diff --git a/src/fs/cgroup.rs b/src/fs/cgroup.rs
index ef9aade..f92fd99 100644
--- a/src/fs/cgroup.rs
+++ b/src/fs/cgroup.rs
@@ -84,9 +84,9 @@ impl Cgroup {
         if self.hier.v2() {
             create_v2_cgroup(self.hier.root(), &self.path, &self.specified_controllers)
         } else {
-            for subsystem in &self.subsystems {
-                subsystem.to_controller().create();
-            }
+            self.subsystems
+                .iter()
+                .try_for_each(|subsystem| subsystem.to_controller().create())?;
             Ok(())
         }
     }
diff --git a/src/fs/mod.rs b/src/fs/mod.rs
index f5255a4..02a671a 100644
--- a/src/fs/mod.rs
+++ b/src/fs/mod.rs
@@ -5,7 +5,6 @@
 //
 
 #![allow(clippy::unnecessary_unwrap)]
-use log::*;
 
 use std::collections::HashMap;
 use std::fmt;
@@ -265,7 +264,7 @@ pub trait Controller {
     fn apply(&self, res: &Resources) -> Result<()>;
 
     /// Create this controller
-    fn create(&self);
+    fn create(&self) -> Result<()>;
 
     /// Does this controller already exist?
     fn exists(&self) -> bool;
@@ -323,14 +322,14 @@ where
     }
 
     /// Create this controller
-    fn create(&self) {
+    fn create(&self) -> Result<()> {
         self.verify_path()
             .unwrap_or_else(|_| panic!("path should be valid: {:?}", self.path()));
 
-        match ::std::fs::create_dir_all(self.get_path()) {
-            Ok(_) => self.post_create(),
-            Err(e) => warn!("error create_dir: {:?} error: {:?}", self.get_path(), e),
-        }
+        std::fs::create_dir_all(self.get_path())
+            .map_err(|err| Error::with_cause(ErrorKind::FsError, err))?;
+        self.post_create();
+        Ok(())
     }
 
     /// Set notify_on_release
diff --git a/src/systemd/dbus/client.rs b/src/systemd/dbus/client.rs
index 8bbe245..b1b5df4 100644
--- a/src/systemd/dbus/client.rs
+++ b/src/systemd/dbus/client.rs
@@ -248,7 +248,7 @@ pub mod tests {
         String::from_utf8_lossy(&output.stdout).to_string()
     }
 
-    fn start_default_cgroup(pid: CgroupPid, unit: &str) -> SystemdClient {
+    fn start_default_cgroup(pid: CgroupPid, unit: &'_ str) -> SystemdClient<'_> {
         let mut props = PropertiesBuilder::default_cgroup(TEST_SLICE, unit).build();
         props.push((PIDS, Value::Array(vec![pid.pid as u32].into())));
         let cgroup = SystemdClient::new(unit, props).unwrap();