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DMA allocations carry device resources (e.g. IOMMU mappings) that must not outlive the device's bound lifetime. Add lifetime parameters to the DMA allocation types (Coherent, CoherentBox, CoherentHandle) to enforce at compile time that they are freed before the device is unbound. Since DMA types with lifetime parameters are exposed through debugfs in the nova-core driver, first drop the unnecessary T: 'static bound from the debugfs ScopedDir file creation methods by formalizing a type invariant on FileOps. This is a stable tag for other trees to merge. -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQS2q/xV6QjXAdC7k+1FlHeO1qrKLgUCap13MgAKCRBFlHeO1qrK Ls1tAP9ugwnM86l9VMAN/oe82DKYLdrtM3CE1exgPBVyfXKICAD+Ky8yR7PDuN+6 G9NInskajlb5+bzCWBpbt7Y2XylmDAw= =AwqP -----END PGP SIGNATURE----- Merge patch series "rust: dma: tie DMA allocations to the device's bound lifetime" Danilo Krummrich <dakr@kernel.org> says: DMA allocations carry device resources (e.g. IOMMU mappings) that must not outlive the device's bound lifetime. Add lifetime parameters to the DMA allocation types (Coherent, CoherentBox, CoherentHandle) to enforce at compile time that they are freed before the device is unbound. Since DMA types with lifetime parameters are exposed through debugfs in the nova-core driver, first drop the unnecessary T: 'static bound from the debugfs ScopedDir file creation methods by formalizing a type invariant on FileOps. Link: https://patch.msgid.link/20260830193824.471089-1-dakr@kernel.org Signed-off-by: Danilo Krummrich <dakr@kernel.org> |
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