nvme: fix drvdata setup for the nvme device

Pass the right private data to device_create_with_groups from the
beginning, and remove the superflous call to dev_set_drvdata.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Reviewed-by: NJon Derrick <jonathan.derrick@intel.com>
Signed-off-by: NJens Axboe <axboe@fb.com>

drivers/nvme/host/core.c

@@ -1383,14 +1383,13 @@ int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev,
 
 	ctrl->device = device_create_with_groups(nvme_class, ctrl->dev,
 				MKDEV(nvme_char_major, ctrl->instance),
-				dev, nvme_dev_attr_groups,
+				ctrl, nvme_dev_attr_groups,
 				"nvme%d", ctrl->instance);
 	if (IS_ERR(ctrl->device)) {
 		ret = PTR_ERR(ctrl->device);
 		goto out_release_instance;
 	}
 	get_device(ctrl->device);
-	dev_set_drvdata(ctrl->device, ctrl);
 
 	spin_lock(&dev_list_lock);
 	list_add_tail(&ctrl->node, &nvme_ctrl_list);