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Date: Mon, 16 May 2022 09:49:04 +0200
From: Takashi Iwai <tiwai@...e.de>
To: Siddh Raman Pant <siddhpant.gh@...il.com>
Cc: Mark Brown <broonie@...nel.org>, Jaroslav Kysela <perex@...ex.cz>,
Takashi Iwai <tiwai@...e.com>,
Shuah Khan <skhan@...uxfoundation.org>,
alsa-devel@...a-project.org, linux-kselftest@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH] selftests: alsa: Better error messages
On Fri, 13 May 2022 15:40:57 +0200,
Siddh Raman Pant wrote:
>
> This allows for potentially better machine-parsing due to an
> expected / fixed format. Also because of eyecandy reasons.
>
> Whenever possible, errors will start with the name of the
> offending card/control, separated by the error with colons.
>
> Whenever there is a description of an error given, the generated
> error string from snd_strerror will be (mostly) enclosed in
> parentheses at the end.
>
> Clarity of error messages have been (hopefully) improved.
>
> Signed-off-by: Siddh Raman Pant <siddhpant.gh@...il.com>
Thanks for the patch.
But, honestly speaking, I'm not sure whether it worth.
Although it's possibly a bit more consistent over all texts, I
don't see significant improvement by this change.
But I'm fine to apply it, so keep this pending and would like to
hear from others.
thanks,
Takashi
> ---
> tools/testing/selftests/alsa/mixer-test.c | 94 +++++++++++------------
> 1 file changed, 47 insertions(+), 47 deletions(-)
>
> diff --git a/tools/testing/selftests/alsa/mixer-test.c b/tools/testing/selftests/alsa/mixer-test.c
> index a38b89c28..4719b12a5 100644
> --- a/tools/testing/selftests/alsa/mixer-test.c
> +++ b/tools/testing/selftests/alsa/mixer-test.c
> @@ -114,7 +114,7 @@ static void find_controls(void)
>
> err = snd_config_load_string(&config, alsa_config, strlen(alsa_config));
> if (err < 0) {
> - ksft_print_msg("Unable to parse custom alsa-lib configuration: %s\n",
> + ksft_print_msg("Unable to parse custom alsa-lib configuration (%s)\n",
> snd_strerror(err));
> ksft_exit_fail();
> }
> @@ -128,7 +128,7 @@ static void find_controls(void)
>
> err = snd_ctl_open_lconf(&card_data->handle, name, 0, config);
> if (err < 0) {
> - ksft_print_msg("Failed to get hctl for card %d: %s\n",
> + ksft_print_msg("Card %d: Failed to get hctl (%s)\n",
> card, snd_strerror(err));
> goto next_card;
> }
> @@ -177,9 +177,8 @@ static void find_controls(void)
> err = snd_ctl_elem_info(card_data->handle,
> ctl_data->info);
> if (err < 0) {
> - ksft_print_msg("%s getting info for %d\n",
> - snd_strerror(err),
> - ctl_data->name);
> + ksft_print_msg("%s : %s while getting info\n",
> + ctl_data->name, snd_strerror(err));
> }
>
> snd_ctl_elem_value_set_id(ctl_data->def_val,
> @@ -192,20 +191,20 @@ static void find_controls(void)
> /* Set up for events */
> err = snd_ctl_subscribe_events(card_data->handle, true);
> if (err < 0) {
> - ksft_exit_fail_msg("snd_ctl_subscribe_events() failed for card %d: %d\n",
> + ksft_exit_fail_msg("Card %d : snd_ctl_subscribe_events() failed (%d)\n",
> card, err);
> }
>
> err = snd_ctl_poll_descriptors_count(card_data->handle);
> if (err != 1) {
> - ksft_exit_fail_msg("Unexpected descriptor count %d for card %d\n",
> - err, card);
> + ksft_exit_fail_msg("Card %d : Unexpected descriptor count %d\n",
> + card, err);
> }
>
> err = snd_ctl_poll_descriptors(card_data->handle,
> &card_data->pollfd, 1);
> if (err != 1) {
> - ksft_exit_fail_msg("snd_ctl_poll_descriptors() failed for %d\n",
> + ksft_exit_fail_msg("Card %d : snd_ctl_poll_descriptors() failed (%d)\n",
> card, err);
> }
>
> @@ -236,8 +235,8 @@ static int wait_for_event(struct ctl_data *ctl, int timeout)
> do {
> err = poll(&(ctl->card->pollfd), 1, timeout);
> if (err < 0) {
> - ksft_print_msg("poll() failed for %s: %s (%d)\n",
> - ctl->name, strerror(errno), errno);
> + ksft_print_msg("%s : poll() failed (%d - %s)\n",
> + ctl->name, errno, strerror(errno));
> return -1;
> }
> /* Timeout */
> @@ -248,12 +247,12 @@ static int wait_for_event(struct ctl_data *ctl, int timeout)
> &(ctl->card->pollfd),
> 1, &revents);
> if (err < 0) {
> - ksft_print_msg("snd_ctl_poll_descriptors_revents() failed for %s: %d\n",
> + ksft_print_msg("%s : snd_ctl_poll_descriptors_revents() failed (%d)\n",
> ctl->name, err);
> return err;
> }
> if (revents & POLLERR) {
> - ksft_print_msg("snd_ctl_poll_descriptors_revents() reported POLLERR for %s\n",
> + ksft_print_msg("%s : snd_ctl_poll_descriptors_revents() reported POLLERR\n",
> ctl->name);
> return -1;
> }
> @@ -265,7 +264,7 @@ static int wait_for_event(struct ctl_data *ctl, int timeout)
>
> err = snd_ctl_read(ctl->card->handle, event);
> if (err < 0) {
> - ksft_print_msg("snd_ctl_read() failed for %s: %d\n",
> + ksft_print_msg("%s : snd_ctl_read() failed (%d)\n",
> ctl->name, err);
> return err;
> }
> @@ -283,7 +282,7 @@ static int wait_for_event(struct ctl_data *ctl, int timeout)
> }
>
> if ((mask & SND_CTL_EVENT_MASK_REMOVE) == SND_CTL_EVENT_MASK_REMOVE) {
> - ksft_print_msg("Removal event for %s\n",
> + ksft_print_msg("%s : Removal event\n",
> ctl->name);
> return -1;
> }
> @@ -301,7 +300,7 @@ static bool ctl_value_index_valid(struct ctl_data *ctl,
>
> switch (snd_ctl_elem_info_get_type(ctl->info)) {
> case SND_CTL_ELEM_TYPE_NONE:
> - ksft_print_msg("%s.%d Invalid control type NONE\n",
> + ksft_print_msg("%s.%d : Invalid control type NONE\n",
> ctl->name, index);
> return false;
>
> @@ -312,7 +311,7 @@ static bool ctl_value_index_valid(struct ctl_data *ctl,
> case 1:
> break;
> default:
> - ksft_print_msg("%s.%d Invalid boolean value %ld\n",
> + ksft_print_msg("%s.%d : Invalid boolean value %ld\n",
> ctl->name, index, int_val);
> return false;
> }
> @@ -322,14 +321,14 @@ static bool ctl_value_index_valid(struct ctl_data *ctl,
> int_val = snd_ctl_elem_value_get_integer(val, index);
>
> if (int_val < snd_ctl_elem_info_get_min(ctl->info)) {
> - ksft_print_msg("%s.%d value %ld less than minimum %ld\n",
> + ksft_print_msg("%s.%d : Value %ld is less than the minimum (%ld)\n",
> ctl->name, index, int_val,
> snd_ctl_elem_info_get_min(ctl->info));
> return false;
> }
>
> if (int_val > snd_ctl_elem_info_get_max(ctl->info)) {
> - ksft_print_msg("%s.%d value %ld more than maximum %ld\n",
> + ksft_print_msg("%s.%d : Value %ld is more than the maximum (%ld)\n",
> ctl->name, index, int_val,
> snd_ctl_elem_info_get_max(ctl->info));
> return false;
> @@ -339,7 +338,7 @@ static bool ctl_value_index_valid(struct ctl_data *ctl,
> if (snd_ctl_elem_info_get_step(ctl->info) &&
> (int_val - snd_ctl_elem_info_get_min(ctl->info) %
> snd_ctl_elem_info_get_step(ctl->info))) {
> - ksft_print_msg("%s.%d value %ld invalid for step %ld minimum %ld\n",
> + ksft_print_msg("%s.%d : Value %ld is invalid for step %ld, minimum %ld\n",
> ctl->name, index, int_val,
> snd_ctl_elem_info_get_step(ctl->info),
> snd_ctl_elem_info_get_min(ctl->info));
> @@ -351,14 +350,14 @@ static bool ctl_value_index_valid(struct ctl_data *ctl,
> int64_val = snd_ctl_elem_value_get_integer64(val, index);
>
> if (int64_val < snd_ctl_elem_info_get_min64(ctl->info)) {
> - ksft_print_msg("%s.%d value %lld less than minimum %lld\n",
> + ksft_print_msg("%s.%d : Value %lld is less than the minimum (%lld)\n",
> ctl->name, index, int64_val,
> snd_ctl_elem_info_get_min64(ctl->info));
> return false;
> }
>
> if (int64_val > snd_ctl_elem_info_get_max64(ctl->info)) {
> - ksft_print_msg("%s.%d value %lld more than maximum %lld\n",
> + ksft_print_msg("%s.%d : Value %lld is more than the maximum (%lld)\n",
> ctl->name, index, int64_val,
> snd_ctl_elem_info_get_max(ctl->info));
> return false;
> @@ -368,7 +367,7 @@ static bool ctl_value_index_valid(struct ctl_data *ctl,
> if (snd_ctl_elem_info_get_step64(ctl->info) &&
> (int64_val - snd_ctl_elem_info_get_min64(ctl->info)) %
> snd_ctl_elem_info_get_step64(ctl->info)) {
> - ksft_print_msg("%s.%d value %lld invalid for step %lld minimum %lld\n",
> + ksft_print_msg("%s.%d : Value %lld is invalid for step %lld, minimum %lld\n",
> ctl->name, index, int64_val,
> snd_ctl_elem_info_get_step64(ctl->info),
> snd_ctl_elem_info_get_min64(ctl->info));
> @@ -380,13 +379,13 @@ static bool ctl_value_index_valid(struct ctl_data *ctl,
> int_val = snd_ctl_elem_value_get_enumerated(val, index);
>
> if (int_val < 0) {
> - ksft_print_msg("%s.%d negative value %ld for enumeration\n",
> + ksft_print_msg("%s.%d : Negative value %ld for enumeration\n",
> ctl->name, index, int_val);
> return false;
> }
>
> if (int_val >= snd_ctl_elem_info_get_items(ctl->info)) {
> - ksft_print_msg("%s.%d value %ld more than item count %ld\n",
> + ksft_print_msg("%s.%d : Value %ld is more than item count (%ld)\n",
> ctl->name, index, int_val,
> snd_ctl_elem_info_get_items(ctl->info));
> return false;
> @@ -427,7 +426,7 @@ static void test_ctl_get_value(struct ctl_data *ctl)
>
> /* If the control is turned off let's be polite */
> if (snd_ctl_elem_info_is_inactive(ctl->info)) {
> - ksft_print_msg("%s is inactive\n", ctl->name);
> + ksft_print_msg("%s : Inactive\n", ctl->name);
> ksft_test_result_skip("get_value.%d.%d\n",
> ctl->card->card, ctl->elem);
> return;
> @@ -435,7 +434,7 @@ static void test_ctl_get_value(struct ctl_data *ctl)
>
> /* Can't test reading on an unreadable control */
> if (!snd_ctl_elem_info_is_readable(ctl->info)) {
> - ksft_print_msg("%s is not readable\n", ctl->name);
> + ksft_print_msg("%s : Not readable\n", ctl->name);
> ksft_test_result_skip("get_value.%d.%d\n",
> ctl->card->card, ctl->elem);
> return;
> @@ -443,7 +442,7 @@ static void test_ctl_get_value(struct ctl_data *ctl)
>
> err = snd_ctl_elem_read(ctl->card->handle, ctl->def_val);
> if (err < 0) {
> - ksft_print_msg("snd_ctl_elem_read() failed: %s\n",
> + ksft_print_msg("snd_ctl_elem_read() failed (%s)\n",
> snd_strerror(err));
> goto out;
> }
> @@ -474,7 +473,7 @@ static void test_ctl_name(struct ctl_data *ctl)
> /* Only boolean controls should end in Switch */
> if (strend(ctl->name, " Switch")) {
> if (snd_ctl_elem_info_get_type(ctl->info) != SND_CTL_ELEM_TYPE_BOOLEAN) {
> - ksft_print_msg("%d.%d %s ends in Switch but is not boolean\n",
> + ksft_print_msg("%d.%d %s : Not a boolean, but name ends in Switch\n",
> ctl->card->card, ctl->elem, ctl->name);
> name_ok = false;
> }
> @@ -484,7 +483,7 @@ static void test_ctl_name(struct ctl_data *ctl)
> if (snd_ctl_elem_info_get_type(ctl->info) == SND_CTL_ELEM_TYPE_BOOLEAN &&
> snd_ctl_elem_info_is_writable(ctl->info)) {
> if (!strend(ctl->name, " Switch")) {
> - ksft_print_msg("%d.%d %s is a writeable boolean but not a Switch\n",
> + ksft_print_msg("%d.%d %s : Not a Switch despite being a writeable boolean\n",
> ctl->card->card, ctl->elem, ctl->name);
> name_ok = false;
> }
> @@ -542,11 +541,12 @@ static bool show_mismatch(struct ctl_data *ctl, int index,
> /*
> * NOTE: The volatile attribute means that the hardware
> * can voluntarily change the state of control element
> - * independent of any operation by software.
> + * independent of any operation by software.
> */
> bool is_volatile = snd_ctl_elem_info_is_volatile(ctl->info);
> - ksft_print_msg("%s.%d expected %lld but read %lld, is_volatile %d\n",
> - ctl->name, index, expected_int, read_int, is_volatile);
> + ksft_print_msg("%s.%d : Expected %lld, but read %lld (%s)\n",
> + ctl->name, index, expected_int, read_int,
> + (is_volatile ? "Volatile" : "Non-volatile"));
> return !is_volatile;
> } else {
> return false;
> @@ -590,7 +590,7 @@ static int write_and_verify(struct ctl_data *ctl,
>
> err = snd_ctl_elem_read(ctl->card->handle, initial_val);
> if (err < 0) {
> - ksft_print_msg("snd_ctl_elem_read() failed: %s\n",
> + ksft_print_msg("snd_ctl_elem_read() failed (%s)\n",
> snd_strerror(err));
> return err;
> }
> @@ -602,7 +602,7 @@ static int write_and_verify(struct ctl_data *ctl,
> */
> err = snd_ctl_elem_write(ctl->card->handle, w_val);
> if (err < 0 && !error_expected) {
> - ksft_print_msg("snd_ctl_elem_write() failed: %s\n",
> + ksft_print_msg("snd_ctl_elem_write() failed (%s)\n",
> snd_strerror(err));
> return err;
> }
> @@ -615,7 +615,7 @@ static int write_and_verify(struct ctl_data *ctl,
>
> err = snd_ctl_elem_read(ctl->card->handle, read_val);
> if (err < 0) {
> - ksft_print_msg("snd_ctl_elem_read() failed: %s\n",
> + ksft_print_msg("snd_ctl_elem_read() failed (%s)\n",
> snd_strerror(err));
> return err;
> }
> @@ -631,13 +631,13 @@ static int write_and_verify(struct ctl_data *ctl,
> err = wait_for_event(ctl, 0);
> if (snd_ctl_elem_value_compare(initial_val, read_val)) {
> if (err < 1) {
> - ksft_print_msg("No event generated for %s\n",
> + ksft_print_msg("%s : No event generated\n",
> ctl->name);
> ctl->event_missing++;
> }
> } else {
> if (err != 0) {
> - ksft_print_msg("Spurious event generated for %s\n",
> + ksft_print_msg("%s : Spurious event generated\n",
> ctl->name);
> ctl->event_spurious++;
> }
> @@ -658,7 +658,7 @@ static int write_and_verify(struct ctl_data *ctl,
> mismatch_shown = true;
>
> if (!mismatch_shown)
> - ksft_print_msg("%s read and written values differ\n",
> + ksft_print_msg("%s : Read and written values differ\n",
> ctl->name);
>
> return -1;
> @@ -674,14 +674,14 @@ static void test_ctl_write_default(struct ctl_data *ctl)
>
> /* If the control is turned off let's be polite */
> if (snd_ctl_elem_info_is_inactive(ctl->info)) {
> - ksft_print_msg("%s is inactive\n", ctl->name);
> + ksft_print_msg("%s : Inactive\n", ctl->name);
> ksft_test_result_skip("write_default.%d.%d\n",
> ctl->card->card, ctl->elem);
> return;
> }
>
> if (!snd_ctl_elem_info_is_writable(ctl->info)) {
> - ksft_print_msg("%s is not writeable\n", ctl->name);
> + ksft_print_msg("%s : Not writeable\n", ctl->name);
> ksft_test_result_skip("write_default.%d.%d\n",
> ctl->card->card, ctl->elem);
> return;
> @@ -689,7 +689,7 @@ static void test_ctl_write_default(struct ctl_data *ctl)
>
> /* No idea what the default was for unreadable controls */
> if (!snd_ctl_elem_info_is_readable(ctl->info)) {
> - ksft_print_msg("%s couldn't read default\n", ctl->name);
> + ksft_print_msg("%s : Couldn't read default\n", ctl->name);
> ksft_test_result_skip("write_default.%d.%d\n",
> ctl->card->card, ctl->elem);
> return;
> @@ -808,14 +808,14 @@ static void test_ctl_write_valid(struct ctl_data *ctl)
>
> /* If the control is turned off let's be polite */
> if (snd_ctl_elem_info_is_inactive(ctl->info)) {
> - ksft_print_msg("%s is inactive\n", ctl->name);
> + ksft_print_msg("%s : Inactive\n", ctl->name);
> ksft_test_result_skip("write_valid.%d.%d\n",
> ctl->card->card, ctl->elem);
> return;
> }
>
> if (!snd_ctl_elem_info_is_writable(ctl->info)) {
> - ksft_print_msg("%s is not writeable\n", ctl->name);
> + ksft_print_msg("%s : Not writeable\n", ctl->name);
> ksft_test_result_skip("write_valid.%d.%d\n",
> ctl->card->card, ctl->elem);
> return;
> @@ -868,7 +868,7 @@ static bool test_ctl_write_invalid_value(struct ctl_data *ctl,
> /* ...but some devices will clamp to an in range value */
> err = snd_ctl_elem_read(ctl->card->handle, val);
> if (err < 0) {
> - ksft_print_msg("%s failed to read: %s\n",
> + ksft_print_msg("%s : Failed to read (%s)\n",
> ctl->name, snd_strerror(err));
> return true;
> }
> @@ -1026,14 +1026,14 @@ static void test_ctl_write_invalid(struct ctl_data *ctl)
>
> /* If the control is turned off let's be polite */
> if (snd_ctl_elem_info_is_inactive(ctl->info)) {
> - ksft_print_msg("%s is inactive\n", ctl->name);
> + ksft_print_msg("%s : Inactive\n", ctl->name);
> ksft_test_result_skip("write_invalid.%d.%d\n",
> ctl->card->card, ctl->elem);
> return;
> }
>
> if (!snd_ctl_elem_info_is_writable(ctl->info)) {
> - ksft_print_msg("%s is not writeable\n", ctl->name);
> + ksft_print_msg("%s : Not writeable\n", ctl->name);
> ksft_test_result_skip("write_invalid.%d.%d\n",
> ctl->card->card, ctl->elem);
> return;
> --
> 2.35.1
>
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