Commit 476f848a authored by Dan Williams's avatar Dan Williams
Browse files

libnvdimm, pmem: flush posted-write queues on shutdown 



Commit writes to media on system shutdown or pmem driver unload.

Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 7e267a8c

drivers/nvdimm/bus.c

+16 −0
Original line number Diff line number Diff line
@@ -136,6 +136,21 @@ static int nvdimm_bus_remove(struct device *dev) 
	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 @@ static struct bus_type nvdimm_bus_type = { 
	.match = nvdimm_bus_match,

	.probe = nvdimm_bus_probe,

	.remove = nvdimm_bus_remove,

	.shutdown = nvdimm_bus_shutdown,

};



static ASYNC_DOMAIN_EXCLUSIVE(nd_async_domain);

drivers/nvdimm/pmem.c

+8 −0
Original line number Diff line number Diff line
@@ -349,9 +349,16 @@ static int nd_pmem_remove(struct device *dev) 
{

	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 @@ static struct nd_device_driver nd_pmem_driver = { 
	.probe = nd_pmem_probe,

	.remove = nd_pmem_remove,

	.notify = nd_pmem_notify,

	.shutdown = nd_pmem_shutdown,

	.drv = {

		.name = "nd_pmem",

	},

include/linux/nd.h

+1 −0
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ struct nd_device_driver { 
	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);

};