libnvdimm: stop requiring a driver ->remove() method
The dax_pmem driver was implementing an empty ->remove() method to
satisfy the nvdimm bus driver that unconditionally calls ->remove().
Teach the core bus driver to check if ->remove() is NULL to remove that
requirement.
Reported-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c
index 97589e3..7cbc3d5 100644
--- a/drivers/nvdimm/bus.c
+++ b/drivers/nvdimm/bus.c
@@ -124,9 +124,10 @@
struct nd_device_driver *nd_drv = to_nd_device_driver(dev->driver);
struct module *provider = to_bus_provider(dev);
struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
- int rc;
+ int rc = 0;
- rc = nd_drv->remove(dev);
+ if (nd_drv->remove)
+ rc = nd_drv->remove(dev);
nd_region_disable(nvdimm_bus, dev);
dev_dbg(&nvdimm_bus->dev, "%s.remove(%s) = %d\n", dev->driver->name,
@@ -296,8 +297,8 @@
return -EINVAL;
}
- if (!nd_drv->probe || !nd_drv->remove) {
- pr_debug("->probe() and ->remove() must be specified\n");
+ if (!nd_drv->probe) {
+ pr_debug("%s ->probe() must be specified\n", mod_name);
return -EINVAL;
}