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
setting.
Co-developed-by: Dave Jiang <dave.jiang@xxxxxxxxx>
Signed-off-by: Dave Jiang <dave.jiang@xxxxxxxxx>
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
---
drivers/acpi/nfit/core.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index 29a033f3455d..848e05b25d7d 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);
MODULE_PARM_DESC(default_dsm_family,
"Try this DSM type first when identifying NVDIMM family");
+static int no_init_ars;
+module_param(no_init_ars, int, 0644);
+MODULE_PARM_DESC(no_init_ars, "Skip ARS run at nfit init time");
+
LIST_HEAD(acpi_descs);
DEFINE_MUTEX(acpi_desc_lock);
@@ -2868,8 +2872,11 @@ static int init_ars(struct acpi_nfit_desc *acpi_desc, struct nfit_spa *nfit_spa,
WARN_ON_ONCE(!test_bit(ARS_SHORT, &nfit_spa->ars_state));
rc = ars_start(acpi_desc, nfit_spa);
- if (rc == 0)
+ if (rc == 0) {
rc = acpi_nfit_query_poison(acpi_desc, nfit_spa);
+ if (!no_init_ars)
+ set_bit(ARS_REQ, &nfit_spa->ars_state);
+ }
out:
if (acpi_nfit_register_region(acpi_desc, nfit_spa))
set_bit(ARS_FAILED, &nfit_spa->ars_state);
--
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