staging: rtl8188eu: removes comparison to null

This patch fixes multiple comparison to NULL checkpatch errors by
rewriting the conditional as a negation.
Signed-off-by: Juliana Rodrigues <juliana.orod@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/core/rtw_cmd.c

@@ -47,7 +47,7 @@ static int _rtw_enqueue_cmd(struct __queue *queue, struct cmd_obj *obj)
 {
 	unsigned long irqL;
 
-	if (obj == NULL)
+	if (!obj)
 		goto exit;
 
 	spin_lock_irqsave(&queue->lock, irqL);
@@ -104,7 +104,7 @@ u32 rtw_enqueue_cmd(struct cmd_priv *pcmdpriv, struct cmd_obj *cmd_obj)
 	int res = _FAIL;
 	struct adapter *padapter = pcmdpriv->padapter;
 
-	if (cmd_obj == NULL)
+	if (!cmd_obj)
 		goto exit;
 
 	cmd_obj->padapter = padapter;
@@ -132,7 +132,7 @@ void rtw_free_cmd_obj(struct cmd_obj *pcmd)
 		kfree(pcmd->parmbuf);
 	}
 
-	if (pcmd->rsp != NULL) {
+	if (!pcmd->rsp) {
 		if (pcmd->rspsz != 0) {
 			/* free rsp in cmd_obj */
 			kfree(pcmd->rsp);
@@ -202,7 +202,7 @@ int rtw_cmd_thread(void *context)
 		/* call callback function for post-processed */
 		if (pcmd->cmdcode < ARRAY_SIZE(rtw_cmd_callback)) {
 			pcmd_callback = rtw_cmd_callback[pcmd->cmdcode].callback;
-			if (pcmd_callback == NULL) {
+			if (!pcmd_callback) {
 				RT_TRACE(_module_rtl871x_cmd_c_, _drv_info_, ("mlme_cmd_hdl(): pcmd_callback = 0x%p, cmdcode = 0x%x\n", pcmd_callback, pcmd->cmdcode));
 				rtw_free_cmd_obj(pcmd);
 			} else {
@@ -400,7 +400,7 @@ u8 rtw_joinbss_cmd(struct adapter  *padapter, struct wlan_network *pnetwork)
 	}
 
 	psecnetwork = (struct wlan_bssid_ex *)&psecuritypriv->sec_bss;
-	if (psecnetwork == NULL) {
+	if (!psecnetwork) {
 		kfree(pcmd);
 
 		res = _FAIL;
@@ -1214,7 +1214,7 @@ void rtw_createbss_cmd_callback(struct adapter *padapter, struct cmd_obj *pcmd)
 		psta = rtw_get_stainfo(&padapter->stapriv, pnetwork->MacAddress);
 		if (!psta) {
 			psta = rtw_alloc_stainfo(&padapter->stapriv, pnetwork->MacAddress);
-			if (psta == NULL) {
+			if (!psta) {
 				RT_TRACE(_module_rtl871x_cmd_c_, _drv_err_, ("\nCan't alloc sta_info when createbss_cmd_callback\n"));
 				goto createbss_cmd_fail;
 			}
@@ -1224,9 +1224,9 @@ void rtw_createbss_cmd_callback(struct adapter *padapter, struct cmd_obj *pcmd)
 	} else {
 		pwlan = _rtw_alloc_network(pmlmepriv);
 		spin_lock_bh(&pmlmepriv->scanned_queue.lock);
-		if (pwlan == NULL) {
+		if (!pwlan) {
 			pwlan = rtw_get_oldest_wlan_network(&pmlmepriv->scanned_queue);
-			if (pwlan == NULL) {
+			if (!pwlan) {
 				RT_TRACE(_module_rtl871x_cmd_c_, _drv_err_, ("\n Error:  can't get pwlan in rtw_joinbss_event_callback\n"));
 				spin_unlock_bh(&pmlmepriv->scanned_queue.lock);
 				goto createbss_cmd_fail;
@@ -1263,7 +1263,7 @@ void rtw_setstaKey_cmdrsp_callback(struct adapter *padapter,  struct cmd_obj *pc
 	struct set_stakey_rsp *psetstakey_rsp = (struct set_stakey_rsp *)(pcmd->rsp);
 	struct sta_info *psta = rtw_get_stainfo(pstapriv, psetstakey_rsp->addr);
 
-	if (psta == NULL) {
+	if (!psta) {
 		RT_TRACE(_module_rtl871x_cmd_c_, _drv_err_, ("\nERROR: %s => can't get sta_info\n\n", __func__));
 		goto exit;
 	}
@@ -1279,7 +1279,7 @@ void rtw_setassocsta_cmdrsp_callback(struct adapter *padapter,  struct cmd_obj *
 	struct set_assocsta_rsp *passocsta_rsp = (struct set_assocsta_rsp *)(pcmd->rsp);
 	struct sta_info *psta = rtw_get_stainfo(pstapriv, passocsta_parm->addr);
 
-	if (psta == NULL) {
+	if (!psta) {
 		RT_TRACE(_module_rtl871x_cmd_c_, _drv_err_, ("\nERROR: %s => can't get sta_info\n\n", __func__));
 		goto exit;
 	}