libnvdimm, pmem: flush posted-write queues on shutdown
Commit writes to media on system shutdown or pmem driver unload.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c
index e4882e6..1cc7880 100644
--- a/drivers/nvdimm/bus.c
+++ b/drivers/nvdimm/bus.c
@@ -136,6 +136,21 @@
return rc;
}
+static void nvdimm_bus_shutdown(struct device *dev)
+{
+ struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
+ struct nd_device_driver *nd_drv = NULL;
+
+ if (dev->driver)
+ nd_drv = to_nd_device_driver(dev->driver);
+
+ if (nd_drv && nd_drv->shutdown) {
+ nd_drv->shutdown(dev);
+ dev_dbg(&nvdimm_bus->dev, "%s.shutdown(%s)\n",
+ dev->driver->name, dev_name(dev));
+ }
+}
+
void nd_device_notify(struct device *dev, enum nvdimm_event event)
{
device_lock(dev);
@@ -214,6 +229,7 @@
.match = nvdimm_bus_match,
.probe = nvdimm_bus_probe,
.remove = nvdimm_bus_remove,
+ .shutdown = nvdimm_bus_shutdown,
};
static ASYNC_DOMAIN_EXCLUSIVE(nd_async_domain);
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index 9d9c1be..8bfc6ac 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -349,9 +349,16 @@
{
if (is_nd_btt(dev))
nvdimm_namespace_detach_btt(to_nd_btt(dev));
+ nvdimm_flush(to_nd_region(dev->parent));
+
return 0;
}
+static void nd_pmem_shutdown(struct device *dev)
+{
+ nvdimm_flush(to_nd_region(dev->parent));
+}
+
static void nd_pmem_notify(struct device *dev, enum nvdimm_event event)
{
struct pmem_device *pmem = dev_get_drvdata(dev);
@@ -391,6 +398,7 @@
.probe = nd_pmem_probe,
.remove = nd_pmem_remove,
.notify = nd_pmem_notify,
+ .shutdown = nd_pmem_shutdown,
.drv = {
.name = "nd_pmem",
},
diff --git a/include/linux/nd.h b/include/linux/nd.h
index aee2761..1ecd646 100644
--- a/include/linux/nd.h
+++ b/include/linux/nd.h
@@ -26,6 +26,7 @@
unsigned long type;
int (*probe)(struct device *dev);
int (*remove)(struct device *dev);
+ void (*shutdown)(struct device *dev);
void (*notify)(struct device *dev, enum nvdimm_event event);
};