diff --git a/virtio-devices/src/net.rs b/virtio-devices/src/net.rs
index 3a97c9fd1..981ae8e30 100644
--- a/virtio-devices/src/net.rs
+++ b/virtio-devices/src/net.rs
@@ -449,15 +449,11 @@ impl VirtioDevice for Net {
                 let tx = TxVirtio::new();
                 let rx_tap_listening = false;
 
-                let mut queue_pair = Vec::new();
-                queue_pair.push(queues.remove(0));
-                queue_pair.push(queues.remove(0));
+                let mut queue_pair = vec![queues.remove(0), queues.remove(0)];
                 queue_pair[0].set_event_idx(event_idx);
                 queue_pair[1].set_event_idx(event_idx);
 
-                let mut queue_evt_pair = Vec::new();
-                queue_evt_pair.push(queue_evts.remove(0));
-                queue_evt_pair.push(queue_evts.remove(0));
+                let queue_evt_pair = vec![queue_evts.remove(0), queue_evts.remove(0)];
 
                 let kill_evt = self
                     .common
diff --git a/virtio-devices/src/transport/pci_device.rs b/virtio-devices/src/transport/pci_device.rs
index 8b71003a5..c63e773eb 100644
--- a/virtio-devices/src/transport/pci_device.rs
+++ b/virtio-devices/src/transport/pci_device.rs
@@ -631,7 +631,7 @@ impl VirtioPciDevice {
 
         if offset < std::mem::size_of::<VirtioPciCap>() {
             let (_, right) = cap_slice.split_at_mut(offset);
-            right[..data_len].copy_from_slice(&data[..]);
+            right[..data_len].copy_from_slice(&data);
             None
         } else {
             // Safe since we know self.cap_pci_cfg_info.cap.cap.offset is 32bits long.
diff --git a/virtio-devices/src/vhost_user/blk.rs b/virtio-devices/src/vhost_user/blk.rs
index 36bd79cdd..71b19c666 100644
--- a/virtio-devices/src/vhost_user/blk.rs
+++ b/virtio-devices/src/vhost_user/blk.rs
@@ -231,8 +231,7 @@ impl VirtioDevice for Blk {
 
         let mut epoll_threads = Vec::new();
         for i in 0..vu_interrupt_list.len() {
-            let mut interrupt_list_sub: Vec<(Option<EventFd>, Queue)> = Vec::with_capacity(1);
-            interrupt_list_sub.push(vu_interrupt_list.remove(0));
+            let interrupt_list_sub = vec![vu_interrupt_list.remove(0)];
 
             let kill_evt = self
                 .common
diff --git a/virtio-devices/src/vhost_user/net.rs b/virtio-devices/src/vhost_user/net.rs
index b65570d1f..ea52084e6 100644
--- a/virtio-devices/src/vhost_user/net.rs
+++ b/virtio-devices/src/vhost_user/net.rs
@@ -288,9 +288,7 @@ impl VirtioDevice for Net {
 
         let mut epoll_threads = Vec::new();
         for i in 0..vu_interrupt_list.len() / 2 {
-            let mut interrupt_list_sub: Vec<(Option<EventFd>, Queue)> = Vec::with_capacity(2);
-            interrupt_list_sub.push(vu_interrupt_list.remove(0));
-            interrupt_list_sub.push(vu_interrupt_list.remove(0));
+            let interrupt_list_sub = vec![vu_interrupt_list.remove(0), vu_interrupt_list.remove(0)];
 
             let kill_evt = self
                 .common