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authorDan Williams <dan.j.williams@intel.com>2016-03-04 03:08:54 +0300
committerDan Williams <dan.j.williams@intel.com>2016-03-06 05:06:14 +0300
commitd4f323672aa63713b7ca26da418f66cc30d3a41a (patch)
treec073dd799eab97ed7b6e7e04a94c16e793361285 /drivers/acpi/nfit.c
parent07accfa9d1a8bac8262f6d24a94a54d2d1f35149 (diff)
downloadlinux-d4f323672aa63713b7ca26da418f66cc30d3a41a.tar.xz
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>
Diffstat (limited to 'drivers/acpi/nfit.c')
-rw-r--r--drivers/acpi/nfit.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/acpi/nfit.c b/drivers/acpi/nfit.c
index 0def4ebf5d43..c067d7414007 100644
--- a/drivers/acpi/nfit.c
+++ b/drivers/acpi/nfit.c
@@ -87,6 +87,7 @@ static struct acpi_device *to_acpi_dev(struct acpi_nfit_desc *acpi_desc)
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 @@ static int xlat_status(void *buf, unsigned int cmd)
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 @@ static void acpi_nfit_init_dsms(struct acpi_nfit_desc *acpi_desc)
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);
}