Re: [PATCH v4 4/5] scsi: hisi_sas: Add support for DIF feature for v3 hw

[Martin K. Petersen]

John,

> We have an issue with using scsi_transfer_length().
>
> As I understand, for our controller we need to set the host structure
> data transfer size to the size of data to write to the disk for WRITE
> type command, and at size of info received to host memory for READ
> type command. As such, for READ STRIP, we only want the SCSI buf len,
> and not the scsi buf len and PI (this is what scsi_transfer_length()
> provides).

Interesting asymmetry.

-- 
Martin K. Petersen	Oracle Linux Engineering