Commit b75a99e1 authored by Danilo Krummrich's avatar Danilo Krummrich
Browse files

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: default avatarAlexandre Courbot <acourbot@nvidia.com>
Acked-by: default avatarBoqun Feng <boqun.feng@gmail.com>
Reviewed-by: default avatarJoel Fernandes <joelagnelf@nvidia.com>
Link: https://lore.kernel.org/r/20250428140137.468709-4-dakr@kernel.org


Signed-off-by: default avatarDanilo Krummrich <dakr@kernel.org>
parent f301cb97

samples/rust/rust_driver_pci.rs

+6 −6
Original line number Diff line number Diff line
@@ -83,12 +83,12 @@ fn probe(pdev: &pci::Device<Core>, info: &Self::IdInfo) -> Result<Pin<KBox<Self> 
            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())

    }