[PATCH v5 4/5] sd: limit to use write life hints

Kanchan Joshi
2024-09-10T15:11:10Z

From: Nitesh Shetty <nj.shetty@samsung.com>

The incoming hint value maybe either lifetime hint or placement hint.
Make SCSI interpret only temperature-based write lifetime hints.

Signed-off-by: Nitesh Shetty <nj.shetty@samsung.com>
Signed-off-by: Kanchan Joshi <joshi.k@samsung.com>
---
drivers/scsi/sd.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index dad3991397cf..82bd4b07314e 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1191,8 +1191,8 @@ static u8 sd_group_number(struct scsi_cmnd *cmd)
if (!sdkp->rscs)
return 0;

- return min3((u32)rq->write_hint, (u32)sdkp->permanent_stream_count,
- 0x3fu);
+ return min3((u32)WRITE_LIFETIME_HINT(rq->write_hint),
+ (u32)sdkp->permanent_stream_count, 0x3fu);
}

static blk_status_t sd_setup_rw32_cmnd(struct scsi_cmnd *cmd, bool write,
@@ -1390,7 +1390,8 @@ static blk_status_t sd_setup_read_write_cmnd(struct scsi_cmnd *cmd)
ret = sd_setup_rw16_cmnd(cmd, write, lba, nr_blocks,
protect | fua, dld);
} else if ((nr_blocks > 0xff) || (lba > 0x1fffff) ||
- sdp->use_10_for_rw || protect || rq->write_hint) {
+ sdp->use_10_for_rw || protect ||
+ WRITE_LIFETIME_HINT(rq->write_hint)) {
ret = sd_setup_rw10_cmnd(cmd, write, lba, nr_blocks,
protect | fua);
} else {
--
2.25.1