rust: miscdevice: fix warning on c_uint to u32 cast

When building miscdevice with clippy warnings, the following warning is
emitted:

	warning: casting to the same type is unnecessary (`u32` -> `u32`)
	   --> /home/aliceryhl/rust-for-linux/rust/kernel/miscdevice.rs:220:28
	    |
	220 |     match T::ioctl(device, cmd as u32, arg as usize) {
	    |                            ^^^^^^^^^^ help: try: `cmd`
	    |
	    = help: for further information visit
	      https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast
	    = note: `-W clippy::unnecessary-cast` implied by `-W clippy::all`
	    = help: to override `-W clippy::all` add `#[allow(clippy::unnecessary_cast)]`

Thus, fix it.

Signed-off-by: Alice Ryhl <aliceryhl@google.com>
Link: https://lore.kernel.org/r/20241015-miscdevice-cint-cast-v1-1-fcf4b75700ac@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/rust/kernel/miscdevice.rs b/rust/kernel/miscdevice.rs
index cbd5249b5b45d2fd3ade4517875935a1a893f0a2..50885fb511bf2b6bee17e74b1c3a3b68359726c9 100644 (file)
--- a/rust/kernel/miscdevice.rs
+++ b/rust/kernel/miscdevice.rs
@@ -217,7 +217,7 @@ unsafe extern "C" fn fops_ioctl<T: MiscDevice>(
     // SAFETY: Ioctl calls can borrow the private data of the file.
     let device = unsafe { <T::Ptr as ForeignOwnable>::borrow(private) };
 
-    match T::ioctl(device, cmd as u32, arg as usize) {
+    match T::ioctl(device, cmd, arg as usize) {
         Ok(ret) => ret as c_long,
         Err(err) => err.to_errno() as c_long,
     }
@@ -234,7 +234,7 @@ unsafe extern "C" fn fops_compat_ioctl<T: MiscDevice>(
     // SAFETY: Ioctl calls can borrow the private data of the file.
     let device = unsafe { <T::Ptr as ForeignOwnable>::borrow(private) };
 
-    match T::compat_ioctl(device, cmd as u32, arg as usize) {
+    match T::compat_ioctl(device, cmd, arg as usize) {
         Ok(ret) => ret as c_long,
         Err(err) => err.to_errno() as c_long,
     }