Try to use a write same with unmap bit variant if the device supports it
and the caller asks for it.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
drivers/scsi/sd.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index b6f70a09a301..ca96bb33471b 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -871,6 +871,16 @@ static int sd_setup_write_zeroes_cmnd(struct scsi_cmnd *cmd)
return BLKPREP_INVALID;
return sd_setup_ata_trim_cmnd(cmd);
}
+
+ if (rq->cmd_flags & REQ_UNMAP) {
+ 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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