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authorDan Williams <dan.j.williams@intel.com>2018-12-27 19:54:10 -0800
committerDan Williams <dan.j.williams@intel.com>2018-12-27 19:54:10 -0800
commit4b5f747e82b12b6d8ab815fc259827a615c7f2c3 (patch)
treeec5eb3857bbb776ac521f555978fcb78cc6bd2a8 /drivers/acpi
parent37379cfc661e51607733f266d9f407b4f8aee16b (diff)
parent3d9cbe37c16ffd19eeab6b49a0311bbb999627d8 (diff)
Merge miscellaneous libnvdimm updates for 4.21
* Use common helpers, bitmap_zalloc() and kstrndup(), to replace open coded versions. * Clarify the comments around hotplug vs initial init case for the nfit driver. * Cleanup the libnvdimm init path.
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/nfit/core.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index c246e71c5345..011d3db19c80 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -1331,7 +1331,7 @@ static ssize_t scrub_store(struct device *dev,
if (nd_desc) {
struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
- rc = acpi_nfit_ars_rescan(acpi_desc, 0);
+ rc = acpi_nfit_ars_rescan(acpi_desc, ARS_REQ_LONG);
}
device_unlock(dev);
if (rc)
@@ -3535,7 +3535,13 @@ static int acpi_nfit_add(struct acpi_device *adev)
status = acpi_get_table(ACPI_SIG_NFIT, 0, &tbl);
if (ACPI_FAILURE(status)) {
- /* This is ok, we could have an nvdimm hotplugged later */
+ /* The NVDIMM root device allows OS to trigger enumeration of
+ * NVDIMMs through NFIT at boot time and re-enumeration at
+ * root level via the _FIT method during runtime.
+ * This is ok to return 0 here, we could have an nvdimm
+ * hotplugged later and evaluate _FIT method which returns
+ * data in the format of a series of NFIT Structures.
+ */
dev_dbg(dev, "failed to find NFIT at startup\n");
return 0;
}