Single out the mapping for the requested dimm device when specified.

Signed-off-by: Dan Williams <dan.j.willi...@intel.com>
---
 ndctl/builtin-list.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/ndctl/builtin-list.c b/ndctl/builtin-list.c
index ed4edf6f0249..e8d007003b62 100644
--- a/ndctl/builtin-list.c
+++ b/ndctl/builtin-list.c
@@ -173,6 +173,9 @@ static struct json_object *region_to_json(struct 
ndctl_region *region)
                if (!list.dimms)
                        break;
 
+               if (!util_dimm_filter(dimm, param.dimm))
+                       continue;
+
                if (!list.idle && !ndctl_dimm_is_enabled(dimm))
                        continue;
 

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