nfit, libnvdimm: allow an ARS scrub to be triggered on demand
Normally, an ARS (Address Range Scrub) only happens at
boot/initialization time. There can however arise situations where a
bus-wide rescan is needed - notably, in the case of discovering a latent
media error, we should do a full rescan to figure out what other sectors
are bad, and thus potentially avoid triggering an mce on them in the
future. Also provide a sysfs trigger to start a bus-wide scrub.
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/acpi/nfit.h b/drivers/acpi/nfit.h
index b63a583..6ecf337 100644
--- a/drivers/acpi/nfit.h
+++ b/drivers/acpi/nfit.h
@@ -80,7 +80,7 @@
struct nfit_spa {
struct list_head list;
struct nd_region *nd_region;
- unsigned int ars_done:1;
+ unsigned int ars_required:1;
u32 clear_err_unit;
u32 max_ars;
struct acpi_nfit_system_address spa[0];
@@ -148,6 +148,8 @@
struct nd_cmd_ars_status *ars_status;
size_t ars_status_size;
struct work_struct work;
+ struct kernfs_node *scrub_count_state;
+ unsigned int scrub_count;
unsigned int cancel:1;
unsigned long dimm_cmd_force_en;
unsigned long bus_cmd_force_en;