1 files changed, 4 insertions, 2 deletions

diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index f959c39cc007..e488d9a03adc 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -352,8 +352,10 @@ static int ddebug_parse_query(char *words[], int nwords,
                                 return -EINVAL;
                         if (last) {
                                 /* range <first>-<last> */
-                                if (parse_lineno(last, &query->last_lineno)
-                                    < query->first_lineno) {
+                                if (parse_lineno(last, &query->last_lineno) < 0)
+                                        return -EINVAL;
+
+                                if (query->last_lineno < query->first_lineno) {
                                         pr_err("last-line:%d < 1st-line:%d\n",
                                                 query->last_lineno,
                                                 query->first_lineno);