According to man pages, asprintf returns -1 when failure. This patch
fixes two incorrect return value checker.

Signed-off-by: Wang Nan <wangn...@huawei.com>
Fixes: ffeb883e5662 ("perf tools: Show proper error message for wrong terms of 
hw/sw events")
Cc: He Kuang <heku...@huawei.com>
Cc: Arnaldo Carvalho de Melo <a...@redhat.com>
Cc: Jiri Olsa <jo...@kernel.org>
Cc: Masami Hiramatsu <masami.hiramatsu...@hitachi.com>
Cc: Namhyung Kim <namhy...@kernel.org>
Cc: Zefan Li <lize...@huawei.com>
Cc: pi3or...@163.com
---
 tools/perf/util/parse-events.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index e5583fd..72524c7 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -2110,11 +2110,11 @@ char *parse_events_formats_error_string(char 
*additional_terms)
 
        /* valid terms */
        if (additional_terms) {
-               if (!asprintf(&str, "valid terms: %s,%s",
-                             additional_terms, static_terms))
+               if (asprintf(&str, "valid terms: %s,%s",
+                            additional_terms, static_terms) < 0)
                        goto fail;
        } else {
-               if (!asprintf(&str, "valid terms: %s", static_terms))
+               if (asprintf(&str, "valid terms: %s", static_terms) < 0)
                        goto fail;
        }
        return str;
-- 
1.8.3.4

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