Commit 5f512533 authored by Danilo Krummrich's avatar Danilo Krummrich
Browse files

samples: rust: pci: reset pci-testdev in unbind() 

Reset the pci-testdev when the driver is unbound from its device.

Link: https://lore.kernel.org/r/20250621195118.124245-9-dakr@kernel.org


Signed-off-by: default avatarDanilo Krummrich <dakr@kernel.org>
parent 18ebb25d

samples/rust/rust_driver_pci.rs

+10 −1
Original line number Diff line number Diff line
@@ -18,7 +18,7 @@ impl Regs { 


type Bar0 = pci::Bar<{ Regs::END }>;



#[derive(Debug)]

#[derive(Copy, Clone, Debug)]

struct TestIndex(u8);



impl TestIndex {
@@ -30,6 +30,7 @@ struct SampleDriver { 
    pdev: ARef<pci::Device>,

    #[pin]

    bar: Devres<Bar0>,

    index: TestIndex,

}



kernel::pci_device_table!(
@@ -79,6 +80,7 @@ fn probe(pdev: &pci::Device<Core>, info: &Self::IdInfo) -> Result<Pin<KBox<Self> 
            try_pin_init!(Self {

                pdev: pdev.into(),

                bar <- pdev.iomap_region_sized::<{ Regs::END }>(0, c_str!("rust_driver_pci")),

                index: *info,

            }),

            GFP_KERNEL,

        )?;
@@ -92,6 +94,13 @@ fn probe(pdev: &pci::Device<Core>, info: &Self::IdInfo) -> Result<Pin<KBox<Self> 


        Ok(drvdata)

    }



    fn unbind(pdev: &pci::Device<Core>, this: Pin<&Self>) {

        if let Ok(bar) = this.bar.access(pdev.as_ref()) {

            // Reset pci-testdev by writing a new test index.

            bar.write8(this.index.0, Regs::TEST);

        }

    }

}



#[pinned_drop]