process::exit if the HapticsWorker dies

src/dial_device/haptics.rs

@@ -58,7 +58,7 @@ impl DialHapticsWorker {
             eprintln!("haptics worker is ready");
 
             let api = HidApi::new().map_err(Error::HidError)?;
-            let hid_device = api.open(0x045e, 0x091b).map_err(|_| Error::MissingDial)?;
+            let hid_device = api.open(0x045e, 0x091b).map_err(Error::HidError)?;
             let wrapper = DialHidWrapper { hid_device };
 
             loop {

src/dial_device/mod.rs

@@ -69,8 +69,12 @@ impl DialDevice {
         std::thread::spawn({
             let mut worker = DialHapticsWorker::new(haptics_msg_rx)?;
             move || {
-                worker.run().unwrap();
+                if let Err(err) = worker.run() {
+                    eprintln!("Unexpected haptics worker error! {}", err);
+                }
                 eprintln!("the haptics worker died!");
+                // there's no coming back from this.
+                std::process::exit(0);
             }
         });