[PATCH 2/2] selftest/hid: add test for negative return codes for hid_bpf_hw_request
From: Benjamin Tissoires <bentiss@kernel.org>
Date: 2026-09-15 15:47:21
Also in:
linux-kselftest, lkml
Subsystem:
hid core layer, kernel selftest framework, the rest · Maintainers:
Jiri Kosina, Benjamin Tissoires, Shuah Khan, Shuah Khan, Linus Torvalds
If the transport driver returns an error, we should ensure we actually get the error, not a success value. Signed-off-by: Benjamin Tissoires <bentiss@kernel.org> --- tools/testing/selftests/hid/hid_bpf.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+)
diff --git a/tools/testing/selftests/hid/hid_bpf.c b/tools/testing/selftests/hid/hid_bpf.c
index 32d81ba15a25..8c41ebfb85e4 100644
--- a/tools/testing/selftests/hid/hid_bpf.c
+++ b/tools/testing/selftests/hid/hid_bpf.c@@ -546,6 +546,37 @@ TEST_F(hid_bpf, test_hid_user_raw_request_call) ASSERT_EQ(args.data[1], 2); } +/* + * Call hid_hw_raw_request against the given uhid device, + * check that the program is called and does the expected. + */ +TEST_F(hid_bpf, test_hid_user_raw_request_call_eio) +{ + struct hid_hw_request_syscall_args args = { + .retval = -1, + .type = HID_FEATURE_REPORT, + .request_type = HID_REQ_GET_PROTOCOL, + .size = MAX_BUF_SIZE, + }; + DECLARE_LIBBPF_OPTS(bpf_test_run_opts, tattrs, + .ctx_in = &args, + .ctx_size_in = sizeof(args), + ); + int err, prog_fd; + + LOAD_BPF; + + args.hid = self->hid.hid_id; + args.data[0] = 1; /* report ID */ + + prog_fd = bpf_program__fd(self->skel->progs.hid_user_raw_request); + + err = bpf_prog_test_run_opts(prog_fd, &tattrs); + ASSERT_OK(err) TH_LOG("error while calling bpf_prog_test_run_opts"); + + ASSERT_EQ(args.retval, -EIO); +} + /* * Call hid_hw_raw_request against the given uhid device, * check that the program is called and prevents the
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2.55.0