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sd: Fix discard granularity when LBPRZ=1

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commit 6540a65da9 upstream.

Commit 397737223c ("sd: Make discard granularity match logical block
size when LBPRZ=1") accidentally set the granularity to one byte instead
of one logical block on devices that provide deterministic zeroes after
UNMAP.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Reported-by: Mike Snitzer <snitzer@redhat.com>
Reviewed-by: Ewan Milne <emilne@redhat.com>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Fixes: 397737223c
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Martin K. Petersen
2016-03-05 17:52:02 -05:00
committed by Greg Kroah-Hartman
parent e468298bd4
commit 67aa7e6dd9
1 changed files with 1 additions and 1 deletions
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2
drivers/scsi/sd.c
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@@ -648,7 +648,7 @@ static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode)
*/
if (sdkp->lbprz) {
q->limits.discard_alignment = 0;
q->limits.discard_granularity = 1;
q->limits.discard_granularity = logical_block_size;
} else {
q->limits.discard_alignment = sdkp->unmap_alignment *
logical_block_size;