[PATCH 0/5] Rework PCI IRQ vector code

[Danilo Krummrich <dakr@kernel.org>]

This series reworks the Rust PCI interrupt vector abstractions, motivated by
review feedback on the nova-core interrupt support series [1].

Convert IrqVectorRegistration to a lifetime-managed owning type, replacing the
devres-based approach. Add an anchor generic on IrqRequest and irq::Registration
to create a borrow chain that prevents the vector allocation from being dropped
while any IRQ handler is still registered.

Remove IrqVector; resolve a vector index to an IrqRequest directly via
IrqVectorRegistration::request().

Add pci_irq_type() as a C function in include/linux/pci.h, replacing open-coded
checks across drivers [2], and wrap it for Rust.

[1] https://lore.kernel.org/all/20260808031120.363869-1-jhubbard@nvidia.com/
[2] https://elixir.bootlin.com/linux/v7.1/source/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c#L196

Danilo Krummrich (5):
  rust: irq: add anchor generic to IrqRequest and Registration
  rust: pci: convert IrqVectorRegistration to a lifetime-managed owning
    type
  rust: pci: remove IrqVector and resolve IrqRequest directly
  PCI: add pci_irq_type() to query the allocated interrupt type
  rust: pci: expose the allocated interrupt type

 include/linux/pci.h        |  25 +++++
 rust/helpers/pci.c         |   5 +
 rust/kernel/irq.rs         |  10 +-
 rust/kernel/irq/request.rs |  86 +++++++++++----
 rust/kernel/pci.rs         |   2 +-
 rust/kernel/pci/irq.rs     | 213 ++++++++++++++-----------------------
 6 files changed, 182 insertions(+), 159 deletions(-)


base-commit: dbaafe9cc56a996931eedfe043eb34418cc9cd9b
-- 
2.55.0