1 files changed, 19 insertions, 2 deletions
diff --git a/rust/kernel/block/mq/request.rs b/rust/kernel/block/mq/request.rs
index f62a376dc313..c5f1f6b1ccfb 100644
--- a/rust/kernel/block/mq/request.rs
+++ b/rust/kernel/block/mq/request.rs
@@ -53,7 +53,7 @@ use core::{marker::PhantomData, ptr::NonNull};
 /// [`struct request`]: srctree/include/linux/blk-mq.h
 ///
 #[repr(transparent)]
-pub struct Request<T: Operations>(Opaque<bindings::request>, PhantomData<T>);
+pub struct Request<T>(Opaque<bindings::request>, PhantomData<T>);
 
 impl<T: Operations> Request<T> {
     /// Create an [`ARef<Request>`] from a [`struct request`] pointer.
@@ -138,6 +138,23 @@ impl<T: Operations> Request<T> {
         Ok(())
     }
 
+    /// Complete the request by scheduling `Operations::complete` for
+    /// execution.
+    ///
+    /// The function may be scheduled locally, via SoftIRQ or remotely via IPMI.
+    /// See `blk_mq_complete_request_remote` in [`blk-mq.c`] for details.
+    ///
+    /// [`blk-mq.c`]: srctree/block/blk-mq.c
+    pub fn complete(this: ARef<Self>) {
+        let ptr = ARef::into_raw(this).cast::<bindings::request>().as_ptr();
+        // SAFETY: By type invariant, `self.0` is a valid `struct request`
+        if !unsafe { bindings::blk_mq_complete_request_remote(ptr) } {
+            // SAFETY: We released a refcount above that we can reclaim here.
+            let this = unsafe { Request::aref_from_raw(ptr) };
+            T::complete(this);
+        }
+    }
+
     /// Return a pointer to the [`RequestDataWrapper`] stored in the private area
     /// of the request structure.
     ///
@@ -151,7 +168,7 @@ impl<T: Operations> Request<T> {
         // valid allocation.
         let wrapper_ptr =
             unsafe { bindings::blk_mq_rq_to_pdu(request_ptr).cast::<RequestDataWrapper>() };
-        // SAFETY: By C API contract, wrapper_ptr points to a valid allocation
+        // SAFETY: By C API contract, `wrapper_ptr` points to a valid allocation
         // and is not null.
         unsafe { NonNull::new_unchecked(wrapper_ptr) }
     }