Staging: rtl8188eu: ioctl_linux: Clean up if function returned NULL on failure.

Clean some all functions to return NULL on failure.
Used !x instead of x==NULL.
Signed-off-by: Amit Ghadge <amitg.b14@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/os_dep/ioctl_linux.c

@@ -403,7 +403,7 @@ static int wpa_set_encryption(struct net_device *dev, struct ieee_param *param,
 			wep_key_len = wep_key_len <= 5 ? 5 : 13;
 			wep_total_len = wep_key_len + offsetof(struct ndis_802_11_wep, KeyMaterial);
 			pwep = (struct ndis_802_11_wep *)rtw_malloc(wep_total_len);
-			if (pwep == NULL) {
+			if (!pwep) {
 				RT_TRACE(_module_rtl871x_ioctl_os_c, _drv_err_, (" wpa_set_encryption: pwep allocate fail !!!\n"));
 				goto exit;
 			}
@@ -444,7 +444,7 @@ static int wpa_set_encryption(struct net_device *dev, struct ieee_param *param,
 
 		if (check_fwstate(pmlmepriv, WIFI_STATION_STATE | WIFI_MP_STATE)) { /* sta mode */
 			psta = rtw_get_stainfo(pstapriv, get_bssid(pmlmepriv));
-			if (psta == NULL) {
+			if (!psta) {
 				;
 			} else {
 				if (strcmp(param->u.crypt.alg, "none") != 0)
@@ -479,7 +479,7 @@ static int wpa_set_encryption(struct net_device *dev, struct ieee_param *param,
 				}
 			}
 			pbcmc_sta = rtw_get_bcmc_stainfo(padapter);
-			if (pbcmc_sta == NULL) {
+			if (!pbcmc_sta) {
 				;
 			} else {
 				/* Jeff: don't disable ieee8021x_blocked while clearing key */
@@ -505,9 +505,9 @@ static int rtw_set_wpa_ie(struct adapter *padapter, char *pie, unsigned short ie
 	int group_cipher = 0, pairwise_cipher = 0;
 	int ret = 0;
 
-	if ((ielen > MAX_WPA_IE_LEN) || (pie == NULL)) {
+	if ((ielen > MAX_WPA_IE_LEN) || (!pie)) {
 		_clr_fwstate_(&padapter->mlmepriv, WIFI_UNDER_WPS);
-		if (pie == NULL)
+		if (!pie)
 			return ret;
 		else
 			return -EINVAL;
@@ -515,7 +515,7 @@ static int rtw_set_wpa_ie(struct adapter *padapter, char *pie, unsigned short ie
 
 	if (ielen) {
 		buf = kmemdup(pie, ielen, GFP_KERNEL);
-		if (buf == NULL) {
+		if (!buf) {
 			ret =  -ENOMEM;
 			goto exit;
 		}
@@ -1052,7 +1052,7 @@ static int rtw_wx_set_mlme(struct net_device *dev,
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(dev);
 	struct iw_mlme *mlme = (struct iw_mlme *)extra;
 
-	if (mlme == NULL)
+	if (!mlme)
 		return -1;
 
 	DBG_88E("%s\n", __func__);
@@ -1899,7 +1899,7 @@ static int rtw_wx_set_enc_ext(struct net_device *dev,
 
 	param_len = sizeof(struct ieee_param) + pext->key_len;
 	param = (struct ieee_param *)rtw_malloc(param_len);
-	if (param == NULL)
+	if (!param)
 		return -1;
 
 	memset(param, 0, param_len);
@@ -2064,7 +2064,7 @@ static int wpa_supplicant_ioctl(struct net_device *dev, struct iw_point *p)
 	}
 
 	param = (struct ieee_param *)rtw_malloc(p->length);
-	if (param == NULL) {
+	if (!param) {
 		ret = -ENOMEM;
 		goto out;
 	}
@@ -2257,13 +2257,13 @@ static int rtw_set_encryption(struct net_device *dev, struct ieee_param *param,
 		}
 	}
 
-	if (strcmp(param->u.crypt.alg, "none") == 0 && (psta == NULL)) {
+	if (strcmp(param->u.crypt.alg, "none") == 0 && (!psta)) {
 		/* todo:clear default encryption keys */
 
 		DBG_88E("clear default encryption keys, keyid =%d\n", param->u.crypt.idx);
 		goto exit;
 	}
-	if (strcmp(param->u.crypt.alg, "WEP") == 0 && (psta == NULL)) {
+	if (strcmp(param->u.crypt.alg, "WEP") == 0 && (!psta)) {
 		DBG_88E("r871x_set_encryption, crypt.alg = WEP\n");
 		wep_key_idx = param->u.crypt.idx;
 		wep_key_len = param->u.crypt.key_len;
@@ -2277,7 +2277,7 @@ static int rtw_set_encryption(struct net_device *dev, struct ieee_param *param,
 			wep_key_len = wep_key_len <= 5 ? 5 : 13;
 			wep_total_len = wep_key_len + offsetof(struct ndis_802_11_wep, KeyMaterial);
 			pwep = (struct ndis_802_11_wep *)rtw_malloc(wep_total_len);
-			if (pwep == NULL) {
+			if (!pwep) {
 				DBG_88E(" r871x_set_encryption: pwep allocate fail !!!\n");
 				goto exit;
 			}
@@ -2704,7 +2704,7 @@ static int rtw_set_wps_beacon(struct net_device *dev, struct ieee_param *param,
 	if (ie_len > 0) {
 		pmlmepriv->wps_beacon_ie = rtw_malloc(ie_len);
 		pmlmepriv->wps_beacon_ie_len = ie_len;
-		if (pmlmepriv->wps_beacon_ie == NULL) {
+		if (!pmlmepriv->wps_beacon_ie) {
 			DBG_88E("%s()-%d: rtw_malloc() ERROR!\n", __func__, __LINE__);
 			return -EINVAL;
 		}
@@ -2739,7 +2739,7 @@ static int rtw_set_wps_probe_resp(struct net_device *dev, struct ieee_param *par
 	if (ie_len > 0) {
 		pmlmepriv->wps_probe_resp_ie = rtw_malloc(ie_len);
 		pmlmepriv->wps_probe_resp_ie_len = ie_len;
-		if (pmlmepriv->wps_probe_resp_ie == NULL) {
+		if (!pmlmepriv->wps_probe_resp_ie) {
 			DBG_88E("%s()-%d: rtw_malloc() ERROR!\n", __func__, __LINE__);
 			return -EINVAL;
 		}
@@ -2769,7 +2769,7 @@ static int rtw_set_wps_assoc_resp(struct net_device *dev, struct ieee_param *par
 	if (ie_len > 0) {
 		pmlmepriv->wps_assoc_resp_ie = rtw_malloc(ie_len);
 		pmlmepriv->wps_assoc_resp_ie_len = ie_len;
-		if (pmlmepriv->wps_assoc_resp_ie == NULL) {
+		if (!pmlmepriv->wps_assoc_resp_ie) {
 			DBG_88E("%s()-%d: rtw_malloc() ERROR!\n", __func__, __LINE__);
 			return -EINVAL;
 		}
@@ -2871,7 +2871,7 @@ static int rtw_hostapd_ioctl(struct net_device *dev, struct iw_point *p)
 	}
 
 	param = (struct ieee_param *)rtw_malloc(p->length);
-	if (param == NULL) {
+	if (!param) {
 		ret = -ENOMEM;
 		goto out;
 	}
@@ -2981,7 +2981,7 @@ static int rtw_wx_set_priv(struct net_device *dev,
 			pmlmepriv->wps_probe_req_ie = NULL;
 
 			pmlmepriv->wps_probe_req_ie = rtw_malloc(cp_sz);
-			if (pmlmepriv->wps_probe_req_ie == NULL) {
+			if (!pmlmepriv->wps_probe_req_ie) {
 				pr_info("%s()-%d: rtw_malloc() ERROR!\n", __func__, __LINE__);
 				ret =  -EINVAL;
 				goto FREE_EXT;