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

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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: Danilo Krummrich <dakr@kernel.org>
This commit is contained in:
Danilo Krummrich 2025-06-21 21:43:34 +02:00
parent 18ebb25dfa
commit 5f512533b7
1 changed files with 10 additions and 1 deletions
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11
samples/rust/rust_driver_pci.rs
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@ -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]