* device outside of mmap of the resulting character device.
*/
dax_dev = alloc_dax(dev_dax, NULL, NULL, DAXDEV_F_SYNC);
- if (!dax_dev)
+ if (IS_ERR(dax_dev)) {
+ rc = PTR_ERR(dax_dev);
goto err;
+ }
/* a device_dax instance is dead while the driver is not attached */
kill_dax(dax_dev);