Commit ad0f4090 authored Jan 04, 2015 by Zhang Rui

int340x_thermal/processor_thermal_device: return failure when



 there is no ACPI device object

processor_thermal_device driver needs ACPI support to work. Thus, the driver
probing should fail when there is no ACPI device object asscociated.

This fixes a NULL pointer dereference when the driver is loaded
with INT340X feature disabled in BIOS.

Reported-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Chen Yu <yu.c.chen@intel.com>

parent 014d9d5d

drivers/thermal/int340x_thermal/processor_thermal_device.c

+2 −0

Original line number	Original line	Diff line number	Diff line
	@@ -130,6 +130,8 @@ static int proc_thermal_add(struct device *dev,
	int ret;		int ret;

	adev = ACPI_COMPANION(dev);		adev = ACPI_COMPANION(dev);
			if (!adev)
			return -ENODEV;

	status = acpi_evaluate_object(adev->handle, "PPCC", NULL, &buf);		status = acpi_evaluate_object(adev->handle, "PPCC", NULL, &buf);
	if (ACPI_FAILURE(status))		if (ACPI_FAILURE(status))