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| author | Zhang Rui <rui.zhang@intel.com> | 2015-01-04 16:35:59 +0800 |
|---|---|---|
| committer | Zhang Rui <rui.zhang@intel.com> | 2015-01-06 08:18:21 +0800 |
| commit | ad0f409051a67dde8d454990e09b6db41f675876 (patch) | |
| tree | b79ff6772c54d2c7f3955a88e639b461c4176199 | |
| parent | 014d9d5d0cc1da79bbe48fbc5e1068c5616238d2 (diff) | |
| download | linux-ad0f409051a67dde8d454990e09b6db41f675876.tar.gz linux-ad0f409051a67dde8d454990e09b6db41f675876.tar.xz | |
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>
| -rw-r--r-- | drivers/thermal/int340x_thermal/processor_thermal_device.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/thermal/int340x_thermal/processor_thermal_device.c b/drivers/thermal/int340x_thermal/processor_thermal_device.c index 31bb553aac26..0fe5dbbea968 100644 --- a/drivers/thermal/int340x_thermal/processor_thermal_device.c +++ b/drivers/thermal/int340x_thermal/processor_thermal_device.c @@ -130,6 +130,8 @@ static int proc_thermal_add(struct device *dev, int ret; adev = ACPI_COMPANION(dev); + if (!adev) + return -ENODEV; status = acpi_evaluate_object(adev->handle, "PPCC", NULL, &buf); if (ACPI_FAILURE(status)) |