diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2017-05-04 21:47:22 +0300 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2017-05-05 01:41:39 +0300 |
| commit | 9d62ed96511823fa9c2ac7a819d7b4be22a9a6de (patch) | |
| tree | 960201b66f5fb6733dda4ab6b274fe6fafcf0e29 /drivers/nvdimm/namespace_devs.c | |
| parent | 8f078b38dd382710884ce7abd31a1935c440e6f8 (diff) | |
| download | linux-9d62ed96511823fa9c2ac7a819d7b4be22a9a6de.tar.xz | |
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/nvdimm/namespace_devs.c')
| -rw-r--r-- | drivers/nvdimm/namespace_devs.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c index 2f2d8afc684a..2f9dfbd2dbec 100644 --- a/drivers/nvdimm/namespace_devs.c +++ b/drivers/nvdimm/namespace_devs.c @@ -2236,14 +2236,21 @@ static int init_active_labels(struct nd_region *nd_region) int count, j; /* - * If the dimm is disabled then prevent the region from - * being activated if it aliases DPA. + * If the dimm is disabled then we may need to prevent + * the region from being activated. */ if (!ndd) { - if (!test_bit(NDD_ALIASING, &nvdimm->flags)) + if (test_bit(NDD_LOCKED, &nvdimm->flags)) + /* fail, label data may be unreadable */; + else if (test_bit(NDD_ALIASING, &nvdimm->flags)) + /* fail, labels needed to disambiguate dpa */; + else return 0; - dev_dbg(&nd_region->dev, "%s: is disabled, failing probe\n", - dev_name(&nd_mapping->nvdimm->dev)); + + dev_err(&nd_region->dev, "%s: is %s, failing probe\n", + dev_name(&nd_mapping->nvdimm->dev), + test_bit(NDD_LOCKED, &nvdimm->flags) + ? "locked" : "disabled"); return -ENXIO; } nd_mapping->ndd = ndd; |