Staging: rtl8712: rtl8712_recv: Use !x instead of x == NULL

Use !x instead of x == NULL. This patch was found by checkpatch.
Signed-off-by: Sandhya Bankar <bankarsandhya512@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8712/rtl8712_recv.c

@@ -60,7 +60,7 @@ int r8712_init_recv_priv(struct recv_priv *precvpriv, struct _adapter *padapter)
 	_init_queue(&precvpriv->free_recv_buf_queue);
 	precvpriv->pallocated_recv_buf =
 		kzalloc(NR_RECVBUFF * sizeof(struct recv_buf) + 4, GFP_ATOMIC);
-	if (precvpriv->pallocated_recv_buf == NULL)
+	if (!precvpriv->pallocated_recv_buf)
 		return _FAIL;
 	precvpriv->precv_buf = precvpriv->pallocated_recv_buf + 4 -
 			      ((addr_t) (precvpriv->pallocated_recv_buf) & 3);
@@ -274,7 +274,7 @@ union recv_frame *r8712_recvframe_chk_defrag(struct _adapter *padapter,
 	fragnum = pfhdr->attrib.frag_num;
 	psta_addr = pfhdr->attrib.ta;
 	psta = r8712_get_stainfo(pstapriv, psta_addr);
-	if (psta == NULL)
+	if (!psta)
 		pdefrag_q = NULL;
 	else
 		pdefrag_q = &psta->sta_recvpriv.defrag_q;
@@ -999,15 +999,15 @@ int recv_func(struct _adapter *padapter, void *pcontext)
 	}
 	process_phy_info(padapter, prframe);
 	prframe = r8712_decryptor(padapter, prframe);
-	if (prframe == NULL) {
+	if (!prframe) {
 		retval = _FAIL;
 		goto _exit_recv_func;
 	}
 	prframe = r8712_recvframe_chk_defrag(padapter, prframe);
-	if (prframe == NULL)
+	if (!prframe)
 		goto _exit_recv_func;
 	prframe = r8712_portctrl(padapter, prframe);
-	if (prframe == NULL) {
+	if (!prframe) {
 		retval = _FAIL;
 		goto _exit_recv_func;
 	}
@@ -1065,7 +1065,7 @@ static int recvbuf2recvframe(struct _adapter *padapter, struct sk_buff *pskb)
 		if ((le32_to_cpu(prxstat->rxdw0) >> 23) & 0x01)
 			shift_sz = 2;
 		precvframe = r8712_alloc_recvframe(pfree_recv_queue);
-		if (precvframe == NULL)
+		if (!precvframe)
 			goto  _exit_recvbuf2recvframe;
 		INIT_LIST_HEAD(&precvframe->u.hdr.list);
 		precvframe->u.hdr.precvbuf = NULL; /*can't access the precvbuf*/