4 files changed, 21 insertions, 40 deletions

diff --git a/drivers/nvme/target/admin-cmd.c b/drivers/nvme/target/admin-cmd.c
index 5f15c3285a5b..cd60a8184d04 100644
--- a/drivers/nvme/target/admin-cmd.c
+++ b/drivers/nvme/target/admin-cmd.c
@@ -313,22 +313,6 @@ static void nvmet_execute_get_log_page(struct nvmet_req *req)
 	nvmet_req_complete(req, NVME_SC_INVALID_FIELD | NVME_SC_DNR);
 }
 
-static u16 nvmet_set_model_number(struct nvmet_subsys *subsys)
-{
-	u16 status = 0;
-
-	mutex_lock(&subsys->lock);
-	if (!subsys->model_number) {
-		subsys->model_number =
-			kstrdup(NVMET_DEFAULT_CTRL_MODEL, GFP_KERNEL);
-		if (!subsys->model_number)
-			status = NVME_SC_INTERNAL;
-	}
-	mutex_unlock(&subsys->lock);
-
-	return status;
-}
-
 static void nvmet_execute_identify_ctrl(struct nvmet_req *req)
 {
 	struct nvmet_ctrl *ctrl = req->sq->ctrl;
@@ -343,16 +327,6 @@ static void nvmet_execute_identify_ctrl(struct nvmet_req *req)
 		mutex_unlock(&subsys->lock);
 	}
 
-	/*
-	 * If there is no model number yet, set it now.  It will then remain
-	 * stable for the life time of the subsystem.
-	 */
-	if (!subsys->model_number) {
-		status = nvmet_set_model_number(subsys);
-		if (status)
-			goto out;
-	}
-
 	id = kzalloc(sizeof(*id), GFP_KERNEL);
 	if (!id) {
 		status = NVME_SC_INTERNAL;
diff --git a/drivers/nvme/target/configfs.c b/drivers/nvme/target/configfs.c
index a13da86fb374..9ef8708b92c6 100644
--- a/drivers/nvme/target/configfs.c
+++ b/drivers/nvme/target/configfs.c
@@ -1154,14 +1154,8 @@ static ssize_t nvmet_subsys_attr_model_show(struct config_item *item,
 					    char *page)
 {
 	struct nvmet_subsys *subsys = to_subsys(item);
-	int ret;
-
-	mutex_lock(&subsys->lock);
-	ret = snprintf(page, PAGE_SIZE, "%s\n", subsys->model_number ?
-			subsys->model_number : NVMET_DEFAULT_CTRL_MODEL);
-	mutex_unlock(&subsys->lock);
 
-	return ret;
+	return snprintf(page, PAGE_SIZE, "%s\n", subsys->model_number);
 }
 
 static ssize_t nvmet_subsys_attr_model_store_locked(struct nvmet_subsys *subsys,
@@ -1169,7 +1163,7 @@ static ssize_t nvmet_subsys_attr_model_store_locked(struct nvmet_subsys *subsys,
 {
 	int pos = 0, len;
 
-	if (subsys->model_number) {
+	if (subsys->subsys_discovered) {
 		pr_err("Can't set model number. %s is already assigned\n",
 		       subsys->model_number);
 		return -EINVAL;
diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c
index 213a0c2af4f7..146909486b8f 100644
--- a/drivers/nvme/target/core.c
+++ b/drivers/nvme/target/core.c
@@ -1494,6 +1494,7 @@ struct nvmet_subsys *nvmet_subsys_alloc(const char *subsysnqn,
 {
 	struct nvmet_subsys *subsys;
 	char serial[NVMET_SN_MAX_SIZE / 2];
+	int ret;
 
 	subsys = kzalloc(sizeof(*subsys), GFP_KERNEL);
 	if (!subsys)
@@ -1504,6 +1505,12 @@ struct nvmet_subsys *nvmet_subsys_alloc(const char *subsysnqn,
 	get_random_bytes(&serial, sizeof(serial));
 	bin2hex(subsys->serial, &serial, sizeof(serial));
 
+	subsys->model_number = kstrdup(NVMET_DEFAULT_CTRL_MODEL, GFP_KERNEL);
+	if (!subsys->model_number) {
+		ret = -ENOMEM;
+		goto free_subsys;
+	}
+
 	switch (type) {
 	case NVME_NQN_NVME:
 		subsys->max_qid = NVMET_NR_QUEUES;
@@ -1513,15 +1520,15 @@ struct nvmet_subsys *nvmet_subsys_alloc(const char *subsysnqn,
 		break;
 	default:
 		pr_err("%s: Unknown Subsystem type - %d\n", __func__, type);
-		kfree(subsys);
-		return ERR_PTR(-EINVAL);
+		ret = -EINVAL;
+		goto free_mn;
 	}
 	subsys->type = type;
 	subsys->subsysnqn = kstrndup(subsysnqn, NVMF_NQN_SIZE,
 			GFP_KERNEL);
 	if (!subsys->subsysnqn) {
-		kfree(subsys);
-		return ERR_PTR(-ENOMEM);
+		ret = -ENOMEM;
+		goto free_mn;
 	}
 	subsys->cntlid_min = NVME_CNTLID_MIN;
 	subsys->cntlid_max = NVME_CNTLID_MAX;
@@ -1533,6 +1540,12 @@ struct nvmet_subsys *nvmet_subsys_alloc(const char *subsysnqn,
 	INIT_LIST_HEAD(&subsys->hosts);
 
 	return subsys;
+
+free_mn:
+	kfree(subsys->model_number);
+free_subsys:
+	kfree(subsys);
+	return ERR_PTR(ret);
 }
 
 static void nvmet_subsys_free(struct kref *ref)
diff --git a/drivers/nvme/target/discovery.c b/drivers/nvme/target/discovery.c
index b7fdad13094a..7aa62bc6ae84 100644
--- a/drivers/nvme/target/discovery.c
+++ b/drivers/nvme/target/discovery.c
@@ -244,7 +244,6 @@ static void nvmet_execute_disc_identify(struct nvmet_req *req)
 {
 	struct nvmet_ctrl *ctrl = req->sq->ctrl;
 	struct nvme_id_ctrl *id;
-	const char model[] = "Linux";
 	u16 status = 0;
 
 	if (!nvmet_check_transfer_len(req, NVME_IDENTIFY_DATA_SIZE))
@@ -264,7 +263,8 @@ static void nvmet_execute_disc_identify(struct nvmet_req *req)
 
 	memcpy(id->sn, ctrl->subsys->serial, NVMET_SN_MAX_SIZE);
 	memset(id->fr, ' ', sizeof(id->fr));
-	memcpy_and_pad(id->mn, sizeof(id->mn), model, sizeof(model) - 1, ' ');
+	memcpy_and_pad(id->mn, sizeof(id->mn), ctrl->subsys->model_number,
+		       strlen(ctrl->subsys->model_number), ' ');
 	memcpy_and_pad(id->fr, sizeof(id->fr),
 		       UTS_RELEASE, strlen(UTS_RELEASE), ' ');