staging: rtl8188eu: Replace x==NULL by !x

Replace x==NULL by !x, to fix the checkpatch issue
comparsion with NULL could be written as !x.
Signed-off-by: Gargi Sharma <gs051095@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/core/rtw_mlme.c

@@ -55,7 +55,7 @@ int rtw_init_mlme_priv(struct adapter *padapter)
 
 	pbuf = vzalloc(MAX_BSS_CNT * (sizeof(struct wlan_network)));
 
-	if (pbuf == NULL) {
+	if (!pbuf) {
 		res = _FAIL;
 		goto exit;
 	}
@@ -147,7 +147,7 @@ static void _rtw_free_network(struct mlme_priv *pmlmepriv, struct wlan_network *
 	u32 lifetime = SCANQUEUE_LIFETIME;
 	struct __queue *free_queue = &(pmlmepriv->free_bss_pool);
 
-	if (pnetwork == NULL)
+	if (!pnetwork)
 		return;
 
 	if (pnetwork->fixed)
@@ -171,7 +171,7 @@ void _rtw_free_network_nolock(struct	mlme_priv *pmlmepriv, struct wlan_network *
 {
 	struct __queue *free_queue = &(pmlmepriv->free_bss_pool);
 
-	if (pnetwork == NULL)
+	if (!pnetwork)
 		return;
 	if (pnetwork->fixed)
 		return;
@@ -346,7 +346,7 @@ struct	wlan_network	*rtw_get_oldest_wlan_network(struct __queue *scanned_queue)
 		pwlan = container_of(plist, struct wlan_network, list);
 
 		if (!pwlan->fixed) {
-			if (oldest == NULL || time_after(oldest->last_scanned, pwlan->last_scanned))
+			if (!oldest || time_after(oldest->last_scanned, pwlan->last_scanned))
 				oldest = pwlan;
 		}
 	}
@@ -457,7 +457,7 @@ void rtw_update_scanned_network(struct adapter *adapter, struct wlan_bssid_ex *t
 
 			pnetwork = rtw_alloc_network(pmlmepriv); /*  will update scan_time */
 
-			if (pnetwork == NULL) {
+			if (!pnetwork) {
 				RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_, ("\n\n\nsomething wrong here\n\n\n"));
 				goto exit;
 			}
@@ -526,7 +526,7 @@ static int rtw_is_desired_network(struct adapter *adapter, struct wlan_network *
 	privacy = pnetwork->network.Privacy;
 
 	if (check_fwstate(pmlmepriv, WIFI_UNDER_WPS)) {
-		if (rtw_get_wps_ie(pnetwork->network.IEs+_FIXED_IE_LENGTH_, pnetwork->network.IELength-_FIXED_IE_LENGTH_, NULL, &wps_ielen) != NULL)
+		if (!rtw_get_wps_ie(pnetwork->network.IEs+_FIXED_IE_LENGTH_, pnetwork->network.IELength-_FIXED_IE_LENGTH_, NULL, &wps_ielen))
 			return true;
 		else
 			return false;
@@ -876,7 +876,7 @@ static struct sta_info *rtw_joinbss_update_stainfo(struct adapter *padapter, str
 	struct sta_priv *pstapriv = &padapter->stapriv;
 
 	psta = rtw_get_stainfo(pstapriv, pnetwork->network.MacAddress);
-	if (psta == NULL)
+	if (!psta)
 		psta = rtw_alloc_stainfo(pstapriv, pnetwork->network.MacAddress);
 
 	if (psta) { /* update ptarget_sta */
@@ -1074,7 +1074,7 @@ void rtw_joinbss_event_prehandle(struct adapter *adapter, u8 *pbuf)
 			/* s3. find ptarget_sta & update ptarget_sta after update cur_network only for station mode */
 			if (check_fwstate(pmlmepriv, WIFI_STATION_STATE) == true) {
 				ptarget_sta = rtw_joinbss_update_stainfo(adapter, pnetwork);
-				if (ptarget_sta == NULL) {
+				if (!ptarget_sta) {
 					RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_, ("Can't update stainfo when joinbss_event callback\n"));
 					spin_unlock_bh(&pmlmepriv->scanned_queue.lock);
 					goto ignore_joinbss_callback;
@@ -1144,7 +1144,7 @@ static u8 search_max_mac_id(struct adapter *padapter)
 #if defined(CONFIG_88EU_AP_MODE)
 	if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
 		for (aid = (pstapriv->max_num_sta); aid > 0; aid--) {
-			if (pstapriv->sta_aid[aid-1] != NULL)
+			if (!pstapriv->sta_aid[aid-1])
 				break;
 		}
 		mac_id = aid + 1;
@@ -1165,7 +1165,7 @@ void rtw_stassoc_hw_rpt(struct adapter *adapter, struct sta_info *psta)
 	u16 media_status;
 	u8 macid;
 
-	if (psta == NULL)
+	if (!psta)
 		return;
 
 	macid = search_max_mac_id(adapter);
@@ -1197,13 +1197,13 @@ void rtw_stassoc_event_callback(struct adapter *adapter, u8 *pbuf)
 #endif
 	/* for AD-HOC mode */
 	psta = rtw_get_stainfo(&adapter->stapriv, pstassoc->macaddr);
-	if (psta != NULL) {
+	if (!psta) {
 		/* the sta have been in sta_info_queue => do nothing */
 		RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_, ("Error: rtw_stassoc_event_callback: sta has been in sta_hash_queue\n"));
 		return; /* between drv has received this event before and  fw have not yet to set key to CAM_ENTRY) */
 	}
 	psta = rtw_alloc_stainfo(&adapter->stapriv, pstassoc->macaddr);
-	if (psta == NULL) {
+	if (!psta) {
 		RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_, ("Can't alloc sta_info when rtw_stassoc_event_callback\n"));
 		return;
 	}
@@ -1520,7 +1520,7 @@ int rtw_select_and_join_from_scanned_queue(struct mlme_priv *pmlmepriv)
 		pmlmepriv->pscanned = pmlmepriv->pscanned->next;
 		rtw_check_join_candidate(pmlmepriv, &candidate, pnetwork);
 	}
-	if (candidate == NULL) {
+	if (!candidate) {
 		DBG_88E("%s: return _FAIL(candidate==NULL)\n", __func__);
 		ret = _FAIL;
 		goto exit;
@@ -2064,7 +2064,7 @@ void rtw_issue_addbareq_cmd(struct adapter *padapter, struct xmit_frame *pxmitfr
 	else
 		psta = rtw_get_stainfo(&padapter->stapriv, pattrib->ra);
 
-	if (psta == NULL)
+	if (!psta)
 		return;
 
 	phtpriv = &psta->htpriv;
@@ -2096,7 +2096,7 @@ void _rtw_roaming(struct adapter *padapter, struct wlan_network *tgt_network)
 
 	struct wlan_network *pnetwork;
 
-	if (tgt_network != NULL)
+	if (!tgt_network)
 		pnetwork = tgt_network;
 	else
 		pnetwork = &pmlmepriv->cur_network;