spin_lock_irqsave(&pfree_recv_queue->lock, irqL);
        list_del_init(&(precvframe->u.hdr.list));
        list_add_tail(&(precvframe->u.hdr.list), &pfree_recv_queue->queue);
-       if (padapter != NULL) {
+       if (padapter) {
                if (pfree_recv_queue == &precvpriv->free_recv_queue)
                        precvpriv->free_recvframe_cnt++;
        }
                /* 0~(n-1) fragment frame
                 * enqueue to defraf_g
                 */
-               if (pdefrag_q != NULL) {
+               if (pdefrag_q) {
                        if (fragnum == 0) {
                                /*the first fragment*/
                                if (!list_empty(&pdefrag_q->queue)) {
                /* the last fragment frame
                 * enqueue the last fragment
                 */
-               if (pdefrag_q != NULL) {
+               if (pdefrag_q) {
                        phead = &pdefrag_q->queue;
                        list_add_tail(&pfhdr->list, phead);
                        /*call recvframe_defrag to defrag*/
                        prtnframe = NULL;
                }
        }
-       if ((prtnframe != NULL) && (prtnframe->u.hdr.attrib.privacy)) {
+       if (prtnframe && (prtnframe->u.hdr.attrib.privacy)) {
                /* after defrag we must check tkip mic code */
                if (r8712_recvframe_chkmic(padapter, prtnframe) == _FAIL) {
                        r8712_free_recvframe(prtnframe, pfree_recv_queue);
        struct rx_pkt_attrib *pattrib;
        struct smooth_rssi_data *sqd = &padapter->recvpriv.signal_qual_data;
 
-       if (prframe == NULL || padapter == NULL)
+       if (!prframe || !padapter)
                return;
        pattrib = &prframe->u.hdr.attrib;
        if (pattrib->signal_qual != 0) {