Re: [PATCH 2/4] rust: dma: tie CoherentHandle to the device's bound lifetime

[Gary Guo]

On Sun Aug 30, 2026 at 8:37 PM BST, Danilo Krummrich wrote:
> Add a lifetime parameter to CoherentHandle that ties the DMA allocation
> to the device's bound scope, ensuring it is freed before the device is
> unbound.
> 
> DMA allocations carry device resources (e.g. IOMMU mappings) that must
> not outlive the device's bound lifetime. Without a lifetime parameter,
> there was no compile-time enforcement that a CoherentHandle is dropped
> before the device is unbound.
> 
> Signed-off-by: Danilo Krummrich <dakr@xxxxxxxxxx>

Reviewed-by: Gary Guo <gary@xxxxxxxxxxx>

> ---
>  drivers/gpu/nova-core/fb.rs |  2 +-
>  rust/kernel/dma.rs          | 20 ++++++++++----------
>  2 files changed, 11 insertions(+), 11 deletions(-)