nfit: Don't check _STA on NVDIMM devices

The _STA only applies to the root device, not the individual NVDIMMS,
so don't check here. NVDIMM device state flags are checked elsewhere.
Signed-off-by: NLinda Knippers <linda.knippers@hp.com>
Signed-off-by: NDan Williams <dan.j.williams@intel.com>

drivers/acpi/nfit.c

@@ -764,9 +764,7 @@ static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc,
 	struct acpi_device *adev, *adev_dimm;
 	struct device *dev = acpi_desc->dev;
 	const u8 *uuid = to_nfit_uuid(NFIT_DEV_DIMM);
-	unsigned long long sta;
-	int i, rc = -ENODEV;
-	acpi_status status;
+	int i;
 
 	nfit_mem->dsm_mask = acpi_desc->dimm_dsm_force_en;
 	adev = to_acpi_dev(acpi_desc);
@@ -781,25 +779,11 @@ static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc,
 		return force_enable_dimms ? 0 : -ENODEV;
 	}
 
-	status = acpi_evaluate_integer(adev_dimm->handle, "_STA", NULL, &sta);
-	if (status == AE_NOT_FOUND) {
-		dev_dbg(dev, "%s missing _STA, assuming enabled...\n",
-				dev_name(&adev_dimm->dev));
-		rc = 0;
-	} else if (ACPI_FAILURE(status))
-		dev_err(dev, "%s failed to retrieve_STA, disabling...\n",
-				dev_name(&adev_dimm->dev));
-	else if ((sta & ACPI_STA_DEVICE_ENABLED) == 0)
-		dev_info(dev, "%s disabled by firmware\n",
-				dev_name(&adev_dimm->dev));
-	else
-		rc = 0;
-
 	for (i = ND_CMD_SMART; i <= ND_CMD_VENDOR; i++)
 		if (acpi_check_dsm(adev_dimm->handle, uuid, 1, 1ULL << i))
 			set_bit(i, &nfit_mem->dsm_mask);
 
-	return force_enable_dimms ? 0 : rc;
+	return 0;
 }
 
 static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc)