Switch to ControlHandler owned bufs for control_in()

2 files changed, 7 insertions, 11 deletions

diff --git a/embassy-usb/src/control.rs b/embassy-usb/src/control.rs
index cdae2d977..195b218dc 100644
--- a/embassy-usb/src/control.rs
+++ b/embassy-usb/src/control.rs
@@ -133,8 +133,8 @@ pub enum OutResponse {
 
 #[derive(Copy, Clone, Eq, PartialEq, Debug)]
 #[cfg_attr(feature = "defmt", derive(defmt::Format))]
-pub enum InResponse {
-    Accepted(usize),
+pub enum InResponse<'a> {
+    Accepted(&'a [u8]),
     Rejected,
 }
 
@@ -164,8 +164,7 @@ pub trait ControlHandler {
     /// # Arguments
     ///
     /// * `req` - The request from the SETUP packet.
-    /// * `resp` - The buffer for you to write the response.
-    fn control_in(&mut self, req: Request, resp: &mut [u8]) -> InResponse {
+    fn control_in(&mut self, req: Request) -> InResponse<'_> {
         InResponse::Rejected
     }
 }
diff --git a/embassy-usb/src/lib.rs b/embassy-usb/src/lib.rs
index 9ac55db78..5a82f5cae 100644
--- a/embassy-usb/src/lib.rs
+++ b/embassy-usb/src/lib.rs
@@ -284,13 +284,10 @@ impl<'d, D: Driver<'d>> UsbDevice<'d, D> {
                     .find(|(i, _)| req.index == *i as _)
                     .map(|(_, h)| h);
                 match handler {
-                    Some(handler) => {
-                        let mut buf = [0; 128];
-                        match handler.control_in(req, &mut buf) {
-                            InResponse::Accepted(len) => self.control.accept_in(&buf[..len]).await,
-                            InResponse::Rejected => self.control.reject(),
-                        }
-                    }
+                    Some(handler) => match handler.control_in(req) {
+                        InResponse::Accepted(data) => self.control.accept_in(data).await,
+                        InResponse::Rejected => self.control.reject(),
+                    },
                     None => self.control.reject(),
                 }
             }