3 files changed, 21 insertions, 11 deletions
diff --git a/drivers/thermal/testing/command.c b/drivers/thermal/testing/command.c
index 1159ecea57e7..fbf7ab9729b5 100644
--- a/drivers/thermal/testing/command.c
+++ b/drivers/thermal/testing/command.c
@@ -116,18 +116,30 @@ static int tt_command_exec(int index, const char *arg)
 		break;
 
 	case TT_CMD_DELTZ:
+		if (!arg || !*arg)
+			return -EINVAL;
+
 		ret = tt_del_tz(arg);
 		break;
 
 	case TT_CMD_TZADDTRIP:
+		if (!arg || !*arg)
+			return -EINVAL;
+
 		ret = tt_zone_add_trip(arg);
 		break;
 
 	case TT_CMD_TZREG:
+		if (!arg || !*arg)
+			return -EINVAL;
+
 		ret = tt_zone_reg(arg);
 		break;
 
 	case TT_CMD_TZUNREG:
+		if (!arg || !*arg)
+			return -EINVAL;
+
 		ret = tt_zone_unreg(arg);
 		break;
 
diff --git a/drivers/thermal/testing/zone.c b/drivers/thermal/testing/zone.c
index 3c339242f52d..f7f9ca2f1f2c 100644
--- a/drivers/thermal/testing/zone.c
+++ b/drivers/thermal/testing/zone.c
@@ -239,9 +239,9 @@ int tt_del_tz(const char *arg)
 	int ret;
 	int id;
 
-	ret = sscanf(arg, "%d", &id);
-	if (ret != 1)
-		return -EINVAL;
+	ret = kstrtoint(arg, 10, &id);
+	if (ret < 0)
+		return ret;
 
 	struct tt_work *tt_work __free(kfree) = kzalloc_obj(*tt_work);
 	if (!tt_work)
@@ -279,9 +279,9 @@ static struct tt_thermal_zone *tt_get_tt_zone(const char *arg)
 	struct tt_thermal_zone *tt_zone;
 	int ret, id;
 
-	ret = sscanf(arg, "%d", &id);
-	if (ret != 1)
-		return ERR_PTR(-EINVAL);
+	ret = kstrtoint(arg, 10, &id);
+	if (ret < 0)
+		return ERR_PTR(ret);
 
 	guard(mutex)(&tt_thermal_zones_lock);
 
diff --git a/drivers/thermal/thermal_sysfs.c b/drivers/thermal/thermal_sysfs.c
index 9f2f25a6da37..b44abfc997ed 100644
--- a/drivers/thermal/thermal_sysfs.c
+++ b/drivers/thermal/thermal_sysfs.c
@@ -536,11 +536,9 @@ cur_state_store(struct device *dev, struct device_attribute *attr,
 	unsigned long state;
 	int result;
 
-	if (sscanf(buf, "%ld\n", &state) != 1)
-		return -EINVAL;
-
-	if ((long)state < 0)
-		return -EINVAL;
+	result = kstrtoul(buf, 10, &state);
+	if (result < 0)
+		return result;
 
 	/* Requested state should be less than max_state + 1 */
 	if (state > cdev->max_state)