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Date:   Sun, 8 Oct 2017 01:33:55 +0530
From:   Srishti Sharma <srishtishar@...il.com>
To:     Julia Lawall <julia.lawall@...6.fr>
Cc:     Greg KH <gregkh@...uxfoundation.org>, devel@...verdev.osuosl.org,
        Linux kernel mailing list <linux-kernel@...r.kernel.org>,
        outreachy-kernel <outreachy-kernel@...glegroups.com>
Subject: Re: [Outreachy kernel] [PATCH] Staging: rtl8723bs: core: rtw_cmd:
 Remove cast to pointer types in kfree

On Sat, Oct 7, 2017 at 11:42 PM, Julia Lawall <julia.lawall@...6.fr> wrote:
>
>
> On Sat, 7 Oct 2017, Srishti Sharma wrote:
>
>> The cast to pointer types in kfree is not needed and can be dropped.
>> Done using the following semantic by coccinelle.
>>
>> @r@
>> type T,P;
>> T* x;
>> @@
>>
>> kfree(
>> -(P *)
>> x )
>>
>> Signed-off-by: Srishti Sharma <srishtishar@...il.com>
>> ---
>>  drivers/staging/rtl8723bs/core/rtw_cmd.c | 58 ++++++++++++++++----------------
>>  1 file changed, 29 insertions(+), 29 deletions(-)
>>
>> diff --git a/drivers/staging/rtl8723bs/core/rtw_cmd.c b/drivers/staging/rtl8723bs/core/rtw_cmd.c
>> index 1843c44..e71e3ab 100644
>> --- a/drivers/staging/rtl8723bs/core/rtw_cmd.c
>> +++ b/drivers/staging/rtl8723bs/core/rtw_cmd.c
>> @@ -408,7 +408,7 @@ void rtw_free_cmd_obj(struct cmd_obj *pcmd)
>>       }
>>
>>       /* free cmd_obj */
>> -     kfree((unsigned char *)pcmd);
>> +     kfree(pcmd);
>>  }
>>
>>
>> @@ -619,7 +619,7 @@ u8 rtw_sitesurvey_cmd(struct adapter  *padapter, struct ndis_802_11_ssid *ssid,
>>
>>       psurveyPara = rtw_zmalloc(sizeof(struct sitesurvey_parm));
>>       if (psurveyPara == NULL) {
>> -             kfree((unsigned char *) ph2c);
>> +             kfree(ph2c);
>>               return _FAIL;
>>       }
>>
>> @@ -689,7 +689,7 @@ u8 rtw_setdatarate_cmd(struct adapter *padapter, u8 *rateset)
>>
>>       pbsetdataratepara = rtw_zmalloc(sizeof(struct setdatarate_parm));
>>       if (pbsetdataratepara == NULL) {
>> -             kfree((u8 *) ph2c);
>> +             kfree(ph2c);
>>               res = _FAIL;
>>               goto exit;
>>       }
>> @@ -707,7 +707,7 @@ void rtw_getbbrfreg_cmdrsp_callback(struct adapter *padapter,  struct cmd_obj *p
>>  {
>>       /* rtw_free_cmd_obj(pcmd); */
>>       kfree((unsigned char *) pcmd->parmbuf);
>
> This case didn't get updated, probably because Coccinelle didn't have
> access to enough type information.  Try rerunning with --all-includes or
> --recursive-includes.  You may also need to give some include path
> information (-I argument).
I tried doing this but it is still not detecting this particular case,
for the include path I gave the path of the directory which contains
the header file in which struct cmd_obj is defined.

Regards,
Srishti
>
> julia
>
>> -     kfree((unsigned char *) pcmd);
>> +     kfree(pcmd);
>>  }
>>
>>  u8 rtw_createbss_cmd(struct adapter  *padapter)
>> @@ -847,7 +847,7 @@ u8 rtw_joinbss_cmd(struct adapter  *padapter, struct wlan_network *pnetwork)
>>       psecnetwork = (struct wlan_bssid_ex *)&psecuritypriv->sec_bss;
>>       if (psecnetwork == NULL) {
>>               if (pcmd != NULL)
>> -                     kfree((unsigned char *)pcmd);
>> +                     kfree(pcmd);
>>
>>               res = _FAIL;
>>
>> @@ -955,7 +955,7 @@ u8 rtw_disassoc_cmd(struct adapter *padapter, u32 deauth_timeout_ms, bool enqueu
>>               cmdobj = rtw_zmalloc(sizeof(*cmdobj));
>>               if (cmdobj == NULL) {
>>                       res = _FAIL;
>> -                     kfree((u8 *)param);
>> +                     kfree(param);
>>                       goto exit;
>>               }
>>               init_h2fwcmd_w_parm_no_rsp(cmdobj, param, _DisConnect_CMD_);
>> @@ -964,7 +964,7 @@ u8 rtw_disassoc_cmd(struct adapter *padapter, u32 deauth_timeout_ms, bool enqueu
>>               /* no need to enqueue, do the cmd hdl directly and free cmd parameter */
>>               if (H2C_SUCCESS != disconnect_hdl(padapter, (u8 *)param))
>>                       res = _FAIL;
>> -             kfree((u8 *)param);
>> +             kfree(param);
>>       }
>>
>>  exit:
>> @@ -990,7 +990,7 @@ u8 rtw_setopmode_cmd(struct adapter  *padapter, enum NDIS_802_11_NETWORK_INFRAST
>>       if (enqueue) {
>>               ph2c = rtw_zmalloc(sizeof(struct cmd_obj));
>>               if (ph2c == NULL) {
>> -                     kfree((u8 *)psetop);
>> +                     kfree(psetop);
>>                       res = _FAIL;
>>                       goto exit;
>>               }
>> @@ -999,7 +999,7 @@ u8 rtw_setopmode_cmd(struct adapter  *padapter, enum NDIS_802_11_NETWORK_INFRAST
>>               res = rtw_enqueue_cmd(pcmdpriv, ph2c);
>>       } else{
>>               setopmode_hdl(padapter, (u8 *)psetop);
>> -             kfree((u8 *)psetop);
>> +             kfree(psetop);
>>       }
>>  exit:
>>       return res;
>> @@ -1042,15 +1042,15 @@ u8 rtw_setstakey_cmd(struct adapter *padapter, struct sta_info *sta, u8 unicast_
>>       if (enqueue) {
>>               ph2c = rtw_zmalloc(sizeof(struct cmd_obj));
>>               if (ph2c == NULL) {
>> -                     kfree((u8 *) psetstakey_para);
>> +                     kfree(psetstakey_para);
>>                       res = _FAIL;
>>                       goto exit;
>>               }
>>
>>               psetstakey_rsp = rtw_zmalloc(sizeof(struct set_stakey_rsp));
>>               if (psetstakey_rsp == NULL) {
>> -                     kfree((u8 *) ph2c);
>> -                     kfree((u8 *) psetstakey_para);
>> +                     kfree(ph2c);
>> +                     kfree(psetstakey_para);
>>                       res = _FAIL;
>>                       goto exit;
>>               }
>> @@ -1061,7 +1061,7 @@ u8 rtw_setstakey_cmd(struct adapter *padapter, struct sta_info *sta, u8 unicast_
>>               res = rtw_enqueue_cmd(pcmdpriv, ph2c);
>>       } else{
>>               set_stakey_hdl(padapter, (u8 *)psetstakey_para);
>> -             kfree((u8 *) psetstakey_para);
>> +             kfree(psetstakey_para);
>>       }
>>  exit:
>>       return res;
>> @@ -1091,15 +1091,15 @@ u8 rtw_clearstakey_cmd(struct adapter *padapter, struct sta_info *sta, u8 enqueu
>>
>>               psetstakey_para = rtw_zmalloc(sizeof(struct set_stakey_parm));
>>               if (psetstakey_para == NULL) {
>> -                     kfree((u8 *) ph2c);
>> +                     kfree(ph2c);
>>                       res = _FAIL;
>>                       goto exit;
>>               }
>>
>>               psetstakey_rsp = rtw_zmalloc(sizeof(struct set_stakey_rsp));
>>               if (psetstakey_rsp == NULL) {
>> -                     kfree((u8 *) ph2c);
>> -                     kfree((u8 *) psetstakey_para);
>> +                     kfree(ph2c);
>> +                     kfree(psetstakey_para);
>>                       res = _FAIL;
>>                       goto exit;
>>               }
>> @@ -1136,7 +1136,7 @@ u8 rtw_addbareq_cmd(struct adapter *padapter, u8 tid, u8 *addr)
>>
>>       paddbareq_parm = rtw_zmalloc(sizeof(struct addBaReq_parm));
>>       if (paddbareq_parm == NULL) {
>> -             kfree((unsigned char *)ph2c);
>> +             kfree(ph2c);
>>               res = _FAIL;
>>               goto exit;
>>       }
>> @@ -1170,7 +1170,7 @@ u8 rtw_reset_securitypriv_cmd(struct adapter *padapter)
>>
>>       pdrvextra_cmd_parm = rtw_zmalloc(sizeof(struct drvextra_cmd_parm));
>>       if (pdrvextra_cmd_parm == NULL) {
>> -             kfree((unsigned char *)ph2c);
>> +             kfree(ph2c);
>>               res = _FAIL;
>>               goto exit;
>>       }
>> @@ -1205,7 +1205,7 @@ u8 rtw_free_assoc_resources_cmd(struct adapter *padapter)
>>
>>       pdrvextra_cmd_parm = rtw_zmalloc(sizeof(struct drvextra_cmd_parm));
>>       if (pdrvextra_cmd_parm == NULL) {
>> -             kfree((unsigned char *)ph2c);
>> +             kfree(ph2c);
>>               res = _FAIL;
>>               goto exit;
>>       }
>> @@ -1241,7 +1241,7 @@ u8 rtw_dynamic_chk_wk_cmd(struct adapter *padapter)
>>
>>       pdrvextra_cmd_parm = rtw_zmalloc(sizeof(struct drvextra_cmd_parm));
>>       if (pdrvextra_cmd_parm == NULL) {
>> -             kfree((unsigned char *)ph2c);
>> +             kfree(ph2c);
>>               res = _FAIL;
>>               goto exit;
>>       }
>> @@ -1294,7 +1294,7 @@ u8 rtw_set_chplan_cmd(struct adapter *padapter, u8 chplan, u8 enqueue, u8 swconf
>>               /* need enqueue, prepare cmd_obj and enqueue */
>>               pcmdobj = rtw_zmalloc(sizeof(struct cmd_obj));
>>               if (pcmdobj == NULL) {
>> -                     kfree((u8 *)setChannelPlan_param);
>> +                     kfree(setChannelPlan_param);
>>                       res = _FAIL;
>>                       goto exit;
>>               }
>> @@ -1306,7 +1306,7 @@ u8 rtw_set_chplan_cmd(struct adapter *padapter, u8 chplan, u8 enqueue, u8 swconf
>>               if (H2C_SUCCESS != set_chplan_hdl(padapter, (unsigned char *)setChannelPlan_param))
>>                       res = _FAIL;
>>
>> -             kfree((u8 *)setChannelPlan_param);
>> +             kfree(setChannelPlan_param);
>>       }
>>
>>       /* do something based on res... */
>> @@ -1561,7 +1561,7 @@ u8 rtw_lps_ctrl_wk_cmd(struct adapter *padapter, u8 lps_ctrl_type, u8 enqueue)
>>
>>               pdrvextra_cmd_parm = rtw_zmalloc(sizeof(struct drvextra_cmd_parm));
>>               if (pdrvextra_cmd_parm == NULL) {
>> -                     kfree((unsigned char *)ph2c);
>> +                     kfree(ph2c);
>>                       res = _FAIL;
>>                       goto exit;
>>               }
>> @@ -1603,7 +1603,7 @@ u8 rtw_dm_in_lps_wk_cmd(struct adapter *padapter)
>>
>>       pdrvextra_cmd_parm = rtw_zmalloc(sizeof(struct drvextra_cmd_parm));
>>       if (pdrvextra_cmd_parm == NULL) {
>> -             kfree((unsigned char *)ph2c);
>> +             kfree(ph2c);
>>               res = _FAIL;
>>               goto exit;
>>       }
>> @@ -1676,7 +1676,7 @@ u8 rtw_dm_ra_mask_wk_cmd(struct adapter *padapter, u8 *psta)
>>
>>       pdrvextra_cmd_parm = rtw_zmalloc(sizeof(struct drvextra_cmd_parm));
>>       if (pdrvextra_cmd_parm == NULL) {
>> -             kfree((unsigned char *)ph2c);
>> +             kfree(ph2c);
>>               res = _FAIL;
>>               goto exit;
>>       }
>> @@ -1727,7 +1727,7 @@ u8 rtw_ps_cmd(struct adapter *padapter)
>>
>>       pdrvextra_cmd_parm = rtw_zmalloc(sizeof(struct drvextra_cmd_parm));
>>       if (pdrvextra_cmd_parm == NULL) {
>> -             kfree((unsigned char *)ppscmd);
>> +             kfree(ppscmd);
>>               res = _FAIL;
>>               goto exit;
>>       }
>> @@ -1799,7 +1799,7 @@ u8 rtw_chk_hi_queue_cmd(struct adapter *padapter)
>>
>>       pdrvextra_cmd_parm = rtw_zmalloc(sizeof(struct drvextra_cmd_parm));
>>       if (pdrvextra_cmd_parm == NULL) {
>> -             kfree((unsigned char *)ph2c);
>> +             kfree(ph2c);
>>               res = _FAIL;
>>               goto exit;
>>       }
>> @@ -1898,7 +1898,7 @@ u8 rtw_c2h_packet_wk_cmd(struct adapter *padapter, u8 *pbuf, u16 length)
>>
>>       pdrvextra_cmd_parm = rtw_zmalloc(sizeof(struct drvextra_cmd_parm));
>>       if (pdrvextra_cmd_parm == NULL) {
>> -             kfree((u8 *)ph2c);
>> +             kfree(ph2c);
>>               res = _FAIL;
>>               goto exit;
>>       }
>> @@ -1933,7 +1933,7 @@ u8 rtw_c2h_wk_cmd(struct adapter *padapter, u8 *c2h_evt)
>>
>>       pdrvextra_cmd_parm = rtw_zmalloc(sizeof(struct drvextra_cmd_parm));
>>       if (pdrvextra_cmd_parm == NULL) {
>> -             kfree((u8 *)ph2c);
>> +             kfree(ph2c);
>>               res = _FAIL;
>>               goto exit;
>>       }
>> --
>> 2.7.4
>>
>> --
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>>

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