[PATCH] nvme-auth: Include SC_C in RVAL controller hash

[alistair23]

From: Alistair Francis <alistair.francis@xxxxxxx>

Section 8.3.4.5.5 of the NVMe Base Specification 2.1 describes what is
included in the Response Value (RVAL) hash and SC_C should be included.
Currently we are hardcoding 0 instead of using the correct SC_C value.

Update the host and target code to use the SC_C when calculating the
RVAL instead of using 0.

Fixes: f50fff73d620 ("nvme: implement In-Band authentication")
Signed-off-by: Alistair Francis <alistair.francis@xxxxxxx>
---
 drivers/nvme/host/auth.c   | 2 +-
 drivers/nvme/target/auth.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/nvme/host/auth.c b/drivers/nvme/host/auth.c
index 4e8e4ddd6c8d..4ea1a46bad94 100644
--- a/drivers/nvme/host/auth.c
+++ b/drivers/nvme/host/auth.c
@@ -581,7 +581,7 @@ static int nvme_auth_dhchap_setup_ctrl_response(struct nvme_ctrl *ctrl,
 	ret = crypto_shash_update(shash, buf, 2);
 	if (ret)
 		goto out;
-	memset(buf, 0, 4);
+	*buf = chap->sc_c;
 	ret = crypto_shash_update(shash, buf, 1);
 	if (ret)
 		goto out;
diff --git a/drivers/nvme/target/auth.c b/drivers/nvme/target/auth.c
index 839239fe877a..965690afd1bf 100644
--- a/drivers/nvme/target/auth.c
+++ b/drivers/nvme/target/auth.c
@@ -477,7 +477,7 @@ int nvmet_auth_ctrl_hash(struct nvmet_req *req, u8 *response,
 	ret = crypto_shash_update(shash, buf, 2);
 	if (ret)
 		goto out;
-	memset(buf, 0, 4);
+	*buf = req->sq->sc_c;
 	ret = crypto_shash_update(shash, buf, 1);
 	if (ret)
 		goto out;
-- 
2.53.0