linux-kernel - [PATCH v2 4/4] kselftest/alsa - conf: Stringify the printed errno in sysfs

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Date: Sun,  7 Jan 2024 18:37:08 +0100
From: Mirsad Todorovac <mirsad.todorovac@....unizg.hr>
To: Nícolas F. R. A. Prado <nfraprado@...labora.com>,
	Mark Brown <broonie@...nel.org>,
	linux-sound@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>,
	Shuah Khan <shuah@...nel.org>,
	Mirsad Todorovac <mirsad.todorovac@....unizg.hr>
Subject: [PATCH v2 4/4] kselftest/alsa - conf: Stringify the printed errno in sysfs_get()

GCC 13.2.0 reported the warning of the print format specifier:

conf.c: In function ‘sysfs_get’:
conf.c:181:72: warning: format ‘%s’ expects argument of type ‘char *’, \
			but argument 3 has type ‘int’ [-Wformat=]
  181 |                 ksft_exit_fail_msg("sysfs: unable to read value '%s': %s\n",
      |                                                                       ~^
      |                                                                        |
      |                                                                        char *
      |                                                                       %d

The fix passes strerror(errno) as it was intended, like in the sibling error
exit message.

Fixes: aba51cd0949ae ("selftests: alsa - add PCM test")
Cc: Mark Brown <broonie@...nel.org>
Cc: Jaroslav Kysela <perex@...ex.cz>
Cc: Takashi Iwai <tiwai@...e.com>
Cc: Shuah Khan <shuah@...nel.org>
Cc: linux-sound@...r.kernel.org
Cc: linux-kselftest@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Mirsad Todorovac <mirsad.todorovac@....unizg.hr>
---
v1 -> v2:
 Changed the subject line as suggested to reflect the style of the subsystem.
 No change to the code.

 tools/testing/selftests/alsa/conf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/alsa/conf.c b/tools/testing/selftests/alsa/conf.c
index 00925eb8d9f4..89e3656a042d 100644
--- a/tools/testing/selftests/alsa/conf.c
+++ b/tools/testing/selftests/alsa/conf.c
@@ -179,7 +179,7 @@ static char *sysfs_get(const char *sysfs_root, const char *id)
 	close(fd);
 	if (len < 0)
 		ksft_exit_fail_msg("sysfs: unable to read value '%s': %s\n",
-				   path, errno);
+				   path, strerror(errno));
 	while (len > 0 && path[len-1] == '\n')
 		len--;
 	path[len] = '\0';
-- 
2.40.1