
 		size = min_t(u16, size, MWIFIEX_SIZE_OF_CMD_BUFFER);
 		if (adapter->curr_cmd->data_buf) {
-			hostcmd = (struct mwifiex_ds_misc_cmd *)
-						adapter->curr_cmd->data_buf;
+			hostcmd = adapter->curr_cmd->data_buf;
 			hostcmd->len = size;
-			memcpy(hostcmd->cmd, (void *) resp, size);
+			memcpy(hostcmd->cmd, resp, size);
 		}
 	}
 	orig_cmdresp_no = le16_to_cpu(resp->command);
@@ -1155,7 +1152,7 @@ EXPORT_SYMBOL_GPL(mwifiex_process_sleep_confirm_resp);
 int mwifiex_cmd_enh_power_mode(struct mwifiex_private *priv,
 			       struct host_cmd_ds_command *cmd,
 			       u16 cmd_action, uint16_t ps_bitmap,
-			       void *data_buf)
+			       struct mwifiex_ds_auto_ds *auto_ds)
 {
 	struct host_cmd_ds_802_11_ps_mode_enh *psmode_enh =
 		&cmd->params.psmode_enh;
@@ -1218,9 +1215,8 @@ int mwifiex_cmd_enh_power_mode(struct mwifiex_private *priv,
 					sizeof(struct mwifiex_ie_types_header));
 			cmd_size += sizeof(*auto_ds_tlv);
 			tlv += sizeof(*auto_ds_tlv);
-			if (data_buf)
-				idletime = ((struct mwifiex_ds_auto_ds *)
-					     data_buf)->idle_time;
+			if (auto_ds)
+				idletime = auto_ds->idle_time;
 			dev_dbg(priv->adapter->dev,
 					"cmd: PS Command: Enter Auto Deep Sleep\n");
 			auto_ds_tlv->deep_sleep_timeout = cpu_to_le16(idletime);
@@ -1239,7 +1235,7 @@ int mwifiex_cmd_enh_power_mode(struct mwifiex_private *priv,
  */
 int mwifiex_ret_enh_power_mode(struct mwifiex_private *priv,
 			       struct host_cmd_ds_command *resp,
-			       void *data_buf)
+			       struct mwifiex_ds_pm_cfg *pm_cfg)
 {
 	struct mwifiex_adapter *adapter = priv->adapter;
 	struct host_cmd_ds_802_11_ps_mode_enh *ps_mode =
@@ -1282,10 +1278,8 @@ int mwifiex_ret_enh_power_mode(struct mwifiex_private *priv,
 
 		dev_dbg(adapter->dev, "cmd: ps_bitmap=%#x\n", ps_bitmap);
 
-		if (data_buf) {
+		if (pm_cfg) {
 			/* This section is for get power save mode */
-			struct mwifiex_ds_pm_cfg *pm_cfg =
-					(struct mwifiex_ds_pm_cfg *)data_buf;
 			if (ps_bitmap & BITMAP_STA_PS)
 				pm_cfg->param.ps_mode = 1;
 			else
diff --git a/drivers/net/wireless/mwifiex/join.c b/drivers/net/wireless/mwifiex/join.c
index 5eab3dc29b1..644e2e405cb 100644
--- a/drivers/net/wireless/mwifiex/join.c
+++ b/drivers/net/wireless/mwifiex/join.c
@@ -364,10 +364,9 @@ static int mwifiex_append_rsn_ie_wpa_wpa2(struct mwifiex_private *priv,
  */
 int mwifiex_cmd_802_11_associate(struct mwifiex_private *priv,
 				 struct host_cmd_ds_command *cmd,
-				 void *data_buf)
+				 struct mwifiex_bssdescriptor *bss_desc)
 {
 	struct host_cmd_ds_802_11_associate *assoc = &cmd->params.associate;
-	struct mwifiex_bssdescriptor *bss_desc;
 	struct mwifiex_ie_types_ssid_param_set *ssid_tlv;
 	struct mwifiex_ie_types_phy_param_set *phy_tlv;
 	struct mwifiex_ie_types_ss_param_set *ss_tlv;
@@ -380,7 +379,6 @@ int mwifiex_cmd_802_11_associate(struct mwifiex_private *priv,
 	u8 *pos;
 	int rsn_ie_len = 0;
 
-	bss_desc = (struct mwifiex_bssdescriptor *) data_buf;
 	pos = (u8 *) assoc;
 
 	mwifiex_cfg_tx_buf(priv, bss_desc);
@@ -748,7 +746,8 @@ done:
  */
 int
 mwifiex_cmd_802_11_ad_hoc_start(struct mwifiex_private *priv,
-				struct host_cmd_ds_command *cmd, void *data_buf)
+				struct host_cmd_ds_command *cmd,
+				struct mwifiex_802_11_ssid *req_ssid)
 {
 	int rsn_ie_len = 0;
 	struct mwifiex_adapter *adapter = priv->adapter;
@@ -786,20 +785,15 @@ mwifiex_cmd_802_11_ad_hoc_start(struct mwifiex_private *priv,
 
 	memset(adhoc_start->ssid, 0, IEEE80211_MAX_SSID_LEN);
 
-	memcpy(adhoc_start->ssid,
-	       ((struct mwifiex_802_11_ssid *) data_buf)->ssid,
-	       ((struct mwifiex_802_11_ssid *) data_buf)->ssid_len);
+	memcpy(adhoc_start->ssid, req_ssid->ssid, req_ssid->ssid_len);
 
 	dev_dbg(adapter->dev, "info: ADHOC_S_CMD: SSID = %s\n",
 				adhoc_start->ssid);
 
 	memset(bss_desc->ssid.ssid, 0, IEEE80211_MAX_SSID_LEN);
-	memcpy(bss_desc->ssid.ssid,
-	       ((struct mwifiex_802_11_ssid *) data_buf)->ssid,
-	       ((struct mwifiex_802_11_ssid *) data_buf)->ssid_len);
+	memcpy(bss_desc->ssid.ssid, req_ssid->ssid, req_ssid->ssid_len);
 
-	bss_desc->ssid.ssid_len =
-		((struct mwifiex_802_11_ssid *) data_buf)->ssid_len;
+	bss_desc->ssid.ssid_len = req_ssid->ssid_len;
 
 	/* Set the BSS mode */
 	adhoc_start->bss_mode = HostCmd_BSS_MODE_IBSS;
@@ -1036,13 +1030,12 @@ mwifiex_cmd_802_11_ad_hoc_start(struct mwifiex_private *priv,
  */
 int
 mwifiex_cmd_802_11_ad_hoc_join(struct mwifiex_private *priv,
-			       struct host_cmd_ds_command *cmd, void *data_buf)
+			       struct host_cmd_ds_command *cmd,
+			       struct mwifiex_bssdescriptor *bss_desc)
 {
 	int rsn_ie_len = 0;
 	struct host_cmd_ds_802_11_ad_hoc_join *adhoc_join =
 		&cmd->params.adhoc_join;
-	struct mwifiex_bssdescriptor *bss_desc =
-		(struct mwifiex_bssdescriptor *) data_buf;
 	struct mwifiex_ie_types_chan_list_param_set *chan_tlv;
 	u32 cmd_append_size = 0;
 	u16 tmp_cap;
diff --git a/drivers/net/wireless/mwifiex/main.c b/drivers/net/wireless/mwifiex/main.c
index 054a5c348a2..e5fc53dc688 100644
--- a/drivers/net/wireless/mwifiex/main.c
+++ b/drivers/net/wireless/mwifiex/main.c
@@ -553,7 +553,7 @@ static int
 mwifiex_set_mac_address(struct net_device *dev, void *addr)
 {
 	struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
-	struct sockaddr *hw_addr = (struct sockaddr *) addr;
+	struct sockaddr *hw_addr = addr;
 	int ret;
 
 	memcpy(priv->curr_addr, hw_addr->sa_data, ETH_ALEN);
diff --git a/drivers/net/wireless/mwifiex/main.h b/drivers/net/wireless/mwifiex/main.h
index db201cc1473..03691c02a6e 100644
--- a/drivers/net/wireless/mwifiex/main.h
+++ b/drivers/net/wireless/mwifiex/main.h
@@ -736,10 +736,10 @@ void mwifiex_process_sleep_confirm_resp(struct mwifiex_adapter *, u8 *,
 int mwifiex_cmd_enh_power_mode(struct mwifiex_private *priv,
 			       struct host_cmd_ds_command *cmd,
 			       u16 cmd_action, uint16_t ps_bitmap,
-			       void *data_buf);
+			       struct mwifiex_ds_auto_ds *auto_ds);
 int mwifiex_ret_enh_power_mode(struct mwifiex_private *priv,
 			       struct host_cmd_ds_command *resp,
-			       void *data_buf);
+			       struct mwifiex_ds_pm_cfg *pm_cfg);
 void mwifiex_process_hs_config(struct mwifiex_adapter *adapter);
 void mwifiex_hs_activated_event(struct mwifiex_private *priv,
 					u8 activated);
@@ -751,7 +751,7 @@ int mwifiex_sta_prepare_cmd(struct mwifiex_private *, uint16_t cmd_no,
 			    u16 cmd_action, u32 cmd_oid,
 			    void *data_buf, void *cmd_buf);
 int mwifiex_process_sta_cmdresp(struct mwifiex_private *, u16 cmdresp_no,
-				void *cmd_buf);
+				struct host_cmd_ds_command *resp);
 int mwifiex_process_sta_rx_packet(struct mwifiex_adapter *,
 				  struct sk_buff *skb);
 int mwifiex_process_sta_event(struct mwifiex_private *);
@@ -760,7 +760,7 @@ int mwifiex_sta_init_cmd(struct mwifiex_private *, u8 first_sta);
 int mwifiex_scan_networks(struct mwifiex_private *priv,
 			  const struct mwifiex_user_scan_cfg *user_scan_in);
 int mwifiex_cmd_802_11_scan(struct host_cmd_ds_command *cmd,
-			    void *data_buf);
+			    struct mwifiex_scan_cmd_config *scan_cfg);
 void mwifiex_queue_scan_cmd(struct mwifiex_private *priv,
 			    struct cmd_ctrl_node *cmd_node);
 int mwifiex_ret_802_11_scan(struct mwifiex_private *priv,
@@ -777,8 +777,8 @@ s32 mwifiex_ssid_cmp(struct mwifiex_802_11_ssid *ssid1,
 int mwifiex_associate(struct mwifiex_private *priv,
 		      struct mwifiex_bssdescriptor *bss_desc);
 int mwifiex_cmd_802_11_associate(struct mwifiex_private *priv,
-				 struct host_cmd_ds_command
-				 *cmd, void *data_buf);
+				 struct host_cmd_ds_command *cmd,
+				 struct mwifiex_bssdescriptor *bss_desc);
 int mwifiex_ret_802_11_associate(struct mwifiex_private *priv,
 				 struct host_cmd_ds_command *resp);
 void mwifiex_reset_connect_state(struct mwifiex_private *priv);
@@ -791,10 +791,10 @@ int mwifiex_adhoc_join(struct mwifiex_private *priv,
 		       struct mwifiex_bssdescriptor *bss_desc);
 int mwifiex_cmd_802_11_ad_hoc_start(struct mwifiex_private *priv,
 				    struct host_cmd_ds_command *cmd,
-				    void *data_buf);
+				    struct mwifiex_802_11_ssid *req_ssid);
 int mwifiex_cmd_802_11_ad_hoc_join(struct mwifiex_private *priv,
 				   struct host_cmd_ds_command *cmd,
-				   void *data_buf);
+				   struct mwifiex_bssdescriptor *bss_desc);
 int mwifiex_ret_802_11_ad_hoc(struct mwifiex_private *priv,
 			      struct host_cmd_ds_command *resp);
 int mwifiex_cmd_802_11_bg_scan_query(struct host_cmd_ds_command *cmd);
diff --git a/drivers/net/wireless/mwifiex/scan.c b/drivers/net/wireless/mwifiex/scan.c
index 5c22860fb40..6f88c8ab5de 100644
--- a/drivers/net/wireless/mwifiex/scan.c
+++ b/drivers/net/wireless/mwifiex/scan.c
@@ -2357,12 +2357,10 @@ int mwifiex_scan_networks(struct mwifiex_private *priv,
  *      - Setting command ID, and proper size
  *      - Ensuring correct endian-ness
  */
-int mwifiex_cmd_802_11_scan(struct host_cmd_ds_command *cmd, void *data_buf)
+int mwifiex_cmd_802_11_scan(struct host_cmd_ds_command *cmd,
+			    struct mwifiex_scan_cmd_config *scan_cfg)
 {
 	struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan;
-	struct mwifiex_scan_cmd_config *scan_cfg;
-
-	scan_cfg = (struct mwifiex_scan_cmd_config *) data_buf;
 
 	/* Set fixed field variables in scan command */
 	scan_cmd->bss_mode = scan_cfg->bss_mode;
diff --git a/drivers/net/wireless/mwifiex/sta_cmd.c b/drivers/net/wireless/mwifiex/sta_cmd.c
index 8af3a78d272..d85a0a60aa6 100644
--- a/drivers/net/wireless/mwifiex/sta_cmd.c
+++ b/drivers/net/wireless/mwifiex/sta_cmd.c
@@ -67,10 +67,9 @@ mwifiex_cmd_802_11_rssi_info(struct mwifiex_private *priv,
  */
 static int mwifiex_cmd_mac_control(struct mwifiex_private *priv,
 				   struct host_cmd_ds_command *cmd,
-				   u16 cmd_action, void *data_buf)
+				   u16 cmd_action, u16 *action)
 {
 	struct host_cmd_ds_mac_control *mac_ctrl = &cmd->params.mac_ctrl;
-	u16 action = *((u16 *) data_buf);
 
 	if (cmd_action != HostCmd_ACT_GEN_SET) {
 		dev_err(priv->adapter->dev,
@@ -81,7 +80,7 @@ static int mwifiex_cmd_mac_control(struct mwifiex_private *priv,
 	cmd->command = cpu_to_le16(HostCmd_CMD_MAC_CONTROL);
 	cmd->size =
 		cpu_to_le16(sizeof(struct host_cmd_ds_mac_control) + S_DS_GEN);
-	mac_ctrl->action = cpu_to_le16(action);
+	mac_ctrl->action = cpu_to_le16(*action);
 
 	return 0;
 }
@@ -104,10 +103,9 @@ static int mwifiex_cmd_mac_control(struct mwifiex_private *priv,
 static int mwifiex_cmd_802_11_snmp_mib(struct mwifiex_private *priv,
 				       struct host_cmd_ds_command *cmd,
 				       u16 cmd_action, u32 cmd_oid,
-				       void *data_buf)
+				       u32 *ul_temp)
 {
 	struct host_cmd_ds_802_11_snmp_mib *snmp_mib = &cmd->params.smib;
-	u32 ul_temp;
 
 	dev_dbg(priv->adapter->dev, "cmd: SNMP_CMD: cmd_oid = 0x%x\n", cmd_oid);
 	cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SNMP_MIB);
@@ -127,9 +125,8 @@ static int mwifiex_cmd_802_11_snmp_mib(struct mwifiex_private *priv,
 		if (cmd_action == HostCmd_ACT_GEN_SET) {
 			snmp_mib->query_type = cpu_to_le16(HostCmd_ACT_GEN_SET);
 			snmp_mib->buf_size = cpu_to_le16(sizeof(u16));
-			ul_temp = *((u32 *) data_buf);
 			*((__le16 *) (snmp_mib->value)) =
-				cpu_to_le16((u16) ul_temp);
+				cpu_to_le16((u16) *ul_temp);
 			cmd->size = cpu_to_le16(le16_to_cpu(cmd->size)
 				+ sizeof(u16));
 		}
@@ -139,9 +136,8 @@ static int mwifiex_cmd_802_11_snmp_mib(struct mwifiex_private *priv,
 		if (cmd_action == HostCmd_ACT_GEN_SET) {
 			snmp_mib->query_type = cpu_to_le16(HostCmd_ACT_GEN_SET);
 			snmp_mib->buf_size = cpu_to_le16(sizeof(u16));
-			ul_temp = *((u32 *) data_buf);
 			*(__le16 *) (snmp_mib->value) =
-				cpu_to_le16((u16) ul_temp);
+				cpu_to_le16((u16) *ul_temp);
 			cmd->size = cpu_to_le16(le16_to_cpu(cmd->size)
 				+ sizeof(u16));
 		}
@@ -152,9 +148,8 @@ static int mwifiex_cmd_802_11_snmp_mib(struct mwifiex_private *priv,
 		if (cmd_action == HostCmd_ACT_GEN_SET) {
 			snmp_mib->query_type = cpu_to_le16(HostCmd_ACT_GEN_SET);
 			snmp_mib->buf_size = cpu_to_le16(sizeof(u16));
-			ul_temp = (*(u32 *) data_buf);
 			*((__le16 *) (snmp_mib->value)) =
-				cpu_to_le16((u16) ul_temp);
+				cpu_to_le16((u16) *ul_temp);
 			cmd->size = cpu_to_le16(le16_to_cpu(cmd->size)
 				+ sizeof(u16));
 		}
@@ -164,9 +159,8 @@ static int mwifiex_cmd_802_11_snmp_mib(struct mwifiex_private *priv,
 		if (cmd_action == HostCmd_ACT_GEN_SET) {
 			snmp_mib->query_type = cpu_to_le16(HostCmd_ACT_GEN_SET);
 			snmp_mib->buf_size = cpu_to_le16(sizeof(u16));
-			ul_temp = *(u32 *) data_buf;
 			*((__le16 *) (snmp_mib->value)) =
-				cpu_to_le16((u16) ul_temp);
+				cpu_to_le16((u16) *ul_temp);
 			cmd->size = cpu_to_le16(le16_to_cpu(cmd->size)
 				+ sizeof(u16));
 		}
@@ -209,13 +203,11 @@ mwifiex_cmd_802_11_get_log(struct host_cmd_ds_command *cmd)
  */
 static int mwifiex_cmd_tx_rate_cfg(struct mwifiex_private *priv,
 				   struct host_cmd_ds_command *cmd,
-				   u16 cmd_action, void *data_buf)
+				   u16 cmd_action, u16 *pbitmap_rates)
 {
 	struct host_cmd_ds_tx_rate_cfg *rate_cfg = &cmd->params.tx_rate_cfg;
 	struct mwifiex_rate_scope *rate_scope;
 	struct mwifiex_rate_drop_pattern *rate_drop;
-	u16 *pbitmap_rates = (u16 *) data_buf;
-
 	u32 i;
 
 	cmd->command = cpu_to_le16(HostCmd_CMD_TX_RATE_CFG);
@@ -272,10 +264,10 @@ static int mwifiex_cmd_tx_rate_cfg(struct mwifiex_private *priv,
  *      - Ensuring correct endian-ness
  */
 static int mwifiex_cmd_tx_power_cfg(struct host_cmd_ds_command *cmd,
-				    u16 cmd_action, void *data_buf)
+				    u16 cmd_action,
+				    struct host_cmd_ds_txpwr_cfg *txp)
 {
 	struct mwifiex_types_power_group *pg_tlv;
-	struct host_cmd_ds_txpwr_cfg *txp;
 	struct host_cmd_ds_txpwr_cfg *cmd_txp_cfg = &cmd->params.txp_cfg;
 
 	cmd->command = cpu_to_le16(HostCmd_CMD_TXPWR_CFG);
@@ -283,12 +275,11 @@ static int mwifiex_cmd_tx_power_cfg(struct host_cmd_ds_command *cmd,
 		cpu_to_le16(S_DS_GEN + sizeof(struct host_cmd_ds_txpwr_cfg));
 	switch (cmd_action) {
 	case HostCmd_ACT_GEN_SET:
-		txp = (struct host_cmd_ds_txpwr_cfg *) data_buf;
 		if (txp->mode) {
 			pg_tlv = (struct mwifiex_types_power_group
-				  *) ((unsigned long) data_buf +
+				  *) ((unsigned long) txp +
 				     sizeof(struct host_cmd_ds_txpwr_cfg));
-			memmove(cmd_txp_cfg, data_buf,
+			memmove(cmd_txp_cfg, txp,
 				sizeof(struct host_cmd_ds_txpwr_cfg) +
 				sizeof(struct mwifiex_types_power_group) +
 				pg_tlv->length);
@@ -300,8 +291,7 @@ static int mwifiex_cmd_tx_power_cfg(struct host_cmd_ds_command *cmd,
 				  sizeof(struct mwifiex_types_power_group) +
 				  pg_tlv->length);
 		} else {
-			memmove(cmd_txp_cfg, data_buf,
-				sizeof(struct host_cmd_ds_txpwr_cfg));
+			memmove(cmd_txp_cfg, txp, sizeof(*txp));
 		}
 		cmd_txp_cfg->action = cpu_to_le16(cmd_action);
 		break;
@@ -322,22 +312,23 @@ static int mwifiex_cmd_tx_power_cfg(struct host_cmd_ds_command *cmd,
  *        (as required)
  *      - Ensuring correct endian-ness
  */
-static int mwifiex_cmd_802_11_hs_cfg(struct mwifiex_private *priv,
-				     struct host_cmd_ds_command *cmd,
-				     u16 cmd_action,
-				     struct mwifiex_hs_config_param *data_buf)
+static int
+mwifiex_cmd_802_11_hs_cfg(struct mwifiex_private *priv,
+			  struct host_cmd_ds_command *cmd,
+			  u16 cmd_action,
+			  struct mwifiex_hs_config_param *hscfg_param)
 {
 	struct mwifiex_adapter *adapter = priv->adapter;
 	struct host_cmd_ds_802_11_hs_cfg_enh *hs_cfg = &cmd->params.opt_hs_cfg;
 	u16 hs_activate = false;
 
-	if (data_buf == NULL)
+	if (!hscfg_param)
 		/* New Activate command */
 		hs_activate = true;
 	cmd->command = cpu_to_le16(HostCmd_CMD_802_11_HS_CFG_ENH);
 
 	if (!hs_activate &&
-	    (data_buf->conditions
+	    (hscfg_param->conditions
 	    != cpu_to_le32(HOST_SLEEP_CFG_CANCEL))
 	    && ((adapter->arp_filter_size > 0)
 		&& (adapter->arp_filter_size <= ARP_FILTER_MAX_BUF_SIZE))) {
@@ -359,9 +350,9 @@ static int mwifiex_cmd_802_11_hs_cfg(struct mwifiex_private *priv,
 		hs_cfg->params.hs_activate.resp_ctrl = RESP_NEEDED;
 	} else {
 		hs_cfg->action = cpu_to_le16(HS_CONFIGURE);
-		hs_cfg->params.hs_config.conditions = data_buf->conditions;
-		hs_cfg->params.hs_config.gpio = data_buf->gpio;
-		hs_cfg->params.hs_config.gap = data_buf->gap;
+		hs_cfg->params.hs_config.conditions = hscfg_param->conditions;
+		hs_cfg->params.hs_config.gpio = hscfg_param->gpio;
+		hs_cfg->params.hs_config.gap = hscfg_param->gap;
 		dev_dbg(adapter->dev,
 			"cmd: HS_CFG_CMD: condition:0x%x gpio:0x%x gap:0x%x\n",
 		       hs_cfg->params.hs_config.conditions,
@@ -405,11 +396,11 @@ static int mwifiex_cmd_802_11_mac_address(struct mwifiex_private *priv,
  *      - Setting MAC multicast address
  *      - Ensuring correct endian-ness
  */
-static int mwifiex_cmd_mac_multicast_adr(struct host_cmd_ds_command *cmd,
-					 u16 cmd_action, void *data_buf)
+static int
+mwifiex_cmd_mac_multicast_adr(struct host_cmd_ds_command *cmd,
+			      u16 cmd_action,
+			      struct mwifiex_multicast_list *mcast_list)
 {
-	struct mwifiex_multicast_list *mcast_list =
-		(struct mwifiex_multicast_list *) data_buf;
 	struct host_cmd_ds_mac_multicast_adr *mcast_addr = &cmd->params.mc_addr;
 
 	cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_mac_multicast_adr) +
@@ -435,7 +426,7 @@ static int mwifiex_cmd_mac_multicast_adr(struct host_cmd_ds_command *cmd,
  */
 static int mwifiex_cmd_802_11_deauthenticate(struct mwifiex_private *priv,
 					     struct host_cmd_ds_command *cmd,
-					     void *data_buf)
+					     u8 *mac)
 {
 	struct host_cmd_ds_802_11_deauthenticate *deauth = &cmd->params.deauth;
 
@@ -444,7 +435,7 @@ static int mwifiex_cmd_802_11_deauthenticate(struct mwifiex_private *priv,
 				+ S_DS_GEN);
 
 	/* Set AP MAC address */
-	memcpy(deauth->mac_addr, (u8 *) data_buf, ETH_ALEN);
+	memcpy(deauth->mac_addr, mac, ETH_ALEN);
 
 	dev_dbg(priv->adapter->dev, "cmd: Deauth: %pM\n", deauth->mac_addr);
 
@@ -543,15 +534,14 @@ mwifiex_set_keyparamset_wep(struct mwifiex_private *priv,
  *        encryption (TKIP, AES) (as required)
  *      - Ensuring correct endian-ness
  */
-static int mwifiex_cmd_802_11_key_material(struct mwifiex_private *priv,
-					   struct host_cmd_ds_command *cmd,
-					   u16 cmd_action,
-					   u32 cmd_oid, void *data_buf)
+static int
+mwifiex_cmd_802_11_key_material(struct mwifiex_private *priv,
+				struct host_cmd_ds_command *cmd,
+				u16 cmd_action, u32 cmd_oid,
+				struct mwifiex_ds_encrypt_key *enc_key)
 {
 	struct host_cmd_ds_802_11_key_material *key_material =
 		&cmd->params.key_material;
-	struct mwifiex_ds_encrypt_key *enc_key =
-		(struct mwifiex_ds_encrypt_key *) data_buf;
 	u16 key_param_len = 0;
 	int ret = 0;
 	const u8 bc_mac[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
@@ -741,7 +731,7 @@ static int mwifiex_cmd_802_11d_domain_info(struct mwifiex_private *priv,
  */
 static int mwifiex_cmd_802_11_rf_channel(struct mwifiex_private *priv,
 					 struct host_cmd_ds_command *cmd,
-					 u16 cmd_action, void *data_buf)
+					 u16 cmd_action, u16 *channel)
 {
 	struct host_cmd_ds_802_11_rf_channel *rf_chan =
 		&cmd->params.rf_channel;
@@ -759,7 +749,7 @@ static int mwifiex_cmd_802_11_rf_channel(struct mwifiex_private *priv,
 
 		rf_type = le16_to_cpu(rf_chan->rf_type);
 		SET_SECONDARYCHAN(rf_type, priv->adapter->chan_offset);
-		rf_chan->current_channel = cpu_to_le16(*((u16 *) data_buf));
+		rf_chan->current_channel = cpu_to_le16(*channel);
 	}
 	rf_chan->action = cpu_to_le16(cmd_action);
 	return 0;
@@ -774,11 +764,10 @@ static int mwifiex_cmd_802_11_rf_channel(struct mwifiex_private *priv,
  *      - Ensuring correct endian-ness
  */
 static int mwifiex_cmd_ibss_coalescing_status(struct host_cmd_ds_command *cmd,
-					      u16 cmd_action, void *data_buf)
+					      u16 cmd_action, u16 *enable)
 {
 	struct host_cmd_ds_802_11_ibss_status *ibss_coal =
 		&(cmd->params.ibss_coalescing);
-	u16 enable = 0;
 
 	cmd->command = cpu_to_le16(HostCmd_CMD_802_11_IBSS_COALESCING_STATUS);
 	cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_802_11_ibss_status) +
@@ -788,9 +777,8 @@ static int mwifiex_cmd_ibss_coalescing_status(struct host_cmd_ds_command *cmd,
 
 	switch (cmd_action) {
 	case HostCmd_ACT_GEN_SET:
-		if (data_buf != NULL)
-			enable = *(u16 *) data_buf;
-		ibss_coal->enable = cpu_to_le16(enable);
+		if (enable)
+			ibss_coal->enable = cpu_to_le16(*enable);
 		break;
 
 		/* In other case.. Nothing to do */
@@ -822,9 +810,8 @@ static int mwifiex_cmd_ibss_coalescing_status(struct host_cmd_ds_command *cmd,
 static int mwifiex_cmd_reg_access(struct host_cmd_ds_command *cmd,
 				  u16 cmd_action, void *data_buf)
 {
-	struct mwifiex_ds_reg_rw *reg_rw;
+	struct mwifiex_ds_reg_rw *reg_rw = data_buf;
 
-	reg_rw = (struct mwifiex_ds_reg_rw *) data_buf;
 	switch (le16_to_cpu(cmd->command)) {
 	case HostCmd_CMD_MAC_REG_ACCESS:
 	{
@@ -893,8 +880,7 @@ static int mwifiex_cmd_reg_access(struct host_cmd_ds_command *cmd,
 	}
 	case HostCmd_CMD_802_11_EEPROM_ACCESS:
 	{
-		struct mwifiex_ds_read_eeprom *rd_eeprom =
-			(struct mwifiex_ds_read_eeprom *) data_buf;
+		struct mwifiex_ds_read_eeprom *rd_eeprom = data_buf;
 		struct host_cmd_ds_802_11_eeprom_access *cmd_eeprom =
 			(struct host_cmd_ds_802_11_eeprom_access *)
 			&cmd->params.eeprom;
@@ -923,8 +909,7 @@ int mwifiex_sta_prepare_cmd(struct mwifiex_private *priv, uint16_t cmd_no,
 			    u16 cmd_action, u32 cmd_oid,
 			    void *data_buf, void *cmd_buf)
 {
-	struct host_cmd_ds_command *cmd_ptr =
-		(struct host_cmd_ds_command *) cmd_buf;
+	struct host_cmd_ds_command *cmd_ptr = cmd_buf;
 	int ret = 0;
 
 	/* Prepare command */
@@ -1181,7 +1166,7 @@ int mwifiex_sta_init_cmd(struct mwifiex_private *priv, u8 first_sta)
 	/* Send request to firmware */
 	ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_AMSDU_AGGR_CTRL,
 				     HostCmd_ACT_GEN_SET, 0,
-				     (void *) &amsdu_aggr_ctrl);
+				     &amsdu_aggr_ctrl);
 	if (ret)
 		return -1;
 	/* MAC Control must be the last command in init_fw */
diff --git a/drivers/net/wireless/mwifiex/sta_cmdresp.c b/drivers/net/wireless/mwifiex/sta_cmdresp.c
index d08f76429a0..ad64c87b91d 100644
--- a/drivers/net/wireless/mwifiex/sta_cmdresp.c
+++ b/drivers/net/wireless/mwifiex/sta_cmdresp.c
@@ -120,11 +120,10 @@ mwifiex_process_cmdresp_error(struct mwifiex_private *priv,
  */
 static int mwifiex_ret_802_11_rssi_info(struct mwifiex_private *priv,
 					struct host_cmd_ds_command *resp,
-					void *data_buf)
+					struct mwifiex_ds_get_signal *signal)
 {
 	struct host_cmd_ds_802_11_rssi_info_rsp *rssi_info_rsp =
 		&resp->params.rssi_info_rsp;
-	struct mwifiex_ds_get_signal *signal;
 
 	priv->data_rssi_last = le16_to_cpu(rssi_info_rsp->data_rssi_last);
 	priv->data_nf_last = le16_to_cpu(rssi_info_rsp->data_nf_last);
@@ -139,9 +138,8 @@ static int mwifiex_ret_802_11_rssi_info(struct mwifiex_private *priv,
 	priv->bcn_nf_avg = le16_to_cpu(rssi_info_rsp->bcn_nf_avg);
 
 	/* Need to indicate IOCTL complete */
-	if (data_buf) {
-		signal = (struct mwifiex_ds_get_signal *) data_buf;
-		memset(signal, 0, sizeof(struct mwifiex_ds_get_signal));
+	if (signal) {
+		memset(signal, 0, sizeof(*signal));
 
 		signal->selector = ALL_RSSI_INFO_MASK;
 
@@ -185,32 +183,30 @@ static int mwifiex_ret_802_11_rssi_info(struct mwifiex_private *priv,
  */
 static int mwifiex_ret_802_11_snmp_mib(struct mwifiex_private *priv,
 				       struct host_cmd_ds_command *resp,
-				       void *data_buf)
+				       u32 *ul_temp)
 {
 	struct host_cmd_ds_802_11_snmp_mib *smib = &resp->params.smib;
 	u16 oid = le16_to_cpu(smib->oid);
 	u16 query_type = le16_to_cpu(smib->query_type);
-	u32 ul_temp;
 
 	dev_dbg(priv->adapter->dev, "info: SNMP_RESP: oid value = %#x,"
 			" query_type = %#x, buf size = %#x\n",
 			oid, query_type, le16_to_cpu(smib->buf_size));
 	if (query_type == HostCmd_ACT_GEN_GET) {
-		ul_temp = le16_to_cpu(*((__le16 *) (smib->value)));
-		if (data_buf)
-			*(u32 *)data_buf = ul_temp;
+		if (ul_temp)
+			*ul_temp = le16_to_cpu(*((__le16 *) (smib->value)));
 		switch (oid) {
 		case FRAG_THRESH_I:
 			dev_dbg(priv->adapter->dev,
-				"info: SNMP_RESP: FragThsd =%u\n", ul_temp);
+				"info: SNMP_RESP: FragThsd =%u\n", *ul_temp);
 			break;
 		case RTS_THRESH_I:
 			dev_dbg(priv->adapter->dev,
-				"info: SNMP_RESP: RTSThsd =%u\n", ul_temp);
+				"info: SNMP_RESP: RTSThsd =%u\n", *ul_temp);
 			break;
 		case SHORT_RETRY_LIM_I:
 			dev_dbg(priv->adapter->dev,
-				"info: SNMP_RESP: TxRetryCount=%u\n", ul_temp);
+				"info: SNMP_RESP: TxRetryCount=%u\n", *ul_temp);
 			break;
 		default:
 			break;
@@ -228,14 +224,12 @@ static int mwifiex_ret_802_11_snmp_mib(struct mwifiex_private *priv,
  */
 static int mwifiex_ret_get_log(struct mwifiex_private *priv,
 			       struct host_cmd_ds_command *resp,
-			       void *data_buf)
+			       struct mwifiex_ds_get_stats *stats)
 {
 	struct host_cmd_ds_802_11_get_log *get_log =
 		(struct host_cmd_ds_802_11_get_log *) &resp->params.get_log;
-	struct mwifiex_ds_get_stats *stats;
 
-	if (data_buf) {
-		stats = (struct mwifiex_ds_get_stats *) data_buf;
+	if (stats) {
 		stats->mcast_tx_frame = le32_to_cpu(get_log->mcast_tx_frame);
 		stats->failed = le32_to_cpu(get_log->failed);
 		stats->retry = le32_to_cpu(get_log->retry);
@@ -278,9 +272,8 @@ static int mwifiex_ret_get_log(struct mwifiex_private *priv,
  */
 static int mwifiex_ret_tx_rate_cfg(struct mwifiex_private *priv,
 				   struct host_cmd_ds_command *resp,
-				   void *data_buf)
+				   struct mwifiex_rate_cfg *ds_rate)
 {
-	struct mwifiex_rate_cfg *ds_rate;
 	struct host_cmd_ds_tx_rate_cfg *rate_cfg = &resp->params.tx_rate_cfg;
 	struct mwifiex_rate_scope *rate_scope;
 	struct mwifiex_ie_types_header *head;
@@ -329,8 +322,7 @@ static int mwifiex_ret_tx_rate_cfg(struct mwifiex_private *priv,
 					  HostCmd_CMD_802_11_TX_RATE_QUERY,
 					  HostCmd_ACT_GEN_GET, 0, NULL);
 
-	if (data_buf) {
-		ds_rate = (struct mwifiex_rate_cfg *) data_buf;
+	if (ds_rate) {
 		if (le16_to_cpu(rate_cfg->action) == HostCmd_ACT_GEN_GET) {
 			if (priv->is_data_rate_auto) {
 				ds_rate->is_rate_auto = 1;
@@ -413,8 +405,7 @@ static int mwifiex_get_power_level(struct mwifiex_private *priv, void *data_buf)
  * and saving the current Tx power level in driver.
  */
 static int mwifiex_ret_tx_power_cfg(struct mwifiex_private *priv,
-				    struct host_cmd_ds_command *resp,
-				    void *data_buf)
+				    struct host_cmd_ds_command *resp)
 {
 	struct mwifiex_adapter *adapter = priv->adapter;
 	struct host_cmd_ds_txpwr_cfg *txp_cfg = &resp->params.txp_cfg;
@@ -631,21 +622,21 @@ static int mwifiex_ret_802_11d_domain_info(struct mwifiex_private *priv,
  */
 static int mwifiex_ret_802_11_rf_channel(struct mwifiex_private *priv,
 					 struct host_cmd_ds_command *resp,
-					 void *data_buf)
+					 u16 *new_channel)
 {
 	struct host_cmd_ds_802_11_rf_channel *rf_channel =
 		&resp->params.rf_channel;
-	u16 new_channel = le16_to_cpu(rf_channel->current_channel);
 
-	if (priv->curr_bss_params.bss_descriptor.channel != new_channel) {
+	if (new_channel)
+		*new_channel = le16_to_cpu(rf_channel->current_channel);
+
+	if (priv->curr_bss_params.bss_descriptor.channel != *new_channel) {
 		dev_dbg(priv->adapter->dev, "cmd: Channel Switch: %d to %d\n",
 		       priv->curr_bss_params.bss_descriptor.channel,
-		       new_channel);
+		       *new_channel);
 		/* Update the channel again */
-		priv->curr_bss_params.bss_descriptor.channel = new_channel;
+		priv->curr_bss_params.bss_descriptor.channel = *new_channel;
 	}
-	if (data_buf)
-		*((u16 *)data_buf) = new_channel;
 
 	return 0;
 }
@@ -658,13 +649,11 @@ static int mwifiex_ret_802_11_rf_channel(struct mwifiex_private *priv,
  */
 static int mwifiex_ret_ver_ext(struct mwifiex_private *priv,
 			       struct host_cmd_ds_command *resp,
-			       void *data_buf)
+			       struct host_cmd_ds_version_ext *version_ext)
 {
 	struct host_cmd_ds_version_ext *ver_ext = &resp->params.verext;
-	struct host_cmd_ds_version_ext *version_ext;
 
-	if (data_buf) {
-		version_ext = (struct host_cmd_ds_version_ext *)data_buf;
+	if (version_ext) {
 		version_ext->version_str_sel = ver_ext->version_str_sel;
 		memcpy(version_ext->version_str, ver_ext->version_str,
 		       sizeof(char) * 128);
@@ -686,8 +675,8 @@ static int mwifiex_ret_reg_access(u16 type, struct host_cmd_ds_command *resp,
 	struct mwifiex_ds_read_eeprom *eeprom;
 
 	if (data_buf) {
-		reg_rw = (struct mwifiex_ds_reg_rw *) data_buf;
-		eeprom = (struct mwifiex_ds_read_eeprom *) data_buf;
+		reg_rw = data_buf;
+		eeprom = data_buf;
 		switch (type) {
 		case HostCmd_CMD_MAC_REG_ACCESS:
 			{
@@ -825,13 +814,11 @@ static int mwifiex_ret_ibss_coalescing_status(struct mwifiex_private *priv,
  * This is a generic function, which calls command specific
  * response handlers based on the command ID.
  */
-int mwifiex_process_sta_cmdresp(struct mwifiex_private *priv,
-				u16 cmdresp_no, void *cmd_buf)
+int mwifiex_process_sta_cmdresp(struct mwifiex_private *priv, u16 cmdresp_no,
+				struct host_cmd_ds_command *resp)
 {
 	int ret = 0;
 	struct mwifiex_adapter *adapter = priv->adapter;
-	struct host_cmd_ds_command *resp =
-		(struct host_cmd_ds_command *) cmd_buf;
 	void *data_buf = adapter->curr_cmd->data_buf;
 
 	/* If the command is not successful, cleanup and return failure */
@@ -865,7 +852,7 @@ int mwifiex_process_sta_cmdresp(struct mwifiex_private *priv,
 			"info: CMD_RESP: BG_SCAN result is ready!\n");
 		break;
 	case HostCmd_CMD_TXPWR_CFG:
-		ret = mwifiex_ret_tx_power_cfg(priv, resp, data_buf);
+		ret = mwifiex_ret_tx_power_cfg(priv, resp);
 		break;
 	case HostCmd_CMD_802_11_PS_MODE_ENH:
 		ret = mwifiex_ret_enh_power_mode(priv, resp, data_buf);
diff --git a/drivers/net/wireless/mwifiex/sta_rx.c b/drivers/net/wireless/mwifiex/sta_rx.c
index 1fdddece747..27430512f7c 100644
--- a/drivers/net/wireless/mwifiex/sta_rx.c
+++ b/drivers/net/wireless/mwifiex/sta_rx.c
@@ -187,7 +187,7 @@ int mwifiex_process_sta_rx_packet(struct mwifiex_adapter *adapter,
 	ret = mwifiex_11n_rx_reorder_pkt(priv, local_rx_pd->seq_num,
 					     local_rx_pd->priority, ta,
 					     (u8) local_rx_pd->rx_pkt_type,
-						(void *) skb);
+					     skb);
 
 	if (ret || (rx_pkt_type == PKT_TYPE_BAR)) {
 		if (priv && (ret == -1))
diff --git a/drivers/net/wireless/mwifiex/txrx.c b/drivers/net/wireless/mwifiex/txrx.c
index aaa50c07419..6190b2fa57a 100644
--- a/drivers/net/wireless/mwifiex/txrx.c
+++ b/drivers/net/wireless/mwifiex/txrx.c
@@ -71,7 +71,7 @@ int mwifiex_process_tx(struct mwifiex_private *priv, struct sk_buff *skb,
 	u8 *head_ptr;
 	struct txpd *local_tx_pd = NULL;
 
-	head_ptr = (u8 *) mwifiex_process_sta_txpd(priv, skb);
+	head_ptr = mwifiex_process_sta_txpd(priv, skb);
 	if (head_ptr) {
 		if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA)
 			local_tx_pd =