diff --git a/src/rocm_smi.cc b/src/rocm_smi.cc
index 44d8d907eb..8c3b710ee7 100755
--- a/src/rocm_smi.cc
+++ b/src/rocm_smi.cc
@@ -1811,6 +1811,8 @@ static rsmi_status_t get_dev_name_from_id(uint32_t dv_ind, char *name,
   uint16_t subsys_vend_id;
   uint16_t subsys_id;
   bool found_device_vendor = false;
+  // to match subsystem, it must match the device id at previous line
+  bool found_device_id_for_subsys = false;
   std::string val_str;
 
   assert(name != nullptr);
@@ -1857,8 +1859,8 @@ static rsmi_status_t get_dev_name_from_id(uint32_t dv_ind, char *name,
       if (ln[0] == '\t') {
         if (found_device_vendor) {
           if (ln[1] == '\t') {
-            // This is a subsystem line
-            if (typ == NAME_STR_SUBSYS) {
+            // The subsystem line, ignore a line if the device id not match
+            if (typ == NAME_STR_SUBSYS && found_device_id_for_subsys) {
               val_str = get_id_name_str_from_line(subsys_vend_id, ln, &ln_str);
 
               if (val_str.size() > 0) {
@@ -1880,6 +1882,12 @@ static rsmi_status_t get_dev_name_from_id(uint32_t dv_ind, char *name,
             if (val_str.size() > 0) {
               break;
             }
+          } else if (typ == NAME_STR_SUBSYS) {
+            // match the device id line
+            val_str = get_id_name_str_from_line(device_id, ln, &ln_str);
+            if (val_str.size() > 0) {
+              found_device_id_for_subsys = true;
+            }
           }
         }
       } else {  // ln[0] != '\t'; Vendor line
diff --git a/src/rocm_smi_main.cc b/src/rocm_smi_main.cc
index 16cd336e2a..52c8227c53 100755
--- a/src/rocm_smi_main.cc
+++ b/src/rocm_smi_main.cc
@@ -259,16 +259,17 @@ static bool bdfid_from_path(const std::string in_name, uint64_t *bdfid) {
 // 1 = not a good bdfid found
 static uint32_t ConstructBDFID(std::string path, uint64_t *bdfid) {
   assert(bdfid != nullptr);
-  char tpath[256] = {'\0'};
+  const unsigned int MAX_BDF_LENGTH = 512;
+  char tpath[MAX_BDF_LENGTH] = {'\0'};
   ssize_t ret;
-  memset(tpath,0,256);
+  memset(tpath,0,MAX_BDF_LENGTH);
 
-  ret = readlink(path.c_str(), tpath, 256);
+  ret = readlink(path.c_str(), tpath, MAX_BDF_LENGTH);
 
   assert(ret > 0);
-  assert(ret < 256);
+  assert(ret < MAX_BDF_LENGTH);
 
-  if (ret <= 0 || ret >= 256) {
+  if (ret <= 0 || ret >= MAX_BDF_LENGTH) {
     return 1;
   }