From 1b9a0f7ee225b14ac3bd5a3a09f4da6fb9ae7a40 Mon Sep 17 00:00:00 2001
From: Brad Stein <Brad.Stein@gmail.com>
Date: Wed, 7 Jan 2026 02:56:27 -0300
Subject: [PATCH] uvc: send SET_CUR response after data

---
 server/src/bin/lesavka-uvc.rs | 34 +++++++++++++++++++++-------------
 1 file changed, 21 insertions(+), 13 deletions(-)

diff --git a/server/src/bin/lesavka-uvc.rs b/server/src/bin/lesavka-uvc.rs
index f7562f4..e53e863 100644
--- a/server/src/bin/lesavka-uvc.rs
+++ b/server/src/bin/lesavka-uvc.rs
@@ -215,7 +215,15 @@ fn main() -> Result<()> {
                             data.length
                         );
                     }
-                    handle_data(&mut state, &mut pending, interfaces, data, debug);
+                    handle_data(
+                        fd,
+                        uvc_send_response,
+                        &mut state,
+                        &mut pending,
+                        interfaces,
+                        data,
+                        debug,
+                    );
                 }
                 _ => {
                     if debug {
@@ -370,18 +378,15 @@ fn handle_setup(
     }
     let interface = map_interface(interface_raw, selector, interfaces, debug);
 
-    if !is_in && req.b_request == UVC_SET_CUR {
-        if interface != interfaces.streaming {
-            let _ = send_stall(fd, uvc_send_response);
-            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={}",
+        if !is_in && req.b_request == UVC_SET_CUR {
+            if interface != interfaces.streaming {
+                let _ = send_stall(fd, uvc_send_response);
+                return;
+            }
+            *pending = Some(PendingRequest { interface, selector });
+            if debug {
+                eprintln!(
+                    "[lesavka-uvc] SET_CUR queued len={} iface={} sel={}",
                 req.w_length, interface, selector
             );
         }
@@ -452,6 +457,8 @@ fn maybe_update_ctrl_len(state: &mut UvcState, w_length: u16, debug: bool) {
 }
 
 fn handle_data(
+    fd: i32,
+    uvc_send_response: libc::c_ulong,
     state: &mut UvcState,
     pending: &mut Option<PendingRequest>,
     interfaces: UvcInterfaces,
@@ -507,6 +514,7 @@ fn handle_data(
                 );
             }
         }
+        let _ = send_response(fd, uvc_send_response, &[]);
     }
 }