From c7ec6caf4de7cfd656678b605aeff70ba5234188 Mon Sep 17 00:00:00 2001
From: Brad Stein <Brad.Stein@gmail.com>
Date: Sat, 10 Jan 2026 00:39:01 -0300
Subject: [PATCH] server: gate UVC SET_CUR ack on env

---
 server/src/bin/lesavka-uvc.rs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/server/src/bin/lesavka-uvc.rs b/server/src/bin/lesavka-uvc.rs
index 85233c6..8299a2c 100644
--- a/server/src/bin/lesavka-uvc.rs
+++ b/server/src/bin/lesavka-uvc.rs
@@ -524,8 +524,9 @@ fn handle_data(
                     payload
                 );
             }
-            // ACK commit after we've processed the payload.
-            let _ = send_response(fd, uvc_send_response, &[]);
+            if std::env::var("LESAVKA_UVC_ACK_AFTER_DATA").is_ok() {
+                let _ = send_response(fd, uvc_send_response, &[]);
+            }
         }
     }
 }