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sd: Optimal I/O size is in bytes, not sectors

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Commit ca369d51b3 ("block/sd: Fix device-imposed transfer length
limits") accidentally switched optimal I/O size reporting from bytes to
block layer sectors.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Reported-by: Christian Borntraeger <borntraeger@de.ibm.com>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Fixes: ca369d51b3
Cc: stable@vger.kernel.org # 4.4+
Reviewed-by: James E.J. Bottomley <James.Bottomley@HansenPartnership.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Reviewed-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
This commit is contained in:
Martin K. Petersen 2016-01-20 11:01:23 -05:00
parent c142ce0d3c
commit d0eb20a863
1 changed files with 1 additions and 1 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/scsi/sd.c
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@ -2893,7 +2893,7 @@ static int sd_revalidate_disk(struct gendisk *disk)
sdkp->opt_xfer_blocks <= SD_DEF_XFER_BLOCKS && sdkp->opt_xfer_blocks <= SD_DEF_XFER_BLOCKS &&
sdkp->opt_xfer_blocks * sdp->sector_size >= PAGE_CACHE_SIZE) sdkp->opt_xfer_blocks * sdp->sector_size >= PAGE_CACHE_SIZE)
rw_max = q->limits.io_opt = rw_max = q->limits.io_opt =
logical_to_sectors(sdp, sdkp->opt_xfer_blocks); sdkp->opt_xfer_blocks * sdp->sector_size;
else else
rw_max = BLK_DEF_MAX_SECTORS; rw_max = BLK_DEF_MAX_SECTORS;