From 778cbbd23eea54628b43affb5e0a2387f4d46a2d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pablo=20Fuente=20P=C3=A9rez?= <pablofuenteperez@gmail.com>
Date: Wed, 15 Jan 2025 10:51:18 +0100
Subject: [PATCH] Fix possible deadlock dut to missing mutex unlock in
 datachannel.go

Caused by a regression introduced in commit https://github.com/pion/webrtc/commit/835ac3b08ef5dfd0f6c0b047cdeea635258a21e3#diff-b8da7f3e746d55a2fe2a4295ae5fe5cf76b9512d7665201285143e25ab3bd3b9L423
---
 datachannel.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/datachannel.go b/datachannel.go
index 52de821b7e5..ea50a031feb 100644
--- a/datachannel.go
+++ b/datachannel.go
@@ -464,10 +464,12 @@ func (d *DataChannel) DetachWithDeadline() (datachannel.ReadWriteCloserDeadliner
 	d.mu.Lock()
 
 	if !d.api.settingEngine.detach.DataChannels {
+		d.mu.Unlock()
 		return nil, errDetachNotEnabled
 	}
 
 	if d.dataChannel == nil {
+		d.mu.Unlock()
 		return nil, errDetachBeforeOpened
 	}