From: "Li Wang (Hieco)" <li.wang@linux.dev>
To: ltp@lists.linux.it
Subject: [LTP] [PATCH] sys_hwmon01: always report a result
Date: Mon, 19 Oct 2026 16:45:33 +0800 [thread overview]
Message-ID: <20261019084533.70801-1-li.wang@linux.dev> (raw)
On machines where the only hwmon devices expose no checkable
attributes (e.g. a VM or laptop where hwmon0 is just 'ACAD' with
nothing but a name attribute), every *_SILENT assertion skips
silently and the test finishes without reporting a single result,
which the library turns into:
tst_test.c:1730: TBROK: Test haven't reported results!
Fix this by counting the attributes that actually exist and get
validated, then report a TPASS summary at the end, or TCONF when
hwmon devices are present but expose nothing we can check.
Signed-off-by: Li Wang (Hieco) <li.wang@linux.dev>
---
.../kernel/sysfs/class/hwmon/sys_hwmon01.c | 109 ++++++++++++------
1 file changed, 76 insertions(+), 33 deletions(-)
diff --git a/testcases/kernel/sysfs/class/hwmon/sys_hwmon01.c b/testcases/kernel/sysfs/class/hwmon/sys_hwmon01.c
index 1bb574c23..8ecbd47d1 100644
--- a/testcases/kernel/sysfs/class/hwmon/sys_hwmon01.c
+++ b/testcases/kernel/sysfs/class/hwmon/sys_hwmon01.c
@@ -49,6 +49,8 @@
#include <string.h>
#include <dirent.h>
+#include <stdarg.h>
+#include <limits.h>
#include "tst_test.h"
#include "tst_sysfs_assert.h"
@@ -56,39 +58,67 @@
#define MAX_CHANNELS 32
+static unsigned int checked;
+
+static int attr_exists(const char *fmt, ...)
+{
+ char path[PATH_MAX];
+ va_list va;
+
+ va_start(va, fmt);
+ vsnprintf(path, sizeof(path), fmt, va);
+ va_end(va);
+
+ return tst_sysfs_exists(path);
+}
+
+#define CHECK_RANGELL(lo, hi, ...) do { \
+ if (attr_exists(__VA_ARGS__)) { \
+ checked++; \
+ TST_SYSFS_ASSERT_RANGELL_SILENT(lo, hi, __VA_ARGS__); \
+ } \
+} while (0)
+
+#define CHECK_BOOL(...) do { \
+ if (attr_exists(__VA_ARGS__)) { \
+ checked++; \
+ TST_SYSFS_ASSERT_BOOL_SILENT(__VA_ARGS__); \
+ } \
+} while (0)
+
static void check_temp_channel(const char *hwmon, int idx)
{
- TST_SYSFS_ASSERT_RANGELL_SILENT(-55000, 200000,
- PATH_CLASS_HWMON "/%s/temp%d_input", hwmon, idx);
-
- TST_SYSFS_ASSERT_BOOL_SILENT(PATH_CLASS_HWMON "/%s/temp%d_alarm", hwmon, idx);
- TST_SYSFS_ASSERT_BOOL_SILENT(PATH_CLASS_HWMON "/%s/temp%d_crit_alarm", hwmon, idx);
- TST_SYSFS_ASSERT_BOOL_SILENT(PATH_CLASS_HWMON "/%s/temp%d_min_alarm", hwmon, idx);
- TST_SYSFS_ASSERT_BOOL_SILENT(PATH_CLASS_HWMON "/%s/temp%d_max_alarm", hwmon, idx);
- TST_SYSFS_ASSERT_BOOL_SILENT(PATH_CLASS_HWMON "/%s/temp%d_fault", hwmon, idx);
+ CHECK_RANGELL(-55000, 200000,
+ PATH_CLASS_HWMON "/%s/temp%d_input", hwmon, idx);
+
+ CHECK_BOOL(PATH_CLASS_HWMON "/%s/temp%d_alarm", hwmon, idx);
+ CHECK_BOOL(PATH_CLASS_HWMON "/%s/temp%d_crit_alarm", hwmon, idx);
+ CHECK_BOOL(PATH_CLASS_HWMON "/%s/temp%d_min_alarm", hwmon, idx);
+ CHECK_BOOL(PATH_CLASS_HWMON "/%s/temp%d_max_alarm", hwmon, idx);
+ CHECK_BOOL(PATH_CLASS_HWMON "/%s/temp%d_fault", hwmon, idx);
}
static void check_fan_channel(const char *hwmon, int idx)
{
- TST_SYSFS_ASSERT_RANGELL_SILENT(0, 100000,
- PATH_CLASS_HWMON "/%s/fan%d_input", hwmon, idx);
+ CHECK_RANGELL(0, 100000,
+ PATH_CLASS_HWMON "/%s/fan%d_input", hwmon, idx);
- TST_SYSFS_ASSERT_BOOL_SILENT(PATH_CLASS_HWMON "/%s/fan%d_alarm", hwmon, idx);
- TST_SYSFS_ASSERT_BOOL_SILENT(PATH_CLASS_HWMON "/%s/fan%d_min_alarm", hwmon, idx);
- TST_SYSFS_ASSERT_BOOL_SILENT(PATH_CLASS_HWMON "/%s/fan%d_max_alarm", hwmon, idx);
- TST_SYSFS_ASSERT_BOOL_SILENT(PATH_CLASS_HWMON "/%s/fan%d_fault", hwmon, idx);
+ CHECK_BOOL(PATH_CLASS_HWMON "/%s/fan%d_alarm", hwmon, idx);
+ CHECK_BOOL(PATH_CLASS_HWMON "/%s/fan%d_min_alarm", hwmon, idx);
+ CHECK_BOOL(PATH_CLASS_HWMON "/%s/fan%d_max_alarm", hwmon, idx);
+ CHECK_BOOL(PATH_CLASS_HWMON "/%s/fan%d_fault", hwmon, idx);
}
static void check_in_channel(const char *hwmon, int idx)
{
- TST_SYSFS_ASSERT_RANGELL_SILENT(-100000, 100000,
- PATH_CLASS_HWMON "/%s/in%d_input", hwmon, idx);
-
- TST_SYSFS_ASSERT_BOOL_SILENT(PATH_CLASS_HWMON "/%s/in%d_alarm", hwmon, idx);
- TST_SYSFS_ASSERT_BOOL_SILENT(PATH_CLASS_HWMON "/%s/in%d_min_alarm", hwmon, idx);
- TST_SYSFS_ASSERT_BOOL_SILENT(PATH_CLASS_HWMON "/%s/in%d_max_alarm", hwmon, idx);
- TST_SYSFS_ASSERT_BOOL_SILENT(PATH_CLASS_HWMON "/%s/in%d_crit_alarm", hwmon, idx);
- TST_SYSFS_ASSERT_BOOL_SILENT(PATH_CLASS_HWMON "/%s/in%d_lcrit_alarm", hwmon, idx);
+ CHECK_RANGELL(-100000, 100000,
+ PATH_CLASS_HWMON "/%s/in%d_input", hwmon, idx);
+
+ CHECK_BOOL(PATH_CLASS_HWMON "/%s/in%d_alarm", hwmon, idx);
+ CHECK_BOOL(PATH_CLASS_HWMON "/%s/in%d_min_alarm", hwmon, idx);
+ CHECK_BOOL(PATH_CLASS_HWMON "/%s/in%d_max_alarm", hwmon, idx);
+ CHECK_BOOL(PATH_CLASS_HWMON "/%s/in%d_crit_alarm", hwmon, idx);
+ CHECK_BOOL(PATH_CLASS_HWMON "/%s/in%d_lcrit_alarm", hwmon, idx);
}
static void check_curr_channel(const char *hwmon, int idx)
@@ -97,10 +127,10 @@ static void check_curr_channel(const char *hwmon, int idx)
* Unlike fan/power, current can be negative on bidirectional sensors,
* e.g. a battery charge/discharge current monitor.
*/
- TST_SYSFS_ASSERT_RANGELL_SILENT(-500000, 500000,
- PATH_CLASS_HWMON "/%s/curr%d_input", hwmon, idx);
+ CHECK_RANGELL(-500000, 500000,
+ PATH_CLASS_HWMON "/%s/curr%d_input", hwmon, idx);
- TST_SYSFS_ASSERT_BOOL_SILENT(PATH_CLASS_HWMON "/%s/curr%d_alarm", hwmon, idx);
+ CHECK_BOOL(PATH_CLASS_HWMON "/%s/curr%d_alarm", hwmon, idx);
}
static void check_power_channel(const char *hwmon, int idx)
@@ -110,13 +140,13 @@ static void check_power_channel(const char *hwmon, int idx)
* sensor (CPU, GPU, PSU rail, ...) while still fitting within
* LONG_MAX on 32bit architectures.
*/
- TST_SYSFS_ASSERT_RANGELL_SILENT(0, 2000000000,
- PATH_CLASS_HWMON "/%s/power%d_input", hwmon, idx);
+ CHECK_RANGELL(0, 2000000000,
+ PATH_CLASS_HWMON "/%s/power%d_input", hwmon, idx);
}
static void check_pwm_channel(const char *hwmon, int idx)
{
- TST_SYSFS_ASSERT_RANGELL_SILENT(0, 255, PATH_CLASS_HWMON "/%s/pwm%d", hwmon, idx);
+ CHECK_RANGELL(0, 255, PATH_CLASS_HWMON "/%s/pwm%d", hwmon, idx);
}
static void check_hwmon_device(const char *hwmon)
@@ -127,8 +157,8 @@ static void check_hwmon_device(const char *hwmon)
if (TST_SYSFS_READ_STR(name, sizeof(name), PATH_CLASS_HWMON "/%s/name", hwmon))
tst_res(TINFO, "%s: name = '%s'", hwmon, name);
- TST_SYSFS_ASSERT_RANGELL_SILENT(1, 3600000,
- PATH_CLASS_HWMON "/%s/update_interval", hwmon);
+ CHECK_RANGELL(1, 3600000,
+ PATH_CLASS_HWMON "/%s/update_interval", hwmon);
/* inN channels are numbered from 0, per the hwmon ABI */
for (i = 0; i <= MAX_CHANNELS; i++)
@@ -147,7 +177,9 @@ static void do_test(void)
{
DIR *d;
struct dirent *ent;
- int found = 0;
+ int devices = 0;
+
+ checked = 0;
if (!tst_sysfs_exists(PATH_CLASS_HWMON))
tst_brk(TCONF, PATH_CLASS_HWMON ": not present");
@@ -158,14 +190,25 @@ static void do_test(void)
if (strncmp(ent->d_name, "hwmon", 5))
continue;
- found = 1;
+ devices++;
check_hwmon_device(ent->d_name);
}
SAFE_CLOSEDIR(d);
- if (!found)
+ if (!devices) {
tst_res(TCONF, "No hwmon device found");
+ return;
+ }
+
+ if (checked) {
+ tst_res(TPASS, "Validated %u attributes on %d hwmon devices",
+ checked, devices);
+ } else {
+ tst_res(TCONF,
+ "%d hwmon devices present, but no checkable attributes",
+ devices);
+ }
}
static struct tst_test test = {
--
2.56.0
--
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