From fd14602d05229671be81018fa226f9afdafdba88 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Tue, 15 Jun 2021 16:18:22 -0700 Subject: libnvdimm: Export nvdimm shutdown helper, nvdimm_delete() CXL is a hotplug bus and arranges for nvdimm devices to be dynamically discovered and removed. The libnvdimm core manages shutdown of nvdimm security operations when the device is unregistered. That functionality is moved to nvdimm_delete() and invoked by the CXL-to-nvdimm glue code. Reviewed-by: Jonathan Cameron Link: https://lore.kernel.org/r/162379910271.2993820.2955889139842401250.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Dan Williams --- drivers/nvdimm/bus.c | 19 ++++--------------- drivers/nvdimm/dimm_devs.c | 18 ++++++++++++++++++ 2 files changed, 22 insertions(+), 15 deletions(-) (limited to 'drivers/nvdimm') diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c index 3a777d0073b7..a11821df83b5 100644 --- a/drivers/nvdimm/bus.c +++ b/drivers/nvdimm/bus.c @@ -396,21 +396,10 @@ static int child_unregister(struct device *dev, void *data) if (dev->class) return 0; - if (is_nvdimm(dev)) { - struct nvdimm *nvdimm = to_nvdimm(dev); - bool dev_put = false; - - /* We are shutting down. Make state frozen artificially. */ - nvdimm_bus_lock(dev); - set_bit(NVDIMM_SECURITY_FROZEN, &nvdimm->sec.flags); - if (test_and_clear_bit(NDD_WORK_PENDING, &nvdimm->flags)) - dev_put = true; - nvdimm_bus_unlock(dev); - cancel_delayed_work_sync(&nvdimm->dwork); - if (dev_put) - put_device(dev); - } - nd_device_unregister(dev, ND_SYNC); + if (is_nvdimm(dev)) + nvdimm_delete(to_nvdimm(dev)); + else + nd_device_unregister(dev, ND_SYNC); return 0; } diff --git a/drivers/nvdimm/dimm_devs.c b/drivers/nvdimm/dimm_devs.c index 9d208570d059..dc7449a40003 100644 --- a/drivers/nvdimm/dimm_devs.c +++ b/drivers/nvdimm/dimm_devs.c @@ -642,6 +642,24 @@ struct nvdimm *__nvdimm_create(struct nvdimm_bus *nvdimm_bus, } EXPORT_SYMBOL_GPL(__nvdimm_create); +void nvdimm_delete(struct nvdimm *nvdimm) +{ + struct device *dev = &nvdimm->dev; + bool dev_put = false; + + /* We are shutting down. Make state frozen artificially. */ + nvdimm_bus_lock(dev); + set_bit(NVDIMM_SECURITY_FROZEN, &nvdimm->sec.flags); + if (test_and_clear_bit(NDD_WORK_PENDING, &nvdimm->flags)) + dev_put = true; + nvdimm_bus_unlock(dev); + cancel_delayed_work_sync(&nvdimm->dwork); + if (dev_put) + put_device(dev); + nd_device_unregister(dev, ND_SYNC); +} +EXPORT_SYMBOL_GPL(nvdimm_delete); + static void shutdown_security_notify(void *data) { struct nvdimm *nvdimm = data; -- cgit From 2bbafda405c04cfed1b57b761d13ada3154c0f89 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Tue, 15 Jun 2021 16:18:28 -0700 Subject: libnvdimm: Drop unused device power management support LIBNVDIMM device objects register sysfs power attributes despite nothing requiring that support. Clean up sysfs remove the power/ attribute group. This requires a device_create() and a device_register() usage to be converted to the device_initialize() + device_add() pattern. Reviewed-by: Jonathan Cameron Link: https://lore.kernel.org/r/162379910795.2993820.10130417680551632288.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Dan Williams --- drivers/nvdimm/bus.c | 45 +++++++++++++++++++++++++++++++++++++-------- 1 file changed, 37 insertions(+), 8 deletions(-) (limited to 'drivers/nvdimm') diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c index a11821df83b5..e6aa87043a95 100644 --- a/drivers/nvdimm/bus.c +++ b/drivers/nvdimm/bus.c @@ -363,8 +363,13 @@ struct nvdimm_bus *nvdimm_bus_register(struct device *parent, nvdimm_bus->dev.groups = nd_desc->attr_groups; nvdimm_bus->dev.bus = &nvdimm_bus_type; nvdimm_bus->dev.of_node = nd_desc->of_node; - dev_set_name(&nvdimm_bus->dev, "ndbus%d", nvdimm_bus->id); - rc = device_register(&nvdimm_bus->dev); + device_initialize(&nvdimm_bus->dev); + device_set_pm_not_required(&nvdimm_bus->dev); + rc = dev_set_name(&nvdimm_bus->dev, "ndbus%d", nvdimm_bus->id); + if (rc) + goto err; + + rc = device_add(&nvdimm_bus->dev); if (rc) { dev_dbg(&nvdimm_bus->dev, "registration failed: %d\n", rc); goto err; @@ -525,6 +530,7 @@ void __nd_device_register(struct device *dev) set_dev_node(dev, to_nd_region(dev)->numa_node); dev->bus = &nvdimm_bus_type; + device_set_pm_not_required(dev); if (dev->parent) { get_device(dev->parent); if (dev_to_node(dev) == NUMA_NO_NODE) @@ -717,18 +723,41 @@ const struct attribute_group nd_numa_attribute_group = { .is_visible = nd_numa_attr_visible, }; +static void ndctl_release(struct device *dev) +{ + kfree(dev); +} + int nvdimm_bus_create_ndctl(struct nvdimm_bus *nvdimm_bus) { dev_t devt = MKDEV(nvdimm_bus_major, nvdimm_bus->id); struct device *dev; + int rc; - dev = device_create(nd_class, &nvdimm_bus->dev, devt, nvdimm_bus, - "ndctl%d", nvdimm_bus->id); + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + if (!dev) + return -ENOMEM; + device_initialize(dev); + device_set_pm_not_required(dev); + dev->class = nd_class; + dev->parent = &nvdimm_bus->dev; + dev->devt = devt; + dev->release = ndctl_release; + rc = dev_set_name(dev, "ndctl%d", nvdimm_bus->id); + if (rc) + goto err; - if (IS_ERR(dev)) - dev_dbg(&nvdimm_bus->dev, "failed to register ndctl%d: %ld\n", - nvdimm_bus->id, PTR_ERR(dev)); - return PTR_ERR_OR_ZERO(dev); + rc = device_add(dev); + if (rc) { + dev_dbg(&nvdimm_bus->dev, "failed to register ndctl%d: %d\n", + nvdimm_bus->id, rc); + goto err; + } + return 0; + +err: + put_device(dev); + return rc; } void nvdimm_bus_destroy_ndctl(struct nvdimm_bus *nvdimm_bus) -- cgit