RDMA/device: Use __ib_device_get_by_name() in ib_device_rename()

No reason to open code this loop.
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>
Reviewed-by: NSteve Wise <swise@opengridcomputing.com>

drivers/infiniband/core/device.c

@@ -183,18 +183,15 @@ static struct ib_device *__ib_device_get_by_name(const char *name)
 
 int ib_device_rename(struct ib_device *ibdev, const char *name)
 {
-	struct ib_device *device;
 	int ret = 0;
 
 	if (!strcmp(name, dev_name(&ibdev->dev)))
 		return ret;
 
 	mutex_lock(&device_mutex);
-	list_for_each_entry(device, &device_list, core_list) {
-		if (!strcmp(name, dev_name(&device->dev))) {
-			ret = -EEXIST;
-			goto out;
-		}
+	if (__ib_device_get_by_name(name)) {
+		ret = -EEXIST;
+		goto out;
 	}
 
 	ret = device_rename(&ibdev->dev, name);