diff options
| -rw-r--r-- | drivers/nvdimm/region_devs.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c index fa37afcd43ff..174a418cb171 100644 --- a/drivers/nvdimm/region_devs.c +++ b/drivers/nvdimm/region_devs.c @@ -560,10 +560,17 @@ static ssize_t region_badblocks_show(struct device *dev, struct device_attribute *attr, char *buf) { struct nd_region *nd_region = to_nd_region(dev); + ssize_t rc; - return badblocks_show(&nd_region->bb, buf, 0); -} + device_lock(dev); + if (dev->driver) + rc = badblocks_show(&nd_region->bb, buf, 0); + else + rc = -ENXIO; + device_unlock(dev); + return rc; +} static DEVICE_ATTR(badblocks, 0444, region_badblocks_show, NULL); static ssize_t resource_show(struct device *dev, |