> Hi Daejun > > Thanks for your hard-working on the HPB driver. > > I found you didn't take into account of allocation Length of the last > sub-region of the last region. > > UFS HPB spec: > > "If the requested field of the HPB Region or HPB Sub-Region is out of > range, then the device shall terminate the command by sending RESPONSE > UPIU with CHECK CONDITION status, with the SENSE KEY set to ILLEGAL > REQUEST, and the additional sense code set to INVALID FIELD IN CDB" You don't need to worry about setting invalid ppn to HPB-READ command - you'll never get a read request for those LBAs.
Say all subregions are 16MB and the last subregion of the last region is 10MB. Keep all sizes the same - 16MB, and the ppn of the last subregion contain some invalid data. But you'll never get a read request for those LBAs anyway - they don't exist, so you'll never get to use those invalid ppns. Thanks, Avri
