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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>
This commit is contained in:
Dan Williams 2016-05-18 09:13:13 -07:00
parent 45a0dac045
commit 6cf9c5babd
1 changed files with 5 additions and 4 deletions
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9
drivers/nvdimm/bus.c
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@ -124,9 +124,10 @@ static int nvdimm_bus_remove(struct device *dev)
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 @@ int __nd_driver_register(struct nd_device_driver *nd_drv, struct module *owner,
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;
}