RE: [PATCH v19 3/3] scsi: ufs: Prepare HPB read for cached sub-region

[Avri Altman]

> > > +     put_unaligned_be64(ppn, &cdb[6]);
> >
> > You are assuming the HPB entries read out by "HPB Read Buffer" cmd
> > are
> > in Little
> > Endian, which is why you are using put_unaligned_be64 here. However,
> > this assumption
> > is not right for all the other flash vendors - HPB entries read out
> > by
> > "HPB Read Buffer"
> > cmd may come in Big Endian, if so, their random read performance are
> > screwed.
> 
> For this question, it is very hard to make a correct format since the
> Spec doesn't give a clear definition. Should we have a default format,
> if there is conflict, and then add quirk or add a vendor-specific
> table?
> 
> Hi Avri
> Do you have a good idea?
I don't know.  Better let Daejun answer this.
This was working for me for both Galaxy S20 (Exynos) as well as Xiaomi Mi10 (8250).

Thanks,
Avri