staging: r8712u: Remove useless return variables

This patch remove variables that are initialized with a constant,
are never updated, and are only used as parameter of return.
Return the constant instead of using a variable.

Verified by compilation only.

The coccinelle script that find and fixes this issue is:
// <smpl>
@@
type T;
constant C;
identifier ret;
@@
- T ret = C;
... when != ret
- return ret;
+ return C;
// </smpl>

Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/rtl8712/rtl8712_recv.c b/drivers/staging/rtl8712/rtl8712_recv.c
index 0723b2f..667398a 100644
--- a/drivers/staging/rtl8712/rtl8712_recv.c
+++ b/drivers/staging/rtl8712/rtl8712_recv.c
@@ -123,8 +123,6 @@
 
 int r8712_init_recvbuf(struct _adapter *padapter, struct recv_buf *precvbuf)
 {
-	int res = _SUCCESS;
-
 	precvbuf->transfer_len = 0;
 	precvbuf->len = 0;
 	precvbuf->ref_cnt = 0;
@@ -134,7 +132,7 @@
 		precvbuf->ptail = precvbuf->pbuf;
 		precvbuf->pend = precvbuf->pdata + MAX_RECVBUF_SZ;
 	}
-	return res;
+	return _SUCCESS;
 }
 
 int r8712_free_recvframe(union recv_frame *precvframe,
@@ -347,7 +345,6 @@
 	_pkt *sub_skb, *subframes[MAX_SUBFRAME_COUNT];
 	struct recv_priv *precvpriv = &padapter->recvpriv;
 	struct  __queue *pfree_recv_queue = &(precvpriv->free_recv_queue);
-	int	ret = _SUCCESS;
 
 	nr_subframes = 0;
 	pattrib = &prframe->u.hdr.attrib;
@@ -435,7 +432,7 @@
 exit:
 	prframe->u.hdr.len = 0;
 	r8712_free_recvframe(prframe, pfree_recv_queue);
-	return ret;
+	return _SUCCESS;
 }
 
 void r8712_rxcmd_event_hdl(struct _adapter *padapter, void *prxcmdbuf)