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[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>
This commit is contained in:
Martin K. Petersen 2011-05-18 00:31:07 -04:00 committed by James Bottomley
parent 45d7f0cc58
commit 2a8cfad06e
1 changed files with 2 additions and 1 deletions
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3
drivers/scsi/sd.c
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@ -490,7 +490,8 @@ static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode)
unsigned int max_blocks = 0; unsigned int max_blocks = 0;
q->limits.discard_zeroes_data = sdkp->lbprz; 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 = q->limits.discard_granularity =
max(sdkp->physical_block_size, max(sdkp->physical_block_size,
sdkp->unmap_granularity * logical_block_size); sdkp->unmap_granularity * logical_block_size);