nfit, libnvdimm: clear poison command support
Add the boiler-plate for a 'clear error' command based on section
9.20.7.6 "Function Index 4 - Clear Uncorrectable Error" from the ACPI
6.1 specification, and add a reference implementation in nfit_test.
Reviewed-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/acpi/nfit.c b/drivers/acpi/nfit.c
index 0def4eb..c067d74 100644
--- a/drivers/acpi/nfit.c
+++ b/drivers/acpi/nfit.c
@@ -87,6 +87,7 @@
static int xlat_status(void *buf, unsigned int cmd)
{
+ struct nd_cmd_clear_error *clear_err;
struct nd_cmd_ars_status *ars_status;
struct nd_cmd_ars_start *ars_start;
struct nd_cmd_ars_cap *ars_cap;
@@ -149,6 +150,15 @@
if (ars_status->status >> 16)
return -EIO;
break;
+ case ND_CMD_CLEAR_ERROR:
+ clear_err = buf;
+ if (clear_err->status & 0xffff)
+ return -EIO;
+ if (!clear_err->cleared)
+ return -EIO;
+ if (clear_err->length > clear_err->cleared)
+ return clear_err->cleared;
+ break;
default:
break;
}
@@ -1002,7 +1012,7 @@
if (!adev)
return;
- for (i = ND_CMD_ARS_CAP; i <= ND_CMD_ARS_STATUS; i++)
+ for (i = ND_CMD_ARS_CAP; i <= ND_CMD_CLEAR_ERROR; i++)
if (acpi_check_dsm(adev->handle, uuid, 1, 1ULL << i))
set_bit(i, &nd_desc->dsm_mask);
}