embassy-usb-dfu: fix: do not reset in GetStatus request

Only reset the device after a USB reset request. This avoids
error messages with update tools, which expect a response to
a GetStatus request (like dfu-util).

Author: paroga

embassy-usb-dfu/CHANGELOG.md

@@ -8,6 +8,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 <!-- next-header -->
 ## Unreleased - ReleaseDate
 
+- changed: Do not reset in the GetStatus request
+
 ## 0.2.0 - 2025-08-27
 
 - First release with changelog.

embassy-usb-dfu/src/dfu.rs

@@ -182,7 +182,7 @@ impl<'d, DFU: NorFlash, STATE: NorFlash, RST: Reset, const BLOCK_SIZE: usize> Ha
             Ok(Request::GetStatus) => {
                 match self.state {
                     State::DlSync => self.state = State::Download,
-                    State::ManifestSync => self.reset.sys_reset(),
+                    State::ManifestSync => self.state = State::ManifestWaitReset,
                     _ => {}
                 }
 
@@ -201,6 +201,12 @@ impl<'d, DFU: NorFlash, STATE: NorFlash, RST: Reset, const BLOCK_SIZE: usize> Ha
             _ => None,
         }
     }
+
+    fn reset(&mut self) {
+        if matches!(self.state, State::ManifestSync | State::ManifestWaitReset) {
+            self.reset.sys_reset()
+        }
+    }
 }
 
 /// An implementation of the USB DFU 1.1 protocol