[PATCH v3 4/5] rust: serdev: use DropGuard

[Mohamed Osama]

Replace the ScopeGuard usage in the serial device bus implementation
with DropGuard.

Use DropGuard::dismiss() when ownership of the private data needs to be
transferred without running the cleanup callback.

Signed-off-by: Mohamed Osama <mohamed.osama189110@xxxxxxxxx>
---
 rust/kernel/serdev.rs | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/rust/kernel/serdev.rs b/rust/kernel/serdev.rs
index 17ca504b7f8d..dd43b159b461 100644
--- a/rust/kernel/serdev.rs
+++ b/rust/kernel/serdev.rs
@@ -13,6 +13,7 @@
         to_result,
         VTABLE_DEFAULT_ERROR, //
     },
+    mem::DropGuard,
     new_mutex,
     of,
     prelude::*,
@@ -21,10 +22,7 @@
         Mutex, //
     },
     time::Jiffies,
-    types::{
-        Opaque,
-        ScopeGuard, //
-    }, //
+    types::Opaque, //
 };
 
 use core::{
@@ -174,7 +172,7 @@ extern "C" fn probe_callback(sdev: *mut bindings::serdev_device) -> kernel::ffi:
             }))?;
             // SAFETY: We just set drvdata to `PrivateData<'_, T>`.
             let private_data = unsafe { sdev.as_ref().drvdata_borrow::<PrivateData<'_, T>>() };
-            let private_data = ScopeGuard::new_with_data(private_data, |_| {
+            let private_data = DropGuard::new(private_data, |_| {
                 // SAFETY: We just set drvdata to `PrivateData<'_, T>`.
                 drop(unsafe { sdev.as_ref().drvdata_obtain::<PrivateData<'_, T>>() });
             });
@@ -204,7 +202,7 @@ extern "C" fn probe_callback(sdev: *mut bindings::serdev_device) -> kernel::ffi:
             drop(active);
 
             result.map(|()| {
-                private_data.dismiss();
+                DropGuard::dismiss(private_data);
                 0
             })
         })
-- 
2.43.0