提交 f352e84e 编写于 作者: G Geert Uytterhoeven 提交者: Greg Kroah-Hartman

selftests: gpio-mockup-chardev: Check asprintf() for error

[ Upstream commit 508cacd7da6659ae7b7bdd0a335f675422277758 ]

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: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NShuah Khan <shuah@kernel.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>
上级 357d9c7a
......@@ -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);
......
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