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libnvdimm, pmem: flush posted-write queues on shutdown

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

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2016-07-09 00:12:52 -07:00
parent 7e267a8c79
commit 476f848aae
3 changed files with 25 additions and 0 deletions
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16
drivers/nvdimm/bus.c
View file

@ -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);

8
drivers/nvdimm/pmem.c
View file

@ -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",
},

1
include/linux/nd.h
View file

@ -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);
};