netdev - [PATCH] selftests/bpf: Fix return value check in attach

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Date:   Fri, 28 May 2021 17:07:58 +0800
From:   Yu Kuai <yukuai3@...wei.com>
To:     <shuah@...nel.org>, <ast@...nel.org>, <daniel@...earbox.net>,
        <andrii@...nel.org>
CC:     <linux-kselftest@...r.kernel.org>, <netdev@...r.kernel.org>,
        <bpf@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <yukuai3@...wei.com>, <yi.zhang@...wei.com>
Subject: [PATCH] selftests/bpf: Fix return value check in attach_bpf()

use libbpf_get_error() to check the return value of
bpf_program__attach().

Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Yu Kuai <yukuai3@...wei.com>
---
 tools/testing/selftests/bpf/benchs/bench_rename.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/benchs/bench_rename.c b/tools/testing/selftests/bpf/benchs/bench_rename.c
index c7ec114eca56..b7d4a1d74fca 100644
--- a/tools/testing/selftests/bpf/benchs/bench_rename.c
+++ b/tools/testing/selftests/bpf/benchs/bench_rename.c
@@ -65,7 +65,7 @@ static void attach_bpf(struct bpf_program *prog)
 	struct bpf_link *link;
 
 	link = bpf_program__attach(prog);
-	if (!link) {
+	if (libbpf_get_error(link)) {
 		fprintf(stderr, "failed to attach program!\n");
 		exit(1);
 	}
-- 
2.25.4