int nd_pfn_probe(struct nd_namespace_common *ndns, void *drvdata)
{
int rc;
struct device *dev;
struct nd_pfn *nd_pfn;
struct nd_pfn_sb *pfn_sb;
struct nd_region *nd_region = to_nd_region(ndns->dev.parent);
if (ndns->force_raw)
return -ENODEV;
nvdimm_bus_lock(&ndns->dev);
dev = __nd_pfn_create(nd_region, NULL, PFN_MODE_NONE, ndns);
nvdimm_bus_unlock(&ndns->dev);
if (!dev)
return -ENOMEM;
dev_set_drvdata(dev, drvdata);
pfn_sb = kzalloc(sizeof(*pfn_sb), GFP_KERNEL);
nd_pfn = to_nd_pfn(dev);
nd_pfn->pfn_sb = pfn_sb;
rc = nd_pfn_validate(nd_pfn);
nd_pfn->pfn_sb = NULL;
kfree(pfn_sb);
dev_dbg(&ndns->dev, "%s: pfn: %s\n", __func__,
rc == 0 ? dev_name(dev) : "<none>");
if (rc < 0) {
__nd_detach_ndns(dev, &nd_pfn->ndns);
put_device(dev);
} else
__nd_device_register(&nd_pfn->dev);
return rc;
}
void nd_detach_ndns(struct device *dev,
struct nd_namespace_common **_ndns)
{
struct nd_namespace_common *ndns = *_ndns;
if (!ndns)
return;
get_device(&ndns->dev);
device_lock(&ndns->dev);
__nd_detach_ndns(dev, _ndns);
device_unlock(&ndns->dev);
put_device(&ndns->dev);
}
