mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-06-21 15:43:21 +02:00
Danilo Krummrich
a3f09f8e47
Add a 'bound lifetime to the associated Data, changing type Data to type Data<'bound>. This allows the driver's bus device private data to capture the device / driver bound lifetime; device resources can be stored directly by reference rather than requiring Devres. The probe() and disconnect() callbacks thus gain a 'bound lifetime parameter on the methods themselves; avoiding a global lifetime on the trait impl. Existing drivers set type Data<'bound> = Self, preserving the current behavior. Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Eliot Courtney <ecourtney@nvidia.com> Reviewed-by: Gary Guo <gary@garyguo.net> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Link: https://patch.msgid.link/20260525202921.124698-16-dakr@kernel.org Signed-off-by: Danilo Krummrich <dakr@kernel.org>
56 lines
1.3 KiB
Rust
56 lines
1.3 KiB
Rust
// SPDX-License-Identifier: GPL-2.0
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// SPDX-FileCopyrightText: Copyright (C) 2025 Collabora Ltd.
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//! Rust USB driver sample.
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use kernel::{
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device::{
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self,
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Core, //
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},
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prelude::*,
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sync::aref::ARef,
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usb, //
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};
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struct SampleDriver {
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_intf: ARef<usb::Interface>,
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}
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kernel::usb_device_table!(
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USB_TABLE,
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MODULE_USB_TABLE,
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<SampleDriver as usb::Driver>::IdInfo,
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[(usb::DeviceId::from_id(0x1234, 0x5678), ()),]
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);
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impl usb::Driver for SampleDriver {
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type IdInfo = ();
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type Data<'bound> = Self;
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const ID_TABLE: usb::IdTable<Self::IdInfo> = &USB_TABLE;
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fn probe<'bound>(
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intf: &'bound usb::Interface<Core<'_>>,
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_id: &usb::DeviceId,
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_info: &'bound Self::IdInfo,
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) -> impl PinInit<Self, Error> + 'bound {
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let dev: &device::Device<Core<'_>> = intf.as_ref();
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dev_info!(dev, "Rust USB driver sample probed\n");
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Ok(Self { _intf: intf.into() })
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}
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fn disconnect<'bound>(intf: &'bound usb::Interface<Core<'_>>, _data: Pin<&Self>) {
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let dev: &device::Device<Core<'_>> = intf.as_ref();
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dev_info!(dev, "Rust USB driver sample disconnected\n");
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}
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}
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kernel::module_usb_driver! {
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type: SampleDriver,
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name: "rust_driver_usb",
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authors: ["Daniel Almeida"],
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description: "Rust USB driver sample",
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license: "GPL v2",
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}
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