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authorDan Williams <dan.j.williams@intel.com>2017-05-04 11:47:22 -0700
committerDan Williams <dan.j.williams@intel.com>2017-05-04 15:41:39 -0700
commit9d62ed96511823fa9c2ac7a819d7b4be22a9a6de (patch)
tree960201b66f5fb6733dda4ab6b274fe6fafcf0e29 /drivers/acpi/nfit
parent8f078b38dd382710884ce7abd31a1935c440e6f8 (diff)
downloadlinux-9d62ed96511823fa9c2ac7a819d7b4be22a9a6de.tar.bz2
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>
Diffstat (limited to 'drivers/acpi/nfit')
-rw-r--r--drivers/acpi/nfit/core.c21
1 files changed, 18 insertions, 3 deletions
diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index a26c2297c1ed..891bd49ada0b 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,