[PATCH 1/8] staging: r8712u: Remove useless return variables

Peter Senna Tschudin
2014-05-20T10:33:41Z

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>

---
drivers/staging/rtl8712/ieee80211.c | 8 ++--
drivers/staging/rtl8712/rtl8712_cmd.c | 3 -
drivers/staging/rtl8712/rtl8712_recv.c | 7 +---
drivers/staging/rtl8712/rtl871x_mlme.c | 3 -
drivers/staging/rtl8712/rtl871x_mp.c | 3 -
drivers/staging/rtl8712/rtl871x_mp_ioctl.c | 49 +++++++++--------------------
drivers/staging/rtl8712/rtl871x_recv.c | 4 --
7 files changed, 26 insertions(+), 51 deletions(-)

diff --git a/drivers/staging/rtl8712/ieee80211.c b/drivers/staging/rtl8712/ieee80211.c
index 57fef70..fe9459e 100644
--- a/drivers/staging/rtl8712/ieee80211.c
+++ b/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,
diff --git a/drivers/staging/rtl8712/rtl8712_cmd.c b/drivers/staging/rtl8712/rtl8712_cmd.c
index 1a4b7a6..8ca7d7e 100644
--- a/drivers/staging/rtl8712/rtl8712_cmd.c
+++ b/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)
diff --git a/drivers/staging/rtl8712/rtl8712_recv.c b/drivers/staging/rtl8712/rtl8712_recv.c
index 0723b2f..667398a 100644
--- a/drivers/staging/rtl8712/rtl8712_recv.c
+++ b/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)
diff --git a/drivers/staging/rtl8712/rtl871x_mlme.c b/drivers/staging/rtl8712/rtl871x_mlme.c
index 3ea99ae..05d6e65 100644
--- a/drivers/staging/rtl8712/rtl871x_mlme.c
+++ b/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,
diff --git a/drivers/staging/rtl8712/rtl871x_mp.c b/drivers/staging/rtl8712/rtl871x_mp.c
index 0563318..5fd60cd 100644
--- a/drivers/staging/rtl8712/rtl871x_mp.c
+++ b/drivers/staging/rtl8712/rtl871x_mp.c
@@ -80,9 +80,8 @@ _exit_init_mp_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)
diff --git a/drivers/staging/rtl8712/rtl871x_mp_ioctl.c b/drivers/staging/rtl8712/rtl871x_mp_ioctl.c
index 5bd4296..9827ff8 100644
--- a/drivers/staging/rtl8712/rtl871x_mp_ioctl.c
+++ b/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
diff --git a/drivers/staging/rtl8712/rtl871x_recv.c b/drivers/staging/rtl8712/rtl871x_recv.c
index 274c359..4ac4a1b 100644
--- a/drivers/staging/rtl8712/rtl871x_recv.c
+++ b/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)