From 6a0fd68c48a0f00b27c0452b6b87a64545fa7fc6 Mon Sep 17 00:00:00 2001
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Sun, 4 May 2025 17:54:57 +0200
Subject: [PATCH] tun/netstack: remove usage of pkt.IsNil()

Since 3c75945fd ("netstack: remove PacketBuffer.IsNil()") this has been
invalid. Follow the replacement pattern of that commit.

The old definition inlined to the same code anyway:

 func (pk *PacketBuffer) IsNil() bool {
 	return pk == nil
 }

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
---
 tun/netstack/tun.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tun/netstack/tun.go b/tun/netstack/tun.go
index 13d1f11..2c25649 100644
--- a/tun/netstack/tun.go
+++ b/tun/netstack/tun.go
@@ -155,7 +155,7 @@ func (tun *netTun) Write(buf [][]byte, offset int) (int, error) {
 
 func (tun *netTun) WriteNotify() {
 	pkt := tun.ep.Read()
-	if pkt.IsNil() {
+	if pkt == nil {
 		return
 	}