netdev - [PATCH HID for-next v1 4/9] selftests: hid: ensure the program is correctly pinned

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Date:   Fri,  6 Jan 2023 11:23:27 +0100
From:   Benjamin Tissoires <benjamin.tissoires@...hat.com>
To:     Greg KH <gregkh@...uxfoundation.org>,
        Jiri Kosina <jikos@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     Tero Kristo <tero.kristo@...ux.intel.com>,
        linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        linux-kselftest@...r.kernel.org,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>
Subject: [PATCH HID for-next v1 4/9] selftests: hid: ensure the program is correctly pinned

Turns out that if bpffs was not mounted, the test was silently passing.

So ensure it passes by checking the mount command result.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>
---
 tools/testing/selftests/hid/hid_bpf.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/hid/hid_bpf.c b/tools/testing/selftests/hid/hid_bpf.c
index d215bb492eb4..3b204a15e44b 100644
--- a/tools/testing/selftests/hid/hid_bpf.c
+++ b/tools/testing/selftests/hid/hid_bpf.c
@@ -640,7 +640,8 @@ TEST_F(hid_bpf, test_attach_detach)
 
 	/* pin the first program and immediately unpin it */
 #define PIN_PATH "/sys/fs/bpf/hid_first_event"
-	bpf_program__pin(self->skel->progs.hid_first_event, PIN_PATH);
+	err = bpf_program__pin(self->skel->progs.hid_first_event, PIN_PATH);
+	ASSERT_OK(err) TH_LOG("error while calling bpf_program__pin");
 	remove(PIN_PATH);
 #undef PIN_PATH
 	usleep(100000);
-- 
2.38.1