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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
setting.

Co-developed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
hifive-unleashed-5.1
Dan Williams 2018-04-02 15:28:03 -07:00
parent bc6ba80858
commit bca811a7fd
1 changed files with 7 additions and 0 deletions
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7
drivers/acpi/nfit/core.c
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@ -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 bool no_init_ars;
module_param(no_init_ars, bool, 0644);
MODULE_PARM_DESC(no_init_ars, "Skip ARS run at nfit init time");
LIST_HEAD(acpi_descs);
DEFINE_MUTEX(acpi_desc_lock);
@ -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);