kvm: fix init after adding new DriverInitParam

Author: Wenzel

src/driver/kvm.rs

@@ -113,8 +113,10 @@ impl<T: KVMIntrospectable> Kvm<T> {
         mut kvmi: T,
         init_option: Option<DriverInitParam>,
     ) -> Result<Self, Box<dyn Error>> {
-        let DriverInitParam::KVMiSocket(socket_path) =
-            init_option.ok_or(KVMDriverError::MissingSocketParameter)?;
+        let socket_path = match init_option.ok_or(KVMDriverError::MissingSocketParameter)? {
+            DriverInitParam::KVMiSocket(s) => s,
+            _ => return Err(Box::new(KVMDriverError::MissingSocketParameter)),
+        };
         debug!("init on {} (socket: {})", domain_name, socket_path);
         let unix_socket = SocketType::UnixSocket(socket_path);
         kvmi.init(unix_socket)?;