From mboxrd@z Thu Jan  1 00:00:00 1970
From: Hanjun Guo <guohanjun@huawei.com>
Subject: Does ACPI thermal driver support temperature under zero?
Date: Fri, 6 Feb 2015 11:02:38 +0800
Message-ID: <54D42ECE.4040600@huawei.com>
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To: Zhang Rui <rui.zhang@intel.com>
Cc: linux-pm@vger.kernel.org, sangyan@huawei.com

Hi,

My colleague was testing the system booting in temprature at -20 =E2=84=
=83,
then the system print "thermal_sys: Critical temperature reached (244 C=
),
shutting down", and the system shutdown as not expected.

The system is using avoton CPU and the kernel version is 3.4 stable, I
just find that in the latest of version of kernel, all the temperature =
variable
in thermal structure is unsigned, it seems that in thermal_get_temp()
in drivers/acpi/thermal.c, *temp will be a large value if temperature
under zero, did I miss something?

Any help or guidance will be appreciated a lot.

Thanks
Hanjun