nvmet-auth: return the error code to the nvmet_auth_host_hash() callers

If the nvmet_auth_host_hash() function fails, the error code should
be returned to its callers.
Signed-off-by: Maurizio Lombardi <mlombard@redhat.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>

drivers/nvme/target/auth.c

@@ -370,7 +370,7 @@ int nvmet_auth_host_hash(struct nvmet_req *req, u8 *response,
 	nvme_auth_free_key(transformed_key);
 out_free_tfm:
 	crypto_free_shash(shash_tfm);
-	return 0;
+	return ret;
 }
 
 int nvmet_auth_ctrl_hash(struct nvmet_req *req, u8 *response,