From: Marko Turk <mt@markoturk.info>
Date: Wed, 10 Dec 2025 11:25:51 +0000 (+0100)
Subject: samples: rust: fix endianness issue in rust_driver_pci
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e2f1081ca8f18c146e8f928486deac61eca2b517;p=thirdparty%2Flinux.git

samples: rust: fix endianness issue in rust_driver_pci

MMIO backend of PCI Bar always assumes little-endian devices and
will convert to CPU endianness automatically. Remove the u32::from_le
conversion which would cause a bug on big-endian machines.

Cc: stable@vger.kernel.org
Reviewed-by: Dirk Behme <dirk.behme@de.bosch.com>
Signed-off-by: Marko Turk <mt@markoturk.info>
Fixes: 685376d18e9a ("samples: rust: add Rust PCI sample driver")
Link: https://patch.msgid.link/20251210112503.62925-2-mt@markoturk.info
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
---

diff --git a/samples/rust/rust_driver_pci.rs b/samples/rust/rust_driver_pci.rs
index 5823787bea8ec..fa677991a5c45 100644
--- a/samples/rust/rust_driver_pci.rs
+++ b/samples/rust/rust_driver_pci.rs
@@ -48,7 +48,7 @@ impl SampleDriver {
         // Select the test.
         bar.write8(index.0, Regs::TEST);
 
-        let offset = u32::from_le(bar.read32(Regs::OFFSET)) as usize;
+        let offset = bar.read32(Regs::OFFSET) as usize;
         let data = bar.read8(Regs::DATA);
 
         // Write `data` to `offset` to increase `count` by one.