Re: [PATCH 8/8] staging: vt6655: Remove useless return variables

[walter harms]

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@xxxxxxxxx>
> 
> ---
>  drivers/staging/vt6655/hostap.c |   10 ++++------
>  drivers/staging/vt6655/wpactl.c |   19 ++++++-------------
>  2 files changed, 10 insertions(+), 19 deletions(-)
> 
> diff --git a/drivers/staging/vt6655/hostap.c b/drivers/staging/vt6655/hostap.c
> index f55d0fb..317c2a8 100644
> --- a/drivers/staging/vt6655/hostap.c
> +++ b/drivers/staging/vt6655/hostap.c
> @@ -421,7 +421,6 @@ static int hostap_set_encryption(PSDevice pDevice,
>  	unsigned char abySeq[MAX_KEY_LEN];
>  	unsigned long long KeyRSC;
>  	unsigned char byKeyDecMode = KEY_CTL_WEP;
> -	int     ret = 0;
>  	int     iNodeIndex = -1;
>  	int     ii;
>  	bool bKeyTableFull = false;
> @@ -475,7 +474,7 @@ static int hostap_set_encryption(PSDevice pDevice,
>  		       MAX_KEY_LEN
>  );
>  
> -		return ret;
> +		return 0;
>  	}
>  
>  	memcpy(abyKey, param->u.crypt.key, param->u.crypt.key_len);
> @@ -531,7 +530,7 @@ static int hostap_set_encryption(PSDevice pDevice,
>  		pMgmt->byCSSGK = KEY_CTL_WEP;
>  		pMgmt->sNodeDBTable[iNodeIndex].byCipherSuite = KEY_CTL_WEP;
>  		pMgmt->sNodeDBTable[iNodeIndex].dwKeyIndex = dwKeyIndex;
> -		return ret;
> +		return 0;
>  	}
>  
>  	if (param->u.crypt.seq) {
> @@ -622,7 +621,7 @@ static int hostap_set_encryption(PSDevice pDevice,
>  	pMgmt->sNodeDBTable[iNodeIndex].dwTSC47_16 = 0;
>  	pMgmt->sNodeDBTable[iNodeIndex].wTSC15_0 = 0;
>  
> -	return ret;
> +	return 0;
>  }
>  
>  /*
> @@ -643,7 +642,6 @@ static int hostap_get_encryption(PSDevice pDevice,
>  				 int param_len)
>  {
>  	PSMgmtObject    pMgmt = pDevice->pMgmt;
> -	int     ret = 0;
>  	int     ii;
>  	int     iNodeIndex = 0;
>  
> @@ -663,7 +661,7 @@ static int hostap_get_encryption(PSDevice pDevice,
>  	for (ii = 0; ii < 8; ii++)
>  		param->u.crypt.seq[ii] = (unsigned char)pMgmt->sNodeDBTable[iNodeIndex].KeyRSC >> (ii * 8);
>  
> -	return ret;
> +	return 0;
>  }
>  
>  /*
> diff --git a/drivers/staging/vt6655/wpactl.c b/drivers/staging/vt6655/wpactl.c
> index 089e8a7..8392d4d 100644
> --- a/drivers/staging/vt6655/wpactl.c
> +++ b/drivers/staging/vt6655/wpactl.c
> @@ -411,12 +411,11 @@ static int wpa_set_wpa(PSDevice pDevice,
>  		       struct viawget_wpa_param *param)
>  {
>  	PSMgmtObject    pMgmt = pDevice->pMgmt;
> -	int ret = 0;
>  
>  	pMgmt->eAuthenMode = WMAC_AUTH_OPEN;
>  	pMgmt->bShareKeyAlgorithm = false;
>  
> -	return ret;
> +	return 0;
>  }

perhaps this can be void ?


>  
>  /*
> @@ -437,7 +436,6 @@ static int wpa_set_disassociate(PSDevice pDevice,
>  				struct viawget_wpa_param *param)
>  {
>  	PSMgmtObject    pMgmt = pDevice->pMgmt;
> -	int ret = 0;
>  
>  	spin_lock_irq(&pDevice->lock);
>  	if (pDevice->bLinkPass) {
> @@ -446,7 +444,7 @@ static int wpa_set_disassociate(PSDevice pDevice,
>  	}
>  	spin_unlock_irq(&pDevice->lock);
>  
> -	return ret;
> +	return 0;
>  }
>  
>  /*
> @@ -466,14 +464,12 @@ static int wpa_set_disassociate(PSDevice pDevice,
>  static int wpa_set_scan(PSDevice pDevice,
>  			struct viawget_wpa_param *param)
>  {
> -	int ret = 0;
> -
>  	spin_lock_irq(&pDevice->lock);
>  	BSSvClearBSSList((void *)pDevice, pDevice->bLinkPass);
>  	bScheduleCommand((void *)pDevice, WLAN_CMD_BSSID_SCAN, NULL);
>  	spin_unlock_irq(&pDevice->lock);
>  
> -	return ret;
> +	return 0;
>  }

This could be void ?


>  /*
> @@ -494,11 +490,10 @@ static int wpa_get_bssid(PSDevice pDevice,
>  			 struct viawget_wpa_param *param)
>  {
>  	PSMgmtObject        pMgmt = pDevice->pMgmt;
> -	int ret = 0;
>  
>  	memcpy(param->u.wpa_associate.bssid, pMgmt->abyCurrBSSID , 6);
>  
> -	return ret;
> +	return 0;
>  }


this could be void

>  
>  /*
> @@ -520,14 +515,13 @@ static int wpa_get_ssid(PSDevice pDevice,
>  {
>  	PSMgmtObject        pMgmt = pDevice->pMgmt;
>  	PWLAN_IE_SSID       pItemSSID;
> -	int ret = 0;
>  
>  	pItemSSID = (PWLAN_IE_SSID)pMgmt->abyCurrSSID;
>  
>  	memcpy(param->u.wpa_associate.ssid, pItemSSID->abySSID , pItemSSID->len);
>  	param->u.wpa_associate.ssid_len = pItemSSID->len;
>  
> -	return ret;
> +	return 0;
>  }



also void ?

>  /*
> @@ -668,7 +662,6 @@ static int wpa_set_associate(PSDevice pDevice,
>  	PWLAN_IE_SSID   pItemSSID;
>  	unsigned char abyNullAddr[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
>  	unsigned char abyWPAIE[64];
> -	int ret = 0;
>  	bool bWepEnabled = false;
>  
>  	// set key type & algorithm
> @@ -788,7 +781,7 @@ static int wpa_set_associate(PSDevice pDevice,
>  	bScheduleCommand((void *)pDevice, WLAN_CMD_SSID, NULL);
>  	spin_unlock_irq(&pDevice->lock);
>  
> -	return ret;
> +	return 0;
>  }
>  
>  /*
> 
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