Danilo Krummrich 98c63ce4d7 rust: irq: make Registration compatible with lifetime-bound drivers ...

Adapt the IRQ registration to work with the Higher-Ranked Lifetime Types
(HRT) device driver architecture introduced in commit 2c7c659336
("Merge patch series "rust: device: Higher-Ranked Lifetime Types for
device drivers"").

With HRT, driver structs carry a lifetime parameter tied to the device
binding scope, allowing device resources such as pci::Bar<'bar> to be
held directly rather than through Devres indirection. However, the IRQ
abstraction required Handler: Sync + 'static, preventing handlers from
embedding lifetime-parameterized resources.

Remove the 'static bound from Handler and ThreadedHandler and replace
the Devres<RegistrationInner> indirection with direct request_irq() /
free_irq() calls in the constructor and PinnedDrop.  Registration<'a, T>
stores the IrqRequest<'a>, which structurally ties it to the device
binding scope.

Also remove the &Device<Bound> parameter from the handler callbacks,
since handlers that need device access can embed it in their own type.

IRQ handlers can now directly own device resources:

	struct IrqHandler<'irq> {
	    bar: pci::Bar<'irq, BAR_SIZE>,
	}

	impl irq::Handler for IrqHandler<'_> {
	    fn handle(&self) -> IrqReturn {
	        let stat = self.bar.read(regs::STAT);
	        ...
	    }
	}

This eliminates the indirection previously required for IRQ handlers to
access device resources and aligns with the broader goal of expressing
every registration scoped to a driver binding through compile-time
lifetime bounds.

Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com>
Reviewed-by: Gary Guo <gary@garyguo.net>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Link: https://patch.msgid.link/20260719153631.559341-1-dakr@kernel.org
Signed-off-by: Danilo Krummrich <dakr@kernel.org>

2026-08-04 23:30:34 +02:00

..

flags.rs

rust: irq: always inline functions using build_assert with arguments

2026-01-14 20:32:28 +01:00

request.rs

rust: irq: make Registration compatible with lifetime-bound drivers

2026-08-04 23:30:34 +02:00