libnvdimm: handle locked label storage areas
Per the latest version of the "NVDIMM DSM Interface Example" [1], the
label data retrieval routine can report a "locked" status. In this case
all regions associated with that DIMM are disabled until the label area
is unlocked. Provide generic libnvdimm enabling for NVDIMMs with label
data area locking capabilities.
[1]: http://pmem.io/documents/
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index a26c229..891bd49 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -184,14 +184,29 @@ static int xlat_bus_status(void *buf, unsigned int cmd, u32 status)
return 0;
}
+static int xlat_nvdimm_status(void *buf, unsigned int cmd, u32 status)
+{
+ switch (cmd) {
+ case ND_CMD_GET_CONFIG_SIZE:
+ if (status >> 16 & ND_CONFIG_LOCKED)
+ return -EACCES;
+ break;
+ default:
+ break;
+ }
+
+ /* all other non-zero status results in an error */
+ if (status)
+ return -EIO;
+ return 0;
+}
+
static int xlat_status(struct nvdimm *nvdimm, void *buf, unsigned int cmd,
u32 status)
{
if (!nvdimm)
return xlat_bus_status(buf, cmd, status);
- if (status)
- return -EIO;
- return 0;
+ return xlat_nvdimm_status(buf, cmd, status);
}
int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,