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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /tools/testing/selftests/alsa/pcm-test.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/alsa/pcm-test.c')
-rw-r--r--tools/testing/selftests/alsa/pcm-test.c631
1 files changed, 631 insertions, 0 deletions
diff --git a/tools/testing/selftests/alsa/pcm-test.c b/tools/testing/selftests/alsa/pcm-test.c
new file mode 100644
index 0000000000..c0a39818c5
--- /dev/null
+++ b/tools/testing/selftests/alsa/pcm-test.c
@@ -0,0 +1,631 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// kselftest for the ALSA PCM API
+//
+// Original author: Jaroslav Kysela <perex@perex.cz>
+// Copyright (c) 2022 Red Hat Inc.
+
+// This test will iterate over all cards detected in the system, exercising
+// every PCM device it can find. This may conflict with other system
+// software if there is audio activity so is best run on a system with a
+// minimal active userspace.
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <errno.h>
+#include <assert.h>
+#include <pthread.h>
+
+#include "../kselftest.h"
+#include "alsa-local.h"
+
+typedef struct timespec timestamp_t;
+
+struct card_data {
+ int card;
+ pthread_t thread;
+ struct card_data *next;
+};
+
+struct card_data *card_list = NULL;
+
+struct pcm_data {
+ snd_pcm_t *handle;
+ int card;
+ int device;
+ int subdevice;
+ snd_pcm_stream_t stream;
+ snd_config_t *pcm_config;
+ struct pcm_data *next;
+};
+
+struct pcm_data *pcm_list = NULL;
+
+int num_missing = 0;
+struct pcm_data *pcm_missing = NULL;
+
+snd_config_t *default_pcm_config;
+
+/* Lock while reporting results since kselftest doesn't */
+pthread_mutex_t results_lock = PTHREAD_MUTEX_INITIALIZER;
+
+enum test_class {
+ TEST_CLASS_DEFAULT,
+ TEST_CLASS_SYSTEM,
+};
+
+void timestamp_now(timestamp_t *tstamp)
+{
+ if (clock_gettime(CLOCK_MONOTONIC_RAW, tstamp))
+ ksft_exit_fail_msg("clock_get_time\n");
+}
+
+long long timestamp_diff_ms(timestamp_t *tstamp)
+{
+ timestamp_t now, diff;
+ timestamp_now(&now);
+ if (tstamp->tv_nsec > now.tv_nsec) {
+ diff.tv_sec = now.tv_sec - tstamp->tv_sec - 1;
+ diff.tv_nsec = (now.tv_nsec + 1000000000L) - tstamp->tv_nsec;
+ } else {
+ diff.tv_sec = now.tv_sec - tstamp->tv_sec;
+ diff.tv_nsec = now.tv_nsec - tstamp->tv_nsec;
+ }
+ return (diff.tv_sec * 1000) + ((diff.tv_nsec + 500000L) / 1000000L);
+}
+
+static long device_from_id(snd_config_t *node)
+{
+ const char *id;
+ char *end;
+ long v;
+
+ if (snd_config_get_id(node, &id))
+ ksft_exit_fail_msg("snd_config_get_id\n");
+ errno = 0;
+ v = strtol(id, &end, 10);
+ if (errno || *end)
+ return -1;
+ return v;
+}
+
+static void missing_device(int card, int device, int subdevice, snd_pcm_stream_t stream)
+{
+ struct pcm_data *pcm_data;
+
+ for (pcm_data = pcm_list; pcm_data != NULL; pcm_data = pcm_data->next) {
+ if (pcm_data->card != card)
+ continue;
+ if (pcm_data->device != device)
+ continue;
+ if (pcm_data->subdevice != subdevice)
+ continue;
+ if (pcm_data->stream != stream)
+ continue;
+ return;
+ }
+ pcm_data = calloc(1, sizeof(*pcm_data));
+ if (!pcm_data)
+ ksft_exit_fail_msg("Out of memory\n");
+ pcm_data->card = card;
+ pcm_data->device = device;
+ pcm_data->subdevice = subdevice;
+ pcm_data->stream = stream;
+ pcm_data->next = pcm_missing;
+ pcm_missing = pcm_data;
+ num_missing++;
+}
+
+static void missing_devices(int card, snd_config_t *card_config)
+{
+ snd_config_t *pcm_config, *node1, *node2;
+ snd_config_iterator_t i1, i2, next1, next2;
+ int device, subdevice;
+
+ pcm_config = conf_get_subtree(card_config, "pcm", NULL);
+ if (!pcm_config)
+ return;
+ snd_config_for_each(i1, next1, pcm_config) {
+ node1 = snd_config_iterator_entry(i1);
+ device = device_from_id(node1);
+ if (device < 0)
+ continue;
+ if (snd_config_get_type(node1) != SND_CONFIG_TYPE_COMPOUND)
+ continue;
+ snd_config_for_each(i2, next2, node1) {
+ node2 = snd_config_iterator_entry(i2);
+ subdevice = device_from_id(node2);
+ if (subdevice < 0)
+ continue;
+ if (conf_get_subtree(node2, "PLAYBACK", NULL))
+ missing_device(card, device, subdevice, SND_PCM_STREAM_PLAYBACK);
+ if (conf_get_subtree(node2, "CAPTURE", NULL))
+ missing_device(card, device, subdevice, SND_PCM_STREAM_CAPTURE);
+ }
+ }
+}
+
+static void find_pcms(void)
+{
+ char name[32], key[64];
+ char *card_name, *card_longname;
+ int card, dev, subdev, count, direction, err;
+ snd_pcm_stream_t stream;
+ struct pcm_data *pcm_data;
+ snd_ctl_t *handle;
+ snd_pcm_info_t *pcm_info;
+ snd_config_t *config, *card_config, *pcm_config;
+ struct card_data *card_data;
+
+ snd_pcm_info_alloca(&pcm_info);
+
+ card = -1;
+ if (snd_card_next(&card) < 0 || card < 0)
+ return;
+
+ config = get_alsalib_config();
+
+ while (card >= 0) {
+ sprintf(name, "hw:%d", card);
+
+ err = snd_ctl_open_lconf(&handle, name, 0, config);
+ if (err < 0) {
+ ksft_print_msg("Failed to get hctl for card %d: %s\n",
+ card, snd_strerror(err));
+ goto next_card;
+ }
+
+ err = snd_card_get_name(card, &card_name);
+ if (err != 0)
+ card_name = "Unknown";
+ err = snd_card_get_longname(card, &card_longname);
+ if (err != 0)
+ card_longname = "Unknown";
+ ksft_print_msg("Card %d - %s (%s)\n", card,
+ card_name, card_longname);
+
+ card_config = conf_by_card(card);
+
+ card_data = calloc(1, sizeof(*card_data));
+ if (!card_data)
+ ksft_exit_fail_msg("Out of memory\n");
+ card_data->card = card;
+ card_data->next = card_list;
+ card_list = card_data;
+
+ dev = -1;
+ while (1) {
+ if (snd_ctl_pcm_next_device(handle, &dev) < 0)
+ ksft_exit_fail_msg("snd_ctl_pcm_next_device\n");
+ if (dev < 0)
+ break;
+
+ for (direction = 0; direction < 2; direction++) {
+ stream = direction ? SND_PCM_STREAM_CAPTURE : SND_PCM_STREAM_PLAYBACK;
+ sprintf(key, "pcm.%d.%s", dev, snd_pcm_stream_name(stream));
+ pcm_config = conf_get_subtree(card_config, key, NULL);
+ if (conf_get_bool(card_config, key, "skip", false)) {
+ ksft_print_msg("skipping pcm %d.%d.%s\n", card, dev, snd_pcm_stream_name(stream));
+ continue;
+ }
+ snd_pcm_info_set_device(pcm_info, dev);
+ snd_pcm_info_set_subdevice(pcm_info, 0);
+ snd_pcm_info_set_stream(pcm_info, stream);
+ err = snd_ctl_pcm_info(handle, pcm_info);
+ if (err == -ENOENT)
+ continue;
+ if (err < 0)
+ ksft_exit_fail_msg("snd_ctl_pcm_info: %d:%d:%d\n",
+ dev, 0, stream);
+ count = snd_pcm_info_get_subdevices_count(pcm_info);
+ for (subdev = 0; subdev < count; subdev++) {
+ sprintf(key, "pcm.%d.%d.%s", dev, subdev, snd_pcm_stream_name(stream));
+ if (conf_get_bool(card_config, key, "skip", false)) {
+ ksft_print_msg("skipping pcm %d.%d.%d.%s\n", card, dev,
+ subdev, snd_pcm_stream_name(stream));
+ continue;
+ }
+ pcm_data = calloc(1, sizeof(*pcm_data));
+ if (!pcm_data)
+ ksft_exit_fail_msg("Out of memory\n");
+ pcm_data->card = card;
+ pcm_data->device = dev;
+ pcm_data->subdevice = subdev;
+ pcm_data->stream = stream;
+ pcm_data->pcm_config = conf_get_subtree(card_config, key, NULL);
+ pcm_data->next = pcm_list;
+ pcm_list = pcm_data;
+ }
+ }
+ }
+
+ /* check for missing devices */
+ missing_devices(card, card_config);
+
+ next_card:
+ snd_ctl_close(handle);
+ if (snd_card_next(&card) < 0) {
+ ksft_print_msg("snd_card_next");
+ break;
+ }
+ }
+
+ snd_config_delete(config);
+}
+
+static void test_pcm_time(struct pcm_data *data, enum test_class class,
+ const char *test_name, snd_config_t *pcm_cfg)
+{
+ char name[64], msg[256];
+ const int duration_s = 2, margin_ms = 100;
+ const int duration_ms = duration_s * 1000;
+ const char *cs;
+ int i, err;
+ snd_pcm_t *handle = NULL;
+ snd_pcm_access_t access = SND_PCM_ACCESS_RW_INTERLEAVED;
+ snd_pcm_format_t format, old_format;
+ const char *alt_formats[8];
+ unsigned char *samples = NULL;
+ snd_pcm_sframes_t frames;
+ long long ms;
+ long rate, channels, period_size, buffer_size;
+ unsigned int rrate;
+ snd_pcm_uframes_t rperiod_size, rbuffer_size, start_threshold;
+ timestamp_t tstamp;
+ bool pass = false;
+ snd_pcm_hw_params_t *hw_params;
+ snd_pcm_sw_params_t *sw_params;
+ const char *test_class_name;
+ bool skip = true;
+ const char *desc;
+
+ switch (class) {
+ case TEST_CLASS_DEFAULT:
+ test_class_name = "default";
+ break;
+ case TEST_CLASS_SYSTEM:
+ test_class_name = "system";
+ break;
+ default:
+ ksft_exit_fail_msg("Unknown test class %d\n", class);
+ break;
+ }
+
+ desc = conf_get_string(pcm_cfg, "description", NULL, NULL);
+ if (desc)
+ ksft_print_msg("%s.%s.%d.%d.%d.%s - %s\n",
+ test_class_name, test_name,
+ data->card, data->device, data->subdevice,
+ snd_pcm_stream_name(data->stream),
+ desc);
+
+
+ snd_pcm_hw_params_alloca(&hw_params);
+ snd_pcm_sw_params_alloca(&sw_params);
+
+ cs = conf_get_string(pcm_cfg, "format", NULL, "S16_LE");
+ format = snd_pcm_format_value(cs);
+ if (format == SND_PCM_FORMAT_UNKNOWN)
+ ksft_exit_fail_msg("Wrong format '%s'\n", cs);
+ conf_get_string_array(pcm_cfg, "alt_formats", NULL,
+ alt_formats, ARRAY_SIZE(alt_formats), NULL);
+ rate = conf_get_long(pcm_cfg, "rate", NULL, 48000);
+ channels = conf_get_long(pcm_cfg, "channels", NULL, 2);
+ period_size = conf_get_long(pcm_cfg, "period_size", NULL, 4096);
+ buffer_size = conf_get_long(pcm_cfg, "buffer_size", NULL, 16384);
+
+ samples = malloc((rate * channels * snd_pcm_format_physical_width(format)) / 8);
+ if (!samples)
+ ksft_exit_fail_msg("Out of memory\n");
+ snd_pcm_format_set_silence(format, samples, rate * channels);
+
+ sprintf(name, "hw:%d,%d,%d", data->card, data->device, data->subdevice);
+ err = snd_pcm_open(&handle, name, data->stream, 0);
+ if (err < 0) {
+ snprintf(msg, sizeof(msg), "Failed to get pcm handle: %s", snd_strerror(err));
+ goto __close;
+ }
+
+ err = snd_pcm_hw_params_any(handle, hw_params);
+ if (err < 0) {
+ snprintf(msg, sizeof(msg), "snd_pcm_hw_params_any: %s", snd_strerror(err));
+ goto __close;
+ }
+ err = snd_pcm_hw_params_set_rate_resample(handle, hw_params, 0);
+ if (err < 0) {
+ snprintf(msg, sizeof(msg), "snd_pcm_hw_params_set_rate_resample: %s", snd_strerror(err));
+ goto __close;
+ }
+ err = snd_pcm_hw_params_set_access(handle, hw_params, access);
+ if (err < 0) {
+ snprintf(msg, sizeof(msg), "snd_pcm_hw_params_set_access %s: %s",
+ snd_pcm_access_name(access), snd_strerror(err));
+ goto __close;
+ }
+ i = -1;
+__format:
+ err = snd_pcm_hw_params_set_format(handle, hw_params, format);
+ if (err < 0) {
+ i++;
+ if (i < ARRAY_SIZE(alt_formats) && alt_formats[i]) {
+ old_format = format;
+ format = snd_pcm_format_value(alt_formats[i]);
+ if (format != SND_PCM_FORMAT_UNKNOWN) {
+ ksft_print_msg("%s.%d.%d.%d.%s.%s format %s -> %s\n",
+ test_name,
+ data->card, data->device, data->subdevice,
+ snd_pcm_stream_name(data->stream),
+ snd_pcm_access_name(access),
+ snd_pcm_format_name(old_format),
+ snd_pcm_format_name(format));
+ samples = realloc(samples, (rate * channels *
+ snd_pcm_format_physical_width(format)) / 8);
+ if (!samples)
+ ksft_exit_fail_msg("Out of memory\n");
+ snd_pcm_format_set_silence(format, samples, rate * channels);
+ goto __format;
+ }
+ }
+ snprintf(msg, sizeof(msg), "snd_pcm_hw_params_set_format %s: %s",
+ snd_pcm_format_name(format), snd_strerror(err));
+ goto __close;
+ }
+ err = snd_pcm_hw_params_set_channels(handle, hw_params, channels);
+ if (err < 0) {
+ snprintf(msg, sizeof(msg), "snd_pcm_hw_params_set_channels %ld: %s", channels, snd_strerror(err));
+ goto __close;
+ }
+ rrate = rate;
+ err = snd_pcm_hw_params_set_rate_near(handle, hw_params, &rrate, 0);
+ if (err < 0) {
+ snprintf(msg, sizeof(msg), "snd_pcm_hw_params_set_rate %ld: %s", rate, snd_strerror(err));
+ goto __close;
+ }
+ if (rrate != rate) {
+ snprintf(msg, sizeof(msg), "rate mismatch %ld != %d", rate, rrate);
+ goto __close;
+ }
+ rperiod_size = period_size;
+ err = snd_pcm_hw_params_set_period_size_near(handle, hw_params, &rperiod_size, 0);
+ if (err < 0) {
+ snprintf(msg, sizeof(msg), "snd_pcm_hw_params_set_period_size %ld: %s", period_size, snd_strerror(err));
+ goto __close;
+ }
+ rbuffer_size = buffer_size;
+ err = snd_pcm_hw_params_set_buffer_size_near(handle, hw_params, &rbuffer_size);
+ if (err < 0) {
+ snprintf(msg, sizeof(msg), "snd_pcm_hw_params_set_buffer_size %ld: %s", buffer_size, snd_strerror(err));
+ goto __close;
+ }
+ err = snd_pcm_hw_params(handle, hw_params);
+ if (err < 0) {
+ snprintf(msg, sizeof(msg), "snd_pcm_hw_params: %s", snd_strerror(err));
+ goto __close;
+ }
+
+ err = snd_pcm_sw_params_current(handle, sw_params);
+ if (err < 0) {
+ snprintf(msg, sizeof(msg), "snd_pcm_sw_params_current: %s", snd_strerror(err));
+ goto __close;
+ }
+ if (data->stream == SND_PCM_STREAM_PLAYBACK) {
+ start_threshold = (rbuffer_size / rperiod_size) * rperiod_size;
+ } else {
+ start_threshold = rperiod_size;
+ }
+ err = snd_pcm_sw_params_set_start_threshold(handle, sw_params, start_threshold);
+ if (err < 0) {
+ snprintf(msg, sizeof(msg), "snd_pcm_sw_params_set_start_threshold %ld: %s", (long)start_threshold, snd_strerror(err));
+ goto __close;
+ }
+ err = snd_pcm_sw_params_set_avail_min(handle, sw_params, rperiod_size);
+ if (err < 0) {
+ snprintf(msg, sizeof(msg), "snd_pcm_sw_params_set_avail_min %ld: %s", (long)rperiod_size, snd_strerror(err));
+ goto __close;
+ }
+ err = snd_pcm_sw_params(handle, sw_params);
+ if (err < 0) {
+ snprintf(msg, sizeof(msg), "snd_pcm_sw_params: %s", snd_strerror(err));
+ goto __close;
+ }
+
+ ksft_print_msg("%s.%s.%d.%d.%d.%s hw_params.%s.%s.%ld.%ld.%ld.%ld sw_params.%ld\n",
+ test_class_name, test_name,
+ data->card, data->device, data->subdevice,
+ snd_pcm_stream_name(data->stream),
+ snd_pcm_access_name(access),
+ snd_pcm_format_name(format),
+ (long)rate, (long)channels,
+ (long)rperiod_size, (long)rbuffer_size,
+ (long)start_threshold);
+
+ /* Set all the params, actually run the test */
+ skip = false;
+
+ timestamp_now(&tstamp);
+ for (i = 0; i < duration_s; i++) {
+ if (data->stream == SND_PCM_STREAM_PLAYBACK) {
+ frames = snd_pcm_writei(handle, samples, rate);
+ if (frames < 0) {
+ snprintf(msg, sizeof(msg),
+ "Write failed: expected %ld, wrote %li", rate, frames);
+ goto __close;
+ }
+ if (frames < rate) {
+ snprintf(msg, sizeof(msg),
+ "expected %ld, wrote %li", rate, frames);
+ goto __close;
+ }
+ } else {
+ frames = snd_pcm_readi(handle, samples, rate);
+ if (frames < 0) {
+ snprintf(msg, sizeof(msg),
+ "expected %ld, wrote %li", rate, frames);
+ goto __close;
+ }
+ if (frames < rate) {
+ snprintf(msg, sizeof(msg),
+ "expected %ld, wrote %li", rate, frames);
+ goto __close;
+ }
+ }
+ }
+
+ snd_pcm_drain(handle);
+ ms = timestamp_diff_ms(&tstamp);
+ if (ms < duration_ms - margin_ms || ms > duration_ms + margin_ms) {
+ snprintf(msg, sizeof(msg), "time mismatch: expected %dms got %lld", duration_ms, ms);
+ goto __close;
+ }
+
+ msg[0] = '\0';
+ pass = true;
+__close:
+ pthread_mutex_lock(&results_lock);
+
+ switch (class) {
+ case TEST_CLASS_SYSTEM:
+ test_class_name = "system";
+ /*
+ * Anything specified as specific to this system
+ * should always be supported.
+ */
+ ksft_test_result(!skip, "%s.%s.%d.%d.%d.%s.params\n",
+ test_class_name, test_name,
+ data->card, data->device, data->subdevice,
+ snd_pcm_stream_name(data->stream));
+ break;
+ default:
+ break;
+ }
+
+ if (!skip)
+ ksft_test_result(pass, "%s.%s.%d.%d.%d.%s\n",
+ test_class_name, test_name,
+ data->card, data->device, data->subdevice,
+ snd_pcm_stream_name(data->stream));
+ else
+ ksft_test_result_skip("%s.%s.%d.%d.%d.%s\n",
+ test_class_name, test_name,
+ data->card, data->device, data->subdevice,
+ snd_pcm_stream_name(data->stream));
+
+ if (msg[0])
+ ksft_print_msg("%s\n", msg);
+
+ pthread_mutex_unlock(&results_lock);
+
+ free(samples);
+ if (handle)
+ snd_pcm_close(handle);
+}
+
+void run_time_tests(struct pcm_data *pcm, enum test_class class,
+ snd_config_t *cfg)
+{
+ const char *test_name, *test_type;
+ snd_config_t *pcm_cfg;
+ snd_config_iterator_t i, next;
+
+ if (!cfg)
+ return;
+
+ cfg = conf_get_subtree(cfg, "test", NULL);
+ if (cfg == NULL)
+ return;
+
+ snd_config_for_each(i, next, cfg) {
+ pcm_cfg = snd_config_iterator_entry(i);
+ if (snd_config_get_id(pcm_cfg, &test_name) < 0)
+ ksft_exit_fail_msg("snd_config_get_id\n");
+ test_type = conf_get_string(pcm_cfg, "type", NULL, "time");
+ if (strcmp(test_type, "time") == 0)
+ test_pcm_time(pcm, class, test_name, pcm_cfg);
+ else
+ ksft_exit_fail_msg("unknown test type '%s'\n", test_type);
+ }
+}
+
+void *card_thread(void *data)
+{
+ struct card_data *card = data;
+ struct pcm_data *pcm;
+
+ for (pcm = pcm_list; pcm != NULL; pcm = pcm->next) {
+ if (pcm->card != card->card)
+ continue;
+
+ run_time_tests(pcm, TEST_CLASS_DEFAULT, default_pcm_config);
+ run_time_tests(pcm, TEST_CLASS_SYSTEM, pcm->pcm_config);
+ }
+
+ return 0;
+}
+
+int main(void)
+{
+ struct card_data *card;
+ struct pcm_data *pcm;
+ snd_config_t *global_config, *cfg;
+ int num_pcm_tests = 0, num_tests, num_std_pcm_tests;
+ int ret;
+ void *thread_ret;
+
+ ksft_print_header();
+
+ global_config = conf_load_from_file("pcm-test.conf");
+ default_pcm_config = conf_get_subtree(global_config, "pcm", NULL);
+ if (default_pcm_config == NULL)
+ ksft_exit_fail_msg("default pcm test configuration (pcm compound) is missing\n");
+
+ conf_load();
+
+ find_pcms();
+
+ num_std_pcm_tests = conf_get_count(default_pcm_config, "test", NULL);
+
+ for (pcm = pcm_list; pcm != NULL; pcm = pcm->next) {
+ num_pcm_tests += num_std_pcm_tests;
+ cfg = pcm->pcm_config;
+ if (cfg == NULL)
+ continue;
+ /* Setting params is reported as a separate test */
+ num_tests = conf_get_count(cfg, "test", NULL) * 2;
+ if (num_tests > 0)
+ num_pcm_tests += num_tests;
+ }
+
+ ksft_set_plan(num_missing + num_pcm_tests);
+
+ for (pcm = pcm_missing; pcm != NULL; pcm = pcm->next) {
+ ksft_test_result(false, "test.missing.%d.%d.%d.%s\n",
+ pcm->card, pcm->device, pcm->subdevice,
+ snd_pcm_stream_name(pcm->stream));
+ }
+
+ for (card = card_list; card != NULL; card = card->next) {
+ ret = pthread_create(&card->thread, NULL, card_thread, card);
+ if (ret != 0) {
+ ksft_exit_fail_msg("Failed to create card %d thread: %d (%s)\n",
+ card->card, ret,
+ strerror(errno));
+ }
+ }
+
+ for (card = card_list; card != NULL; card = card->next) {
+ ret = pthread_join(card->thread, &thread_ret);
+ if (ret != 0) {
+ ksft_exit_fail_msg("Failed to join card %d thread: %d (%s)\n",
+ card->card, ret,
+ strerror(errno));
+ }
+ }
+
+ snd_config_delete(global_config);
+ conf_free();
+
+ ksft_exit_pass();
+
+ return 0;
+}