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

walter harms
2014-05-20T11:14:07Z

Am 20.05.2014 12:33, schrieb Peter Senna Tschudin:
> 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;
> }
>

Is this function still needed ?

> 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;
> }

Is this function realy needed and why must it return int ?

> 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)
>
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