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

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commit d0eb20a863ba7dc1d3f4b841639671f134560be2 upstream.

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
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Martin K. Petersen
2016-01-20 11:01:23 -05:00
committed by Greg Kroah-Hartman
parent 01c3c0f921
commit f313f1d809
1 changed files with 1 additions and 1 deletions
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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 * sdp->sector_size >= PAGE_CACHE_SIZE)
rw_max = q->limits.io_opt =
logical_to_sectors(sdp, sdkp->opt_xfer_blocks);
sdkp->opt_xfer_blocks * sdp->sector_size;
else
rw_max = BLK_DEF_MAX_SECTORS;