* [PATCH] sd: Unmap discard alignment needs to be converted to bytes
@ 2011-05-18 4:31 Martin K. Petersen
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From: Martin K. Petersen @ 2011-05-18 4:31 UTC (permalink / raw)
To: James Bottomley; +Cc: linux-scsi
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>
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index bd0806e..1c69c14 100644
--- 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);
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2011-05-18 4:31 [PATCH] sd: Unmap discard alignment needs to be converted to bytes Martin K. Petersen
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