Re: [PATCH] sd: Consider max_xfer_blocks if opt_xfer_blocks is unusable

[Martin K. Petersen]

Fam Zheng <famz@xxxxxxxxxx> writes:

Hi Fam,

> --- a/drivers/scsi/sd.c
> +++ b/drivers/scsi/sd.c
> @@ -2957,6 +2957,7 @@ static int sd_revalidate_disk(struct gendisk *disk)
>  		rw_max = logical_to_sectors(sdp, sdkp->opt_xfer_blocks);
>  	} else
>  		rw_max = BLK_DEF_MAX_SECTORS;
> +	rw_max = min_not_zero(rw_max, dev_max);

rw_max is in sectors, dev_max is in logical blocks.

>  
>  	/* Combine with controller limits */
>  	q->limits.max_sectors = min(rw_max, queue_max_hw_sectors(q));

-- 
Martin K. Petersen	Oracle Linux Engineering