staging: r8188eu: remove unused fields in struct recv_buf

The fields len, ref_cnt and transfer_len in struct recv_buf are set
but not used. Remove them.
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
Link: https://lore.kernel.org/r/fe5565c02a01babf64469333dae73cbdd841d393.1646321515.git.abdun.nihaal@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/hal/rtl8188eu_recv.c

@@ -14,12 +14,6 @@
 
 void rtl8188eu_init_recvbuf(struct recv_buf *precvbuf)
 {
-	precvbuf->transfer_len = 0;
-
-	precvbuf->len = 0;
-
-	precvbuf->ref_cnt = 0;
-
 	if (precvbuf->pbuf) {
 		precvbuf->pdata = precvbuf->pbuf;
 		precvbuf->phead = precvbuf->pbuf;
@@ -58,7 +52,6 @@ int	rtl8188eu_init_recv_priv(struct adapter *padapter)
 		res = rtw_os_recvbuf_resource_alloc(padapter, precvbuf);
 		if (res == _FAIL)
 			break;
-		precvbuf->ref_cnt = 0;
 		precvbuf->adapter = padapter;
 		precvbuf++;
 	}

drivers/staging/r8188eu/hal/usb_ops_linux.c

@@ -364,7 +364,6 @@ static void usb_read_port_complete(struct urb *purb, struct pt_regs *regs)
 		} else {
 			rtw_reset_continual_urb_error(adapter_to_dvobj(adapt));
 
-			precvbuf->transfer_len = purb->actual_length;
 			skb_put(precvbuf->pskb, purb->actual_length);
 			skb_queue_tail(&precvpriv->rx_skb_queue, precvbuf->pskb);
 

drivers/staging/r8188eu/include/rtw_recv.h

@@ -207,11 +207,9 @@ struct sta_recv_priv {
 };
 
 struct recv_buf {
-	u32	ref_cnt;
 	struct adapter *adapter;
 	u8	*pbuf;
 	u8	*pallocated_buf;
-	u32	len;
 	u8	*phead;
 	u8	*pdata;
 	u8	*ptail;
@@ -220,7 +218,6 @@ struct recv_buf {
 	dma_addr_t dma_transfer_addr;	/* (in) dma addr for transfer_buffer */
 	u32 alloc_sz;
 	u8  irp_pending;
-	int  transfer_len;
 	struct sk_buff *pskb;
 	u8	reuse;
 };

drivers/staging/r8188eu/os_dep/recv_linux.c

@@ -30,8 +30,6 @@ int rtw_os_recvbuf_resource_alloc(struct adapter *padapter,
 	precvbuf->phead = NULL;
 	precvbuf->ptail = NULL;
 	precvbuf->pend = NULL;
-	precvbuf->transfer_len = 0;
-	precvbuf->len = 0;
 	return res;
 }