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Subject[PATCH v3 3/3] nfit, address-range-scrub: add module option to skip initial ars
After attempting to quickly retrieve known errors the kernel proceeds to
kick off a long running ARS. Add a module option to disable this
behavior at initialization time, or at new region discovery time.
Otherwise, ARS can be started manually regardless of the state of this

Co-developed-by: Dave Jiang <>
Signed-off-by: Dave Jiang <>
Signed-off-by: Dan Williams <>
drivers/acpi/nfit/core.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index 2532294bbd68..7f3c70fde9a8 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -49,6 +49,10 @@ module_param(default_dsm_family, int, S_IRUGO);
"Try this DSM type first when identifying NVDIMM family");

+static bool no_init_ars;
+module_param(no_init_ars, bool, 0644);
+MODULE_PARM_DESC(no_init_ars, "Skip ARS run at nfit init time");

@@ -2816,6 +2820,9 @@ static int ars_register(struct acpi_nfit_desc *acpi_desc, struct nfit_spa *nfit_
int rc = *query_rc;

+ if (no_init_ars)
+ return acpi_nfit_register_region(acpi_desc, nfit_spa);
set_bit(ARS_REQ, &nfit_spa->ars_state);
set_bit(ARS_SHORT, &nfit_spa->ars_state);

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