diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/dax/bus.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/dax/bus.c b/drivers/dax/bus.c index 3003558c1a8b..2b29728ec2fd 100644 --- a/drivers/dax/bus.c +++ b/drivers/dax/bus.c @@ -1392,6 +1392,13 @@ int __dax_driver_register(struct dax_device_driver *dax_drv, struct device_driver *drv = &dax_drv->drv; int rc = 0; + /* + * dax_bus_probe() calls dax_drv->probe() unconditionally. + * So better be safe than sorry and ensure it is provided. + */ + if (!dax_drv->probe) + return -EINVAL; + INIT_LIST_HEAD(&dax_drv->ids); drv->owner = module; drv->name = mod_name; |