diff --git a/devices/src/pci/vfio_pci.rs b/devices/src/pci/vfio_pci.rs
index 90733120c8..5b0474a25a 100644
--- a/devices/src/pci/vfio_pci.rs
+++ b/devices/src/pci/vfio_pci.rs
@@ -100,8 +100,8 @@ pub struct VfioPciDevice {
 
 impl VfioPciDevice {
     /// Constructs a new Vfio Pci device for the give Vfio device
-    pub fn new(device: Box<VfioDevice>) -> Self {
-        let dev = Arc::new(*device);
+    pub fn new(device: VfioDevice) -> Self {
+        let dev = Arc::new(device);
         let config = VfioPciConfig::new(Arc::clone(&dev));
         VfioPciDevice {
             device: dev,
@@ -131,7 +131,7 @@ impl VfioPciDevice {
 
 impl PciDevice for VfioPciDevice {
     fn debug_label(&self) -> String {
-        format!("vfio pci device")
+        "vfio pci device".to_string()
     }
 
     fn assign_bus_dev(&mut self, bus: u8, device: u8) {
diff --git a/devices/src/vfio.rs b/devices/src/vfio.rs
index c5d37176d7..966085fbf9 100644
--- a/devices/src/vfio.rs
+++ b/devices/src/vfio.rs
@@ -78,7 +78,7 @@ impl VfioContainer {
             .read(true)
             .write(true)
             .open("/dev/vfio/vfio")
-            .map_err(|e| VfioError::OpenContainer(e))?;
+            .map_err(VfioError::OpenContainer)?;
 
         Ok(VfioContainer { container })
     }
@@ -164,7 +164,7 @@ impl VfioGroup {
             .read(true)
             .write(true)
             .open(Path::new(&group_path))
-            .map_err(|e| VfioError::OpenGroup(e))?;
+            .map_err(VfioError::OpenGroup)?;
 
         let mut group_status = vfio_group_status {
             argsz: mem::size_of::<vfio_group_status>() as u32,
@@ -217,7 +217,7 @@ impl VfioGroup {
             flags: 0,
         };
         vm.create_device(&mut vfio_dev)
-            .map_err(|e| VfioError::CreateVfioKvmDevice(e))?;
+            .map_err(VfioError::CreateVfioKvmDevice)?;
 
         // Safe as we are the owner of vfio_dev.fd which is valid value.
         let vfio_dev_fd = unsafe { File::from_raw_fd(vfio_dev.fd as i32) };
diff --git a/src/linux.rs b/src/linux.rs
index c7612401d6..6de02e9b77 100644
--- a/src/linux.rs
+++ b/src/linux.rs
@@ -990,7 +990,7 @@ fn create_devices(
     if cfg.vfio.is_some() {
         let vfio_path = cfg.vfio.as_ref().unwrap().as_path();
         let vfiodevice =
-            Box::new(VfioDevice::new(vfio_path, vm, mem.clone()).map_err(Error::CreateVfioDevice)?);
+            VfioDevice::new(vfio_path, vm, mem.clone()).map_err(Error::CreateVfioDevice)?;
         let vfiopcidevice = Box::new(VfioPciDevice::new(vfiodevice));
         pci_devices.push((vfiopcidevice, simple_jail(&cfg, "vfio_device.policy")?));
     }
diff --git a/vfio_sys/src/vfio.rs b/vfio_sys/src/vfio.rs
index 45b4cc95bd..3b88848690 100644
--- a/vfio_sys/src/vfio.rs
+++ b/vfio_sys/src/vfio.rs
@@ -81,10 +81,10 @@ pub const VFIO_DEVICE_FLAGS_PCI: u32 = 2;
 pub const VFIO_DEVICE_FLAGS_PLATFORM: u32 = 4;
 pub const VFIO_DEVICE_FLAGS_AMBA: u32 = 8;
 pub const VFIO_DEVICE_FLAGS_CCW: u32 = 16;
-pub const VFIO_DEVICE_API_PCI_STRING: &'static [u8; 9usize] = b"vfio-pci\0";
-pub const VFIO_DEVICE_API_PLATFORM_STRING: &'static [u8; 14usize] = b"vfio-platform\0";
-pub const VFIO_DEVICE_API_AMBA_STRING: &'static [u8; 10usize] = b"vfio-amba\0";
-pub const VFIO_DEVICE_API_CCW_STRING: &'static [u8; 9usize] = b"vfio-ccw\0";
+pub const VFIO_DEVICE_API_PCI_STRING: &[u8; 9usize] = b"vfio-pci\0";
+pub const VFIO_DEVICE_API_PLATFORM_STRING: &[u8; 14usize] = b"vfio-platform\0";
+pub const VFIO_DEVICE_API_AMBA_STRING: &[u8; 10usize] = b"vfio-amba\0";
+pub const VFIO_DEVICE_API_CCW_STRING: &[u8; 9usize] = b"vfio-ccw\0";
 pub const VFIO_REGION_INFO_FLAG_READ: u32 = 1;
 pub const VFIO_REGION_INFO_FLAG_WRITE: u32 = 2;
 pub const VFIO_REGION_INFO_FLAG_MMAP: u32 = 4;