[PATCH] kselftest/alsa: Mark test plan as skipped when no cards are available

["Nícolas F. R. A. Prado" <nfraprado@collabora.com>]

When no soundcards are available, it won't be possible to run any tests.
Currently, when this happens, in both pcm-test and mixer-test, 0
tests are reported, and the pass exit code is returned. Instead, call
ksft_exit_skip() so that the whole test plan is marked as skipped in the
KTAP output and it exits with the skip exit code.

Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>

---

 tools/testing/selftests/alsa/mixer-test.c | 7 +++++--
 tools/testing/selftests/alsa/pcm-test.c   | 7 +++++--
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/tools/testing/selftests/alsa/mixer-test.c b/tools/testing/selftests/alsa/mixer-test.c
index c95d63e553f4..8f45c15a5667 100644
--- a/tools/testing/selftests/alsa/mixer-test.c
+++ b/tools/testing/selftests/alsa/mixer-test.c
@@ -66,8 +66,11 @@ static void find_controls(void)
 	char *card_name, *card_longname;
 
 	card = -1;
-	if (snd_card_next(&card) < 0 || card < 0)
-		return;
+	err = snd_card_next(&card);
+	if (err < 0)
+		ksft_exit_skip("Couldn't open first soundcard. rc=%d\n", err);
+	if (card < 0)
+		ksft_exit_skip("No soundcard available\n");
 
 	config = get_alsalib_config();
 
diff --git a/tools/testing/selftests/alsa/pcm-test.c b/tools/testing/selftests/alsa/pcm-test.c
index 2f5e3c462194..74d9cf8b5a69 100644
--- a/tools/testing/selftests/alsa/pcm-test.c
+++ b/tools/testing/selftests/alsa/pcm-test.c
@@ -161,8 +161,11 @@ static void find_pcms(void)
 	snd_pcm_info_alloca(&pcm_info);
 
 	card = -1;
-	if (snd_card_next(&card) < 0 || card < 0)
-		return;
+	err = snd_card_next(&card);
+	if (err < 0)
+		ksft_exit_skip("Couldn't open first soundcard. rc=%d\n", err);
+	if (card < 0)
+		ksft_exit_skip("No soundcard available\n");
 
 	config = get_alsalib_config();
 
-- 
2.42.0