The function acpi_driver_data() will dereference its parameter; make sure to check for NULL pointer before we call it.
Signed-off-by: Vincent Stehlé <[email protected]> Cc: Sujith Thomas <[email protected]> Cc: Darren Hart <[email protected]> Cc: Zhang Rui <[email protected]> Cc: Len Brown <[email protected]> --- drivers/platform/x86/intel_menlow.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/platform/x86/intel_menlow.c b/drivers/platform/x86/intel_menlow.c index 0a919d8..185a1bd 100644 --- a/drivers/platform/x86/intel_menlow.c +++ b/drivers/platform/x86/intel_menlow.c @@ -196,9 +196,13 @@ static int intel_menlow_memory_add(struct acpi_device *device) static int intel_menlow_memory_remove(struct acpi_device *device) { - struct thermal_cooling_device *cdev = acpi_driver_data(device); + struct thermal_cooling_device *cdev; + + if (!device) + return -EINVAL; - if (!device || !cdev) + cdev = acpi_driver_data(device); + if (!cdev) return -EINVAL; sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); -- 2.8.1
