From bcb5df2c4009cfaad919aa08471f94affc772d06 Mon Sep 17 00:00:00 2001
From: "alex.lyn" <alex.lyn@antgroup.com>
Date: Thu, 24 Jul 2025 17:30:15 +0800
Subject: [PATCH] kata-sys-utils: fix warnings for s390x

The warning reports as bwlow:
```
   --> kata-sys-util/src/protection.rs:145:9
    |
145 |         return Err(ProtectionError::NoPerms)?;
    |         ^^^^^^^ help: remove it
    |
...
error: `to_string` applied to a type that implements `Display` in
`format!` args
   --> kata-sys-util/src/protection.rs:151:16
    |
151 |             err.to_string()
    |                ^^^^^^^^^^^^ help: remove this
```

Signed-off-by: alex.lyn <alex.lyn@antgroup.com>
---
 src/libs/kata-sys-util/src/protection.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/libs/kata-sys-util/src/protection.rs b/src/libs/kata-sys-util/src/protection.rs
index 223a971e84..bda1d05cbf 100644
--- a/src/libs/kata-sys-util/src/protection.rs
+++ b/src/libs/kata-sys-util/src/protection.rs
@@ -142,13 +142,13 @@ pub fn arch_guest_protection(
 #[allow(dead_code)]
 pub fn available_guest_protection() -> Result<GuestProtection, ProtectionError> {
     if !Uid::effective().is_root() {
-        return Err(ProtectionError::NoPerms)?;
+        Err(ProtectionError::NoPerms)?;
     }
 
     let facilities = crate::cpu::retrieve_cpu_facilities().map_err(|err| {
         ProtectionError::CheckFailed(format!(
             "Error retrieving cpu facilities file : {}",
-            err.to_string()
+            err
         ))
     })?;