From 129b508123e1bb2b7f32618e498f923611c9ea39 Mon Sep 17 00:00:00 2001
From: Brad Stein <Brad.Stein@gmail.com>
Date: Fri, 9 Jan 2026 17:55:36 -0300
Subject: [PATCH] uvc: ack SET_CUR after data

---
 server/src/bin/lesavka-uvc.rs | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/server/src/bin/lesavka-uvc.rs b/server/src/bin/lesavka-uvc.rs
index 5258e6d..0605f0f 100644
--- a/server/src/bin/lesavka-uvc.rs
+++ b/server/src/bin/lesavka-uvc.rs
@@ -384,9 +384,6 @@ fn handle_setup(
             return;
         }
         *pending = Some(PendingRequest { interface, selector });
-        let len = req.w_length as usize;
-        let payload = vec![0u8; len.min(UVC_DATA_SIZE)];
-        let _ = send_response(fd, uvc_send_response, &payload);
         if debug {
             eprintln!(
                 "[lesavka-uvc] SET_CUR queued len={} iface={} sel={}",
@@ -525,7 +522,8 @@ fn handle_data(
                 );
             }
         }
-        // No extra response required; ep0 data stage completion ends the control transfer.
+        // ACK the OUT transfer after we've processed the payload.
+        let _ = send_response(fd, uvc_send_response, &[]);
     }
 }