diff mbox

[4/4] acpi/nfit: allow knob to disable ARS being issued at kernel boot

Message ID 152236304498.35558.9795379174339167399.stgit@djiang5-desk3.ch.intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Dave Jiang March 29, 2018, 10:37 p.m. UTC 
Adding a kernel module parameter no_start_ars in order to bypass kernel
initiating scrubbing ARS.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
---
 drivers/acpi/nfit/core.c |   15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)
diff mbox

Patch

diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index 668d040bf108..21b73ff444f4 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -55,6 +55,10 @@  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_start_ars = 0;
+module_param(no_start_ars, int, S_IRUGO);
+MODULE_PARM_DESC(no_start_ars, "Disable kernel from initiate ARS at boot");
+
 LIST_HEAD(acpi_descs);
 DEFINE_MUTEX(acpi_desc_lock);
 
@@ -2959,10 +2963,13 @@  static void acpi_nfit_scrub(struct work_struct *work)
 
 	list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
 		if (nfit_spa->ars_state == NFIT_ARS_STATE_IDLE) {
-			dev_dbg(dev, "range %d set for ARS\n",
-				nfit_spa->spa->range_index);
-			nfit_spa->ars_state = NFIT_ARS_STATE_REQUESTED;
-			ars_needed++;
+			if (!no_start_ars) {
+				dev_dbg(dev, "range %d set for ARS\n",
+					nfit_spa->spa->range_index);
+				nfit_spa->ars_state =
+					NFIT_ARS_STATE_REQUESTED;
+				ars_needed++;
+			}
 		}
 	}