Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote:
> On Wed, 16 Jul 2008, Elias Oltmanns wrote:
>
>> Oh, I see. The name fooled me there, I suppose. So, the meaning of
>> req->data_len is inverted, as it were, when the LLDD performs the data
>> transfer, right?
>
> The inversion takes place in the midlayer, not in the LLDD. Take a
> look inside scsi_io_completion():
>
> if (blk_pc_request(req)) { /* SG_IO ioctl from block level */
> ...
> req->data_len = scsi_get_resid(cmd);
> }
Right, thanks for the hint.
Regards,
Elias
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