RE: [PATCH v11 15/16] iommu: Make iopf_group_response() return void

[Tian, Kevin]

> From: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
> Sent: Tuesday, January 30, 2024 4:09 PM
> 
> The iopf_group_response() should return void, as nothing can do anything
> with the failure. This implies that ops->page_response() must also return
> void; this is consistent with what the drivers do. The failure paths,
> which are all integrity validations of the fault, should be WARN_ON'd,
> not return codes.
> 
> If the iommu core fails to enqueue the fault, it should respond the fault
> directly by calling ops->page_response() instead of returning an error
> number and relying on the iommu drivers to do so. Consolidate the error
> fault handling code in the core.
> 
> Co-developed-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
> Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
> Signed-off-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>

Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>