[PATCH] thermal: int340x: Add Null check for adev

[Chenyuan Yang]

Not all devices have an ACPI companion fwnode, so adev might be NULL.
This is similar to the commit cd2fd6eab480
("platform/x86: int3472: Check for adev == NULL").

Add a check for adev not being set and return -ENODEV in that case to
avoid a possible NULL pointer deref in int3402_thermal_probe().

Note, under the same directory, int3400_thermal_probe() has such a
check.

Signed-off-by: Chenyuan Yang <chenyuan0y@xxxxxxxxx>
---
 drivers/thermal/intel/int340x_thermal/int3402_thermal.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/thermal/intel/int340x_thermal/int3402_thermal.c b/drivers/thermal/intel/int340x_thermal/int3402_thermal.c
index 543b03960e99..57b90005888a 100644
--- a/drivers/thermal/intel/int340x_thermal/int3402_thermal.c
+++ b/drivers/thermal/intel/int340x_thermal/int3402_thermal.c
@@ -45,6 +45,9 @@ static int int3402_thermal_probe(struct platform_device *pdev)
 	struct int3402_thermal_data *d;
 	int ret;
 
+	if (!adev)
+		return -ENODEV;
+
 	if (!acpi_has_method(adev->handle, "_TMP"))
 		return -ENODEV;
 
-- 
2.34.1