From 2526660a9687fe9699bf679d775392fdbb6e4a54 Mon Sep 17 00:00:00 2001
From: sago35 <sago35@gmail.com>
Date: Sun, 25 Dec 2022 19:07:17 +0900
Subject: [PATCH] WIP: no data

---
 rtl8720dn/netdriver.go | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/rtl8720dn/netdriver.go b/rtl8720dn/netdriver.go
index 629b491..ade8903 100644
--- a/rtl8720dn/netdriver.go
+++ b/rtl8720dn/netdriver.go
@@ -344,8 +344,11 @@ func (d *Driver) ReadSocket(b []byte) (n int, err error) {
 		if err != nil {
 			return 0, err
 		}
-		if nn < 0 {
-			return 0, fmt.Errorf("error %d", n)
+		if nn == -76 {
+			// no data
+			return 0, nil
+		} else if nn < 0 {
+			return 0, fmt.Errorf("error %d", nn)
 		} else if nn == 0 || nn == -30848 {
 			return 0, d.DisconnectSocket()
 		}