Re: [PATCH RFC 05/19] iommufd: Add a dirty bitmap to iopt_unmap_iova()

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On 4/29/22 13:14, Jason Gunthorpe wrote:
> On Thu, Apr 28, 2022 at 10:09:19PM +0100, Joao Martins wrote:
> 
>> +static void iommu_unmap_read_dirty_nofail(struct iommu_domain *domain,
>> +					  unsigned long iova, size_t size,
>> +					  struct iommufd_dirty_data *bitmap,
>> +					  struct iommufd_dirty_iter *iter)
>> +{
> 
> This shouldn't be a nofail - that is only for path that trigger from
> destroy/error unwindow, which read dirty never does. The return code
> has to be propogated.
> 
> It needs some more thought how to organize this.. only unfill_domains
> needs this path, but it is shared with the error unwind paths and
> cannot generally fail..

It's part of the reason I splitted this part as it didn't struck as a natural
extension of the API.



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