staging: r8188eu: correct error logic of rtl8188eu_init_recv_priv()

Convert the function rtl8188eu_init_recv_priv() away from returning
_FAIL and _SUCCESS, which uses inverted error logic. Return 0 for
success and negative values for failure instead.
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150
Link: https://lore.kernel.org/r/20230205080559.8319-2-straube.linux@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/core/rtw_recv.c

@@ -38,7 +38,7 @@ void _rtw_init_sta_recv_priv(struct sta_recv_priv *psta_recvpriv)
 static int rtl8188eu_init_recv_priv(struct adapter *padapter)
 {
 	struct recv_priv *precvpriv = &padapter->recvpriv;
-	int i, res = _SUCCESS;
+	int i, err = 0;
 	struct recv_buf *precvbuf;
 
 	tasklet_init(&precvpriv->recv_tasklet,
@@ -50,10 +50,8 @@ static int rtl8188eu_init_recv_priv(struct adapter *padapter)
 
 	precvpriv->pallocated_recv_buf = kzalloc(NR_RECVBUFF * sizeof(struct recv_buf) + 4,
 						 GFP_KERNEL);
-	if (!precvpriv->pallocated_recv_buf) {
-		res = _FAIL;
-		goto exit;
-	}
+	if (!precvpriv->pallocated_recv_buf)
+		return -ENOMEM;
 
 	precvpriv->precv_buf = (u8 *)ALIGN((size_t)(precvpriv->pallocated_recv_buf), 4);
 
@@ -64,7 +62,7 @@ static int rtl8188eu_init_recv_priv(struct adapter *padapter)
 		precvbuf->reuse = false;
 		precvbuf->purb = usb_alloc_urb(0, GFP_KERNEL);
 		if (!precvbuf->purb) {
-			res = _FAIL;
+			err = -ENOMEM;
 			break;
 		}
 		precvbuf->adapter = padapter;
@@ -94,8 +92,8 @@ static int rtl8188eu_init_recv_priv(struct adapter *padapter)
 			pskb = NULL;
 		}
 	}
-exit:
-	return res;
+
+	return err;
 }
 
 int _rtw_init_recv_priv(struct recv_priv *precvpriv, struct adapter *padapter)
@@ -141,7 +139,8 @@ int _rtw_init_recv_priv(struct recv_priv *precvpriv, struct adapter *padapter)
 	}
 	precvpriv->rx_pending_cnt = 1;
 
-	res = rtl8188eu_init_recv_priv(padapter);
+	if (rtl8188eu_init_recv_priv(padapter))
+		res = _FAIL;
 
 	timer_setup(&precvpriv->signal_stat_timer, rtw_signal_stat_timer_hdl, 0);
 	precvpriv->signal_stat_sampling_interval = 1000; /* ms */