samples: rust: pci: take advantage of Devres::access()

For the I/O operations executed from the probe() method, take advantage
of Devres::access(), avoiding the atomic check and RCU read lock required
otherwise entirely.

Reviewed-by: Alexandre Courbot <[email protected]>
Acked-by: Boqun Feng <[email protected]>
Reviewed-by: Joel Fernandes <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Danilo Krummrich <[email protected]>

1 files changed, 6 insertions, 6 deletions

diff --git a/samples/rust/rust_driver_pci.rs b/samples/rust/rust_driver_pci.rs
index 9ce3a7323a16..15147e4401b2 100644
--- a/samples/rust/rust_driver_pci.rs
+++ b/samples/rust/rust_driver_pci.rs
@@ -83,12 +83,12 @@ impl pci::Driver for SampleDriver {
             GFP_KERNEL,
         )?;
 
-        let res = drvdata
-            .bar
-            .try_access_with(|b| Self::testdev(info, b))
-            .ok_or(ENXIO)??;
-
-        dev_info!(pdev.as_ref(), "pci-testdev data-match count: {}\n", res);
+        let bar = drvdata.bar.access(pdev.as_ref())?;
+        dev_info!(
+            pdev.as_ref(),
+            "pci-testdev data-match count: {}\n",
+            Self::testdev(info, bar)?
+        );
 
         Ok(drvdata.into())
     }