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

From	"Martin K. Petersen" <martin.petersen@oracle.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH] sd: Consider max_xfer_blocks if opt_xfer_blocks is unusable
Date	2017-03-28 04:20 +0200
Message-ID	<tpOTM-P6-11@gated-at.bofh.it> (permalink)
References	<tpDOG-Ur-23@gated-at.bofh.it>
Organization	Oracle Corporation

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Fam Zheng <famz@redhat.com> 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

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[PATCH] sd: Consider max_xfer_blocks if opt_xfer_blocks is unusable Fam Zheng <famz@redhat.com> - 2017-03-27 16:30 +0200
  Re: [PATCH] sd: Consider max_xfer_blocks if opt_xfer_blocks is  unusable Laurence Oberman <loberman@redhat.com> - 2017-03-27 18:10 +0200
  Re: [PATCH] sd: Consider max_xfer_blocks if opt_xfer_blocks is unusable "Martin K. Petersen" <martin.petersen@oracle.com> - 2017-03-28 04:20 +0200

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