diff --git a/src/dragonball/dbs_virtio_devices/src/vhost/vhost_user/block.rs b/src/dragonball/dbs_virtio_devices/src/vhost/vhost_user/block.rs
index 1ac00b2da7..ad3817174e 100644
--- a/src/dragonball/dbs_virtio_devices/src/vhost/vhost_user/block.rs
+++ b/src/dragonball/dbs_virtio_devices/src/vhost/vhost_user/block.rs
@@ -224,7 +224,7 @@ impl VhostUserBlockDevice {
         // config_path = "spdk://xxxxxxx.sock", remove the prefix "spdk://"
         let vhost_socket = config_path
             .strip_prefix("spdk://")
-            .ok_or_else(|| VirtIoError::InvalidInput)?
+            .ok_or(VirtIoError::InvalidInput)?
             .to_string();
 
         let init_queues = queue_sizes.len() as u32;
diff --git a/src/dragonball/src/device_manager/balloon_dev_mgr.rs b/src/dragonball/src/device_manager/balloon_dev_mgr.rs
index fcac989155..8e1bca49a9 100644
--- a/src/dragonball/src/device_manager/balloon_dev_mgr.rs
+++ b/src/dragonball/src/device_manager/balloon_dev_mgr.rs
@@ -253,7 +253,7 @@ impl BalloonDeviceMgr {
         let device = self.info_list[index]
             .device
             .as_ref()
-            .ok_or_else(|| BalloonDeviceError::NotExist)?;
+            .ok_or(BalloonDeviceError::NotExist)?;
         if let Some(mmio_dev) = device.as_any().downcast_ref::<DbsMmioV2Device>() {
             let guard = mmio_dev.state();
             let inner_dev = guard.get_inner_device();
diff --git a/src/dragonball/src/device_manager/mem_dev_mgr.rs b/src/dragonball/src/device_manager/mem_dev_mgr.rs
index 891149f25a..b344332fc2 100644
--- a/src/dragonball/src/device_manager/mem_dev_mgr.rs
+++ b/src/dragonball/src/device_manager/mem_dev_mgr.rs
@@ -325,7 +325,7 @@ impl MemDeviceMgr {
         let device = self.info_list[index]
             .device
             .as_ref()
-            .ok_or_else(|| MemDeviceError::DeviceNotExist)?;
+            .ok_or(MemDeviceError::DeviceNotExist)?;
         if let Some(mmio_dev) = device.as_any().downcast_ref::<DbsMmioV2Device>() {
             let guard = mmio_dev.state();
             let inner_dev = guard.get_inner_device();