summaryrefslogtreecommitdiffstats
path: root/tools/testing/selftests/gpio
diff options
context:
space:
mode:
authorGeert Uytterhoeven <geert+renesas@glider.be>2019-01-14 14:51:33 +0100
committerShuah Khan <shuah@kernel.org>2019-01-16 15:02:57 -0700
commit508cacd7da6659ae7b7bdd0a335f675422277758 (patch)
tree8171cf2aade696312fea07ef6ab5c61a323df4cf /tools/testing/selftests/gpio
parent5bbc73a841d7f0bbe025a342146dde462a796a5a (diff)
downloadlinux-508cacd7da6659ae7b7bdd0a335f675422277758.tar.bz2
selftests: gpio-mockup-chardev: Check asprintf() for error
With gcc 7.3.0: gpio-mockup-chardev.c: In function ‘get_debugfs’: gpio-mockup-chardev.c:62:3: warning: ignoring return value of ‘asprintf’, declared with attribute warn_unused_result [-Wunused-result] asprintf(path, "%s/gpio", mnt_fs_get_target(fs)); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Handle asprintf() failures to fix this. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Shuah Khan <shuah@kernel.org>
Diffstat (limited to 'tools/testing/selftests/gpio')
-rw-r--r--tools/testing/selftests/gpio/gpio-mockup-chardev.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/tools/testing/selftests/gpio/gpio-mockup-chardev.c b/tools/testing/selftests/gpio/gpio-mockup-chardev.c
index f8d468f54e98..aaa1e9f083c3 100644
--- a/tools/testing/selftests/gpio/gpio-mockup-chardev.c
+++ b/tools/testing/selftests/gpio/gpio-mockup-chardev.c
@@ -37,7 +37,7 @@ static int get_debugfs(char **path)
struct libmnt_table *tb;
struct libmnt_iter *itr = NULL;
struct libmnt_fs *fs;
- int found = 0;
+ int found = 0, ret;
cxt = mnt_new_context();
if (!cxt)
@@ -58,8 +58,11 @@ static int get_debugfs(char **path)
break;
}
}
- if (found)
- asprintf(path, "%s/gpio", mnt_fs_get_target(fs));
+ if (found) {
+ ret = asprintf(path, "%s/gpio", mnt_fs_get_target(fs));
+ if (ret < 0)
+ err(EXIT_FAILURE, "failed to format string");
+ }
mnt_free_iter(itr);
mnt_free_context(cxt);