tools/testing/nvdimm: fix return code for unimplemented commands

The implementation for the new "DIMM Flags" DSM relies on the -ENOTTY
return code to indicate that the flags are unimplimented and to fall
back to a safe default.  As is the -ENXIO error code erroneoously
indicates to fail enabling a BLK region.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/tools/testing/nvdimm/test/nfit.c b/tools/testing/nvdimm/test/nfit.c
index 4b69b8368de0..092d4724fe16 100644
--- a/tools/testing/nvdimm/test/nfit.c
+++ b/tools/testing/nvdimm/test/nfit.c
@@ -155,7 +155,7 @@ static int nfit_test_ctl(struct nvdimm_bus_descriptor *nd_desc,
         int i, rc;
 
         if (!nfit_mem || !test_bit(cmd, &nfit_mem->dsm_mask))
-                return -ENXIO;
+                return -ENOTTY;
 
         /* lookup label space for the given dimm */
         for (i = 0; i < ARRAY_SIZE(handle); i++)