[PATCH] nvme: make nvme_add_ns{_head}_cdev return void

[John Garry]

The return code from nvme_add_ns_head_cdev() and nvme_add_ns_cdev() is
never checked, so make those functions return void.

A cdev add failure is tolerated during initialization, and flags
NVME_NS_CDEV_LIVE and NVME_NSHEAD_CDEV_LIVE are for determining whether
a cdev needs to be deleted during un-initialization.

Signed-off-by: John Garry <john.g.garry at oracle.com>

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index c6930e43cfea2..eb268148acec9 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -3943,24 +3943,21 @@ static const struct file_operations nvme_ns_chr_fops = {
 	.uring_cmd_iopoll = nvme_ns_chr_uring_cmd_iopoll,
 };
 
-static int nvme_add_ns_cdev(struct nvme_ns *ns)
+static void nvme_add_ns_cdev(struct nvme_ns *ns)
 {
-	int ret;
 	char name[32];
 
 	ns->cdev_device.parent = ns->ctrl->device;
 	snprintf(name, sizeof(name), "ng%dn%d", ns->ctrl->instance,
 		 ns->head->instance);
 
-	ret = nvme_cdev_add(name, &ns->cdev, &ns->cdev_device,
-			    &nvme_ns_chr_fops, ns->ctrl->ops->module);
-	if (ret) {
+	if (nvme_cdev_add(name, &ns->cdev, &ns->cdev_device,
+			&nvme_ns_chr_fops, ns->ctrl->ops->module)) {
 		dev_err(ns->ctrl->device, "Unable to create the %s device\n",
 			name);
-	} else {
-		set_bit(NVME_NS_CDEV_LIVE, &ns->flags);
+		return;
 	}
-	return ret;
+	set_bit(NVME_NS_CDEV_LIVE, &ns->flags);
 }
 
 static struct nvme_ns_head *nvme_alloc_ns_head(struct nvme_ctrl *ctrl,
diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index 9cd49e2f760d0..9b9a657fa330f 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -639,24 +639,21 @@ static const struct file_operations nvme_ns_head_chr_fops = {
 	.uring_cmd_iopoll = nvme_ns_chr_uring_cmd_iopoll,
 };
 
-static int nvme_add_ns_head_cdev(struct nvme_ns_head *head)
+static void nvme_add_ns_head_cdev(struct nvme_ns_head *head)
 {
-	int ret;
 	char name[32];
 
 	head->cdev_device.parent = &head->subsys->dev;
 	snprintf(name, sizeof(name), "ng%dn%d", head->subsys->instance,
 		 head->instance);
 
-	ret = nvme_cdev_add(name, &head->cdev, &head->cdev_device,
-			    &nvme_ns_head_chr_fops, THIS_MODULE);
-	if (ret) {
+	if (nvme_cdev_add(name, &head->cdev, &head->cdev_device,
+			&nvme_ns_head_chr_fops, THIS_MODULE)) {
 		dev_err(disk_to_dev(head->disk),
 			"Unable to create the %s device\n", name);
-	} else {
-		set_bit(NVME_NSHEAD_CDEV_LIVE, &head->flags);
+		return;
 	}
-	return ret;
+	set_bit(NVME_NSHEAD_CDEV_LIVE, &head->flags);
 }
 
 static void nvme_partition_scan_work(struct work_struct *work)
-- 
2.43.5