Try to use a write same with unmap bit variant if the device supports it
and the caller allows for it.
Signed-off-by: Christoph Hellwig <h...@lst.de>
Reviewed-by: Martin K. Petersen <martin.peter...@oracle.com>
Reviewed-by: Hannes Reinecke <h...@suse.com>
---
drivers/scsi/sd.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index d8d9c0bdd93c..001593ed0444 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -803,6 +803,15 @@ static int sd_setup_write_zeroes_cmnd(struct scsi_cmnd
*cmd)
u64 sector = blk_rq_pos(rq) >> (ilog2(sdp->sector_size) - 9);
u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9);
+ if (!(rq->cmd_flags & REQ_NOUNMAP)) {
+ switch (sdkp->provisioning_mode) {
+ case SD_LBP_WS16:
+ return sd_setup_write_same16_cmnd(cmd, true);
+ case SD_LBP_WS10:
+ return sd_setup_write_same10_cmnd(cmd, true);
+ }
+ }
+
if (sdp->no_write_same)
return BLKPREP_INVALID;
if (sdkp->ws16 || sector > 0xffffffff || nr_sectors > 0xffff)
--
2.11.0
--
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