[SCSI] sd: Unmap discard alignment needs to be converted to bytes

The block layer discard alignment is reported in bytes, not in units of
the logical block size.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: James Bottomley <jbottomley@parallels.com>

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index bd0806e..1c69c14 100644 (file)
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -490,7 +490,8 @@ static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode)
        unsigned int max_blocks = 0;
 
        q->limits.discard_zeroes_data = sdkp->lbprz;
-       q->limits.discard_alignment = sdkp->unmap_alignment;
+       q->limits.discard_alignment = sdkp->unmap_alignment *
+               logical_block_size;
        q->limits.discard_granularity =
                max(sdkp->physical_block_size,
                    sdkp->unmap_granularity * logical_block_size);