[Zesty][PATCH 40/44] scsi: cxlflash: Remove zeroing of private command data

[Victor Aoqui]

From: "Matthew R. Ochs" <mrochs at linux.vnet.ibm.com>

BugLink: http://bugs.launchpad.net/bugs/1702521

The SCSI core now zeroes the per-command private data area prior to
calling into the LLD. Replace the clearing operation that takes place
when the private command data reference is obtained with a routine that
performs common initializations. The zeroing that takes place in the
device reset path remains intact as the private command data associated
with the specified SCSI command is not guaranteed to be cleared.

Signed-off-by: Matthew R. Ochs <mrochs at linux.vnet.ibm.com>
Signed-off-by: Uma Krishnan <ukrishn at linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen at oracle.com>
(cherry picked from commit 479ad8e9d48c4d82c92417b012193e967fc33b8a)
Signed-off-by: Victor Aoqui <victora at linux.vnet.ibm.com>
---
 drivers/scsi/cxlflash/common.h | 11 +++++++++--
 drivers/scsi/cxlflash/main.c   |  2 +-
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/cxlflash/common.h b/drivers/scsi/cxlflash/common.h
index e95e5a516b5e..6d95e8e147e0 100644
--- a/drivers/scsi/cxlflash/common.h
+++ b/drivers/scsi/cxlflash/common.h
@@ -178,15 +178,22 @@ static inline struct afu_cmd *sc_to_afuc(struct scsi_cmnd *sc)
 	return PTR_ALIGN(scsi_cmd_priv(sc), __alignof__(struct afu_cmd));
 }
 
-static inline struct afu_cmd *sc_to_afucz(struct scsi_cmnd *sc)
+static inline struct afu_cmd *sc_to_afuci(struct scsi_cmnd *sc)
 {
 	struct afu_cmd *afuc = sc_to_afuc(sc);
 
-	memset(afuc, 0, sizeof(*afuc));
 	INIT_LIST_HEAD(&afuc->queue);
 	return afuc;
 }
 
+static inline struct afu_cmd *sc_to_afucz(struct scsi_cmnd *sc)
+{
+	struct afu_cmd *afuc = sc_to_afuc(sc);
+
+	memset(afuc, 0, sizeof(*afuc));
+	return sc_to_afuci(sc);
+}
+
 struct hwq {
 	/* Stuff requiring alignment go first. */
 	struct sisl_ioarcb sq[NUM_SQ_ENTRY];		/* 16K SQ */
diff --git a/drivers/scsi/cxlflash/main.c b/drivers/scsi/cxlflash/main.c
index 0cce442c260a..43389825299a 100644
--- a/drivers/scsi/cxlflash/main.c
+++ b/drivers/scsi/cxlflash/main.c
@@ -543,7 +543,7 @@ static int cxlflash_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scp)
 	struct cxlflash_cfg *cfg = shost_priv(host);
 	struct afu *afu = cfg->afu;
 	struct device *dev = &cfg->dev->dev;
-	struct afu_cmd *cmd = sc_to_afucz(scp);
+	struct afu_cmd *cmd = sc_to_afuci(scp);
 	struct scatterlist *sg = scsi_sglist(scp);
 	int hwq_index = cmd_to_target_hwq(host, scp, afu);
 	struct hwq *hwq = get_hwq(afu, hwq_index);
-- 
2.11.0