/* DBG_871X("+%s() length =%d\n", __func__, length); */
 
        tmp = rtw_zmalloc(length);
-       if (tmp == NULL)
+       if (!tmp)
                return;
 
        memcpy(tmp, pbuf, length);
 
        n = NR_RECVBUFF * sizeof(struct recv_buf) + 4;
        precvpriv->pallocated_recv_buf = rtw_zmalloc(n);
-       if (precvpriv->pallocated_recv_buf == NULL) {
+       if (!precvpriv->pallocated_recv_buf) {
                res = _FAIL;
                RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("alloc recv_buf fail!\n"));
                goto exit;
                if (res == _FAIL)
                        break;
 
-               if (precvbuf->pskb == NULL) {
+               if (!precvbuf->pskb) {
                        SIZE_PTR tmpaddr = 0;
                        SIZE_PTR alignment = 0;
 
                                skb_reserve(precvbuf->pskb, (RECVBUFF_ALIGN_SZ - alignment));
                        }
 
-                       if (precvbuf->pskb == NULL) {
+                       if (!precvbuf->pskb) {
                                DBG_871X("%s: alloc_skb fail!\n", __func__);
                        }
                }