staging: r8712u: Remove useless return variables

This patch remove variables that are initialized with a constant,
are never updated, and are only used as parameter of return.
Return the constant instead of using a variable.

Verified by compilation only.

The coccinelle script that find and fixes this issue is:
// <smpl>
@@
type T;
constant C;
identifier ret;
@@
- T ret = C;
... when != ret
- return ret;
+ return C;
// </smpl>
Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8712/ieee80211.c

@@ -289,7 +289,7 @@ static int r8712_get_wpa2_cipher_suite(u8 *s)
 int r8712_parse_wpa_ie(u8 *wpa_ie, int wpa_ie_len, int *group_cipher,
 		 int *pairwise_cipher)
 {
-	int i, ret = _SUCCESS;
+	int i;
 	int left, count;
 	u8 *pos;
 
@@ -324,13 +324,13 @@ int r8712_parse_wpa_ie(u8 *wpa_ie, int wpa_ie_len, int *group_cipher,
 		}
 	} else if (left == 1)
 		return _FAIL;
-	return ret;
+	return _SUCCESS;
 }
 
 int r8712_parse_wpa2_ie(u8 *rsn_ie, int rsn_ie_len, int *group_cipher,
 		  int *pairwise_cipher)
 {
-	int i, ret = _SUCCESS;
+	int i;
 	int left, count;
 	u8 *pos;
 
@@ -364,7 +364,7 @@ int r8712_parse_wpa2_ie(u8 *rsn_ie, int rsn_ie_len, int *group_cipher,
 		}
 	} else if (left == 1)
 		return _FAIL;
-	return ret;
+	return _SUCCESS;
 }
 
 int r8712_get_sec_ie(u8 *in_ie, uint in_len, u8 *rsn_ie, u16 *rsn_len,

drivers/staging/rtl8712/rtl8712_cmd.c

@@ -290,8 +290,7 @@ static struct cmd_obj *cmd_hdl_filter(struct _adapter *padapter,
 
 static u8 check_cmd_fifo(struct _adapter *padapter, uint sz)
 {
-	u8 res = _SUCCESS;
-	return res;
+	return _SUCCESS;
 }
 
 u8 r8712_fw_cmd(struct _adapter *pAdapter, u32 cmd)

drivers/staging/rtl8712/rtl8712_recv.c

@@ -123,8 +123,6 @@ void r8712_free_recv_priv(struct recv_priv *precvpriv)
 
 int r8712_init_recvbuf(struct _adapter *padapter, struct recv_buf *precvbuf)
 {
-	int res = _SUCCESS;
-
 	precvbuf->transfer_len = 0;
 	precvbuf->len = 0;
 	precvbuf->ref_cnt = 0;
@@ -134,7 +132,7 @@ int r8712_init_recvbuf(struct _adapter *padapter, struct recv_buf *precvbuf)
 		precvbuf->ptail = precvbuf->pbuf;
 		precvbuf->pend = precvbuf->pdata + MAX_RECVBUF_SZ;
 	}
-	return res;
+	return _SUCCESS;
 }
 
 int r8712_free_recvframe(union recv_frame *precvframe,
@@ -347,7 +345,6 @@ static int amsdu_to_msdu(struct _adapter *padapter, union recv_frame *prframe)
 	_pkt *sub_skb, *subframes[MAX_SUBFRAME_COUNT];
 	struct recv_priv *precvpriv = &padapter->recvpriv;
 	struct  __queue *pfree_recv_queue = &(precvpriv->free_recv_queue);
-	int	ret = _SUCCESS;
 
 	nr_subframes = 0;
 	pattrib = &prframe->u.hdr.attrib;
@@ -435,7 +432,7 @@ static int amsdu_to_msdu(struct _adapter *padapter, union recv_frame *prframe)
 exit:
 	prframe->u.hdr.len = 0;
 	r8712_free_recvframe(prframe, pfree_recv_queue);
-	return ret;
+	return _SUCCESS;
 }
 
 void r8712_rxcmd_event_hdl(struct _adapter *padapter, void *prxcmdbuf)

drivers/staging/rtl8712/rtl871x_mlme.c

@@ -1211,7 +1211,6 @@ sint r8712_set_auth(struct _adapter *adapter,
 	struct cmd_priv	*pcmdpriv = &adapter->cmdpriv;
 	struct cmd_obj *pcmd;
 	struct setauth_parm *psetauthparm;
-	sint ret = _SUCCESS;
 
 	pcmd = (struct cmd_obj *)_malloc(sizeof(struct cmd_obj));
 	if (pcmd == NULL)
@@ -1232,7 +1231,7 @@ sint r8712_set_auth(struct _adapter *adapter,
 	pcmd->rspsz = 0;
 	_init_listhead(&pcmd->list);
 	r8712_enqueue_cmd(pcmdpriv, pcmd);
-	return ret;
+	return _SUCCESS;
 }
 
 sint r8712_set_key(struct _adapter *adapter,

drivers/staging/rtl8712/rtl871x_mp.c

@@ -80,9 +80,8 @@ static int init_mp_priv(struct mp_priv *pmp_priv)
 
 static int free_mp_priv(struct mp_priv *pmp_priv)
 {
-	int res = 0;
 	kfree(pmp_priv->pallocated_mp_xmitframe_buf);
-	return res;
+	return 0;
 }
 
 void mp871xinit(struct _adapter *padapter)

drivers/staging/rtl8712/rtl871x_mp_ioctl.c

@@ -66,7 +66,6 @@ uint oid_rt_wireless_mode_hdl(struct oid_par_priv *poid_par_priv)
 
 uint oid_rt_pro_write_bb_reg_hdl(struct oid_par_priv *poid_par_priv)
 {
-	uint status = RNDIS_STATUS_SUCCESS;
 	struct _adapter *Adapter = (struct _adapter *)
 				   (poid_par_priv->adapter_context);
 	struct bb_reg_param *pbbreg;
@@ -83,12 +82,11 @@ uint oid_rt_pro_write_bb_reg_hdl(struct oid_par_priv *poid_par_priv)
 		offset |= BB_REG_BASE_ADDR;
 	value = pbbreg->value;
 	r8712_bb_reg_write(Adapter, offset, value);
-	return status;
+	return RNDIS_STATUS_SUCCESS;
 }
 
 uint oid_rt_pro_read_bb_reg_hdl(struct oid_par_priv *poid_par_priv)
 {
-	uint status = RNDIS_STATUS_SUCCESS;
 	struct _adapter *Adapter = (struct _adapter *)
 				   (poid_par_priv->adapter_context);
 	struct bb_reg_param *pbbreg;
@@ -106,12 +104,11 @@ uint oid_rt_pro_read_bb_reg_hdl(struct oid_par_priv *poid_par_priv)
 	value = r8712_bb_reg_read(Adapter, offset);
 	pbbreg->value = value;
 	*poid_par_priv->bytes_rw = poid_par_priv->information_buf_len;
-	return status;
+	return RNDIS_STATUS_SUCCESS;
 }
 
 uint oid_rt_pro_write_rf_reg_hdl(struct oid_par_priv *poid_par_priv)
 {
-	uint status = RNDIS_STATUS_SUCCESS;
 	struct _adapter *Adapter = (struct _adapter *)
 				   (poid_par_priv->adapter_context);
 	struct rf_reg_param *pbbreg;
@@ -130,14 +127,13 @@ uint oid_rt_pro_write_rf_reg_hdl(struct oid_par_priv *poid_par_priv)
 	offset = (u8)pbbreg->offset;
 	value = pbbreg->value;
 	r8712_rf_reg_write(Adapter, path, offset, value);
-	return status;
+	return RNDIS_STATUS_SUCCESS;
 }
 
 uint oid_rt_pro_read_rf_reg_hdl(struct oid_par_priv *poid_par_priv)
 {
 	struct _adapter *Adapter = (struct _adapter *)
 				   (poid_par_priv->adapter_context);
-	uint status = RNDIS_STATUS_SUCCESS;
 	struct rf_reg_param *pbbreg;
 	u8 path;
 	u8 offset;
@@ -155,7 +151,7 @@ uint oid_rt_pro_read_rf_reg_hdl(struct oid_par_priv *poid_par_priv)
 	value = r8712_rf_reg_read(Adapter, path, offset);
 	pbbreg->value = value;
 	*poid_par_priv->bytes_rw = poid_par_priv->information_buf_len;
-	return status;
+	return RNDIS_STATUS_SUCCESS;
 }
 
 /*This function initializes the DUT to the MP test mode*/
@@ -266,7 +262,6 @@ uint oid_rt_pro_set_data_rate_hdl(struct oid_par_priv
 {
 	struct _adapter *Adapter = (struct _adapter *)
 				   (poid_par_priv->adapter_context);
-	uint status = RNDIS_STATUS_SUCCESS;
 	u32 ratevalue;
 
 	if (poid_par_priv->type_of_oid != SET_OID)
@@ -278,7 +273,7 @@ uint oid_rt_pro_set_data_rate_hdl(struct oid_par_priv
 		return RNDIS_STATUS_INVALID_DATA;
 	Adapter->mppriv.curr_rateidx = ratevalue;
 	r8712_SetDataRate(Adapter);
-	return status;
+	return RNDIS_STATUS_SUCCESS;
 }
 
 uint oid_rt_pro_start_test_hdl(struct oid_par_priv *poid_par_priv)
@@ -328,7 +323,6 @@ uint oid_rt_pro_set_channel_direct_call_hdl(struct oid_par_priv
 {
 	struct _adapter *Adapter = (struct _adapter *)
 				   (poid_par_priv->adapter_context);
-	uint status = RNDIS_STATUS_SUCCESS;
 	u32		Channel;
 
 	if (poid_par_priv->type_of_oid != SET_OID)
@@ -340,14 +334,13 @@ uint oid_rt_pro_set_channel_direct_call_hdl(struct oid_par_priv
 		return RNDIS_STATUS_NOT_ACCEPTED;
 	Adapter->mppriv.curr_ch = Channel;
 	r8712_SetChannel(Adapter);
-	return status;
+	return RNDIS_STATUS_SUCCESS;
 }
 
 uint oid_rt_pro_set_antenna_bb_hdl(struct oid_par_priv *poid_par_priv)
 {
 	struct _adapter *Adapter = (struct _adapter *)
 				   (poid_par_priv->adapter_context);
-	uint status = RNDIS_STATUS_SUCCESS;
 	u32 antenna;
 
 	if (poid_par_priv->type_of_oid != SET_OID)
@@ -358,7 +351,7 @@ uint oid_rt_pro_set_antenna_bb_hdl(struct oid_par_priv *poid_par_priv)
 	Adapter->mppriv.antenna_tx = (u16)((antenna & 0xFFFF0000) >> 16);
 	Adapter->mppriv.antenna_rx = (u16)(antenna & 0x0000FFFF);
 	r8712_SwitchAntenna(Adapter);
-	return status;
+	return RNDIS_STATUS_SUCCESS;
 }
 
 uint oid_rt_pro_set_tx_power_control_hdl(
@@ -366,7 +359,6 @@ uint oid_rt_pro_set_tx_power_control_hdl(
 {
 	struct _adapter *Adapter = (struct _adapter *)
 				   (poid_par_priv->adapter_context);
-	uint status = RNDIS_STATUS_SUCCESS;
 	u32 tx_pwr_idx;
 
 	if (poid_par_priv->type_of_oid != SET_OID)
@@ -378,7 +370,7 @@ uint oid_rt_pro_set_tx_power_control_hdl(
 		return RNDIS_STATUS_NOT_ACCEPTED;
 	Adapter->mppriv.curr_txpoweridx = (u8)tx_pwr_idx;
 	r8712_SetTxPower(Adapter);
-	return status;
+	return RNDIS_STATUS_SUCCESS;
 }
 
 uint oid_rt_pro_query_tx_packet_sent_hdl(
@@ -839,7 +831,6 @@ uint oid_rt_poll_rx_status_hdl(struct oid_par_priv *poid_par_priv)
 {
 	struct _adapter *Adapter = (struct _adapter *)
 				   (poid_par_priv->adapter_context);
-	uint status = RNDIS_STATUS_SUCCESS;
 
 	if (poid_par_priv->type_of_oid != QUERY_OID)
 		return RNDIS_STATUS_NOT_ACCEPTED;
@@ -847,7 +838,7 @@ uint oid_rt_poll_rx_status_hdl(struct oid_par_priv *poid_par_priv)
 		(unsigned char *)&Adapter->mppriv.rxstat,
 		sizeof(struct recv_stat));
 	*poid_par_priv->bytes_rw = poid_par_priv->information_buf_len;
-	return status;
+	return RNDIS_STATUS_SUCCESS;
 }
 
 uint oid_rt_pro_cfg_debug_message_hdl(struct oid_par_priv
@@ -875,7 +866,6 @@ uint oid_rt_get_thermal_meter_hdl(struct oid_par_priv *poid_par_priv)
 {
 	struct _adapter *Adapter = (struct _adapter *)
 				   (poid_par_priv->adapter_context);
-	uint status = RNDIS_STATUS_SUCCESS;
 
 	if (poid_par_priv->type_of_oid != QUERY_OID)
 		return RNDIS_STATUS_NOT_ACCEPTED;
@@ -897,7 +887,7 @@ uint oid_rt_get_thermal_meter_hdl(struct oid_par_priv *poid_par_priv)
 	*(u32 *)poid_par_priv->information_buf =
 				 Adapter->mppriv.workparam.io_value;
 	*poid_par_priv->bytes_rw = sizeof(u32);
-	return status;
+	return RNDIS_STATUS_SUCCESS;
 }
 
 uint oid_rt_pro_set_power_tracking_hdl(struct oid_par_priv
@@ -1091,7 +1081,6 @@ uint oid_rt_pro_dele_sta_info_hdl(struct oid_par_priv *poid_par_priv)
 				   (poid_par_priv->adapter_context);
 
 	unsigned long			irqL;
-	uint status = RNDIS_STATUS_SUCCESS;
 
 	struct sta_info		*psta = NULL;
 	u8			*macaddr;
@@ -1113,7 +1102,7 @@ uint oid_rt_pro_dele_sta_info_hdl(struct oid_par_priv *poid_par_priv)
 		spin_unlock_irqrestore(&(Adapter->stapriv.sta_hash_lock), irqL);
 	}
 
-	return status;
+	return RNDIS_STATUS_SUCCESS;
 }
 /*--------------------------------------------------------------------------*/
 static u32 mp_query_drv_var(struct _adapter *padapter, u8 offset, u32 var)
@@ -1126,8 +1115,6 @@ uint oid_rt_pro_query_dr_variable_hdl(struct oid_par_priv *poid_par_priv)
 	struct _adapter *Adapter = (struct _adapter *)
 				   (poid_par_priv->adapter_context);
 
-	uint status = RNDIS_STATUS_SUCCESS;
-
 	struct DR_VARIABLE_STRUCT *pdrv_var;
 
 	if (poid_par_priv->type_of_oid != QUERY_OID)
@@ -1139,7 +1126,7 @@ uint oid_rt_pro_query_dr_variable_hdl(struct oid_par_priv *poid_par_priv)
 	pdrv_var->variable = mp_query_drv_var(Adapter, pdrv_var->offset,
 					      pdrv_var->variable);
 	*poid_par_priv->bytes_rw = poid_par_priv->information_buf_len;
-	return status;
+	return RNDIS_STATUS_SUCCESS;
 }
 
 /*--------------------------------------------------------------------------*/
@@ -1243,7 +1230,6 @@ uint oid_rt_get_efuse_current_size_hdl(struct oid_par_priv
 {
 	struct _adapter *Adapter = (struct _adapter *)
 				   (poid_par_priv->adapter_context);
-	uint status = RNDIS_STATUS_SUCCESS;
 
 	if (poid_par_priv->type_of_oid != QUERY_OID)
 		return RNDIS_STATUS_NOT_ACCEPTED;
@@ -1254,14 +1240,13 @@ uint oid_rt_get_efuse_current_size_hdl(struct oid_par_priv
 				 r8712_efuse_get_current_size(Adapter);
 	r8712_efuse_reg_uninit(Adapter);
 	*poid_par_priv->bytes_rw = poid_par_priv->information_buf_len;
-	return status;
+	return RNDIS_STATUS_SUCCESS;
 }
 
 uint oid_rt_get_efuse_max_size_hdl(struct oid_par_priv *poid_par_priv)
 {
 	struct _adapter *Adapter = (struct _adapter *)
 				   (poid_par_priv->adapter_context);
-	uint status = RNDIS_STATUS_SUCCESS;
 
 	if (poid_par_priv->type_of_oid != QUERY_OID)
 		return RNDIS_STATUS_NOT_ACCEPTED;
@@ -1270,7 +1255,7 @@ uint oid_rt_get_efuse_max_size_hdl(struct oid_par_priv *poid_par_priv)
 	*(int *)poid_par_priv->information_buf =
 					 r8712_efuse_get_max_size(Adapter);
 	*poid_par_priv->bytes_rw = poid_par_priv->information_buf_len;
-	return status;
+	return RNDIS_STATUS_SUCCESS;
 }
 
 uint oid_rt_pro_efuse_hdl(struct oid_par_priv *poid_par_priv)
@@ -1320,7 +1305,6 @@ uint oid_rt_set_bandwidth_hdl(struct oid_par_priv *poid_par_priv)
 {
 	struct _adapter *Adapter = (struct _adapter *)
 				   (poid_par_priv->adapter_context);
-	uint status = RNDIS_STATUS_SUCCESS;
 	u32		bandwidth;
 
 	if (poid_par_priv->type_of_oid != SET_OID)
@@ -1332,14 +1316,13 @@ uint oid_rt_set_bandwidth_hdl(struct oid_par_priv *poid_par_priv)
 		bandwidth = HT_CHANNEL_WIDTH_40;
 	Adapter->mppriv.curr_bandwidth = (u8)bandwidth;
 	r8712_SwitchBandwidth(Adapter);
-	return status;
+	return RNDIS_STATUS_SUCCESS;
 }
 
 uint oid_rt_set_crystal_cap_hdl(struct oid_par_priv *poid_par_priv)
 {
 	struct _adapter *Adapter = (struct _adapter *)
 				   (poid_par_priv->adapter_context);
-	uint status = RNDIS_STATUS_SUCCESS;
 	u32		crystal_cap = 0;
 
 	if (poid_par_priv->type_of_oid != SET_OID)
@@ -1351,7 +1334,7 @@ uint oid_rt_set_crystal_cap_hdl(struct oid_par_priv *poid_par_priv)
 		return RNDIS_STATUS_NOT_ACCEPTED;
 	Adapter->mppriv.curr_crystalcap = crystal_cap;
 	r8712_SetCrystalCap(Adapter);
-	return status;
+	return RNDIS_STATUS_SUCCESS;
 }
 
 uint oid_rt_set_rx_packet_type_hdl(struct oid_par_priv

drivers/staging/rtl8712/rtl871x_recv.c

@@ -605,8 +605,6 @@ sint r8712_wlanhdr_to_ethhdr(union recv_frame *precvframe)
 	u8	bsnaphdr;
 	u8	*psnap_type;
 	struct ieee80211_snap_hdr *psnap;
-
-	sint ret = _SUCCESS;
 	struct _adapter	*adapter = precvframe->u.hdr.adapter;
 	struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
 
@@ -653,7 +651,7 @@ sint r8712_wlanhdr_to_ethhdr(union recv_frame *precvframe)
 		len = htons(len);
 		memcpy(ptr + 12, &len, 2);
 	}
-	return ret;
+	return _SUCCESS;
 }
 
 s32 r8712_recv_entry(union recv_frame *precvframe)