[dm-devel] [PATCH 02/15] scsi/osd: don't save block errors into req_results

[Bart Van Assche]

On Thu, 2017-05-18 at 15:17 +0200, Christoph Hellwig wrote:
> We will only have sense data if the command exectured and got a SCSI
> result, so this is pointless.
> 
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> ---
>  drivers/scsi/osd/osd_initiator.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/scsi/osd/osd_initiator.c b/drivers/scsi/osd/osd_initiator.c
> index 8a1b94816419..14785177ce7b 100644
> --- a/drivers/scsi/osd/osd_initiator.c
> +++ b/drivers/scsi/osd/osd_initiator.c
> @@ -477,7 +477,7 @@ static void _set_error_resid(struct osd_request *or, struct request *req,
>  			     int error)
>  {
>  	or->async_error = error;
> -	or->req_errors = scsi_req(req)->result ? : error;
> +	or->req_errors = scsi_req(req)->result;
>  	or->sense_len = scsi_req(req)->sense_len;
>  	if (or->sense_len)
>  		memcpy(or->sense, scsi_req(req)->sense, or->sense_len);

Hello Christoph,

Are you sure that that code is not necessary? From osd_initiator.c:

static void _put_request(struct request *rq)
{
	/*
	 * If osd_finalize_request() was called but the request was not
	 * executed through the block layer, then we must release BIOs.
	 * TODO: Keep error code in or->async_error. Need to audit all
	 *       code paths.
	 */
	if (unlikely(rq->bio))
		blk_end_request(rq, -ENOMEM, blk_rq_bytes(rq));
	else
		blk_put_request(rq);
}

Bart.