Re: [PATCH v2 1/2] hwmon: (lm90) Prevent integer overflow of temperature calculations

[Dmitry Osipenko]

21.06.2021 15:12, Guenter Roeck пишет:
> On Mon, Jun 21, 2021 at 12:14:07AM +0300, Dmitry Osipenko wrote:
>> The minimum temperature value that is passed to the driver is unlimited
>> and value that is close to INT_MIN results in integer overflow of
>> temperature calculations made by the driver. Limit the value in order
>> to prevent the overflow. For now the overflow condition is harmless,
>> but thermal framework won't work properly once we will support the
>> set_trips() callback because it will pass INT_MIN value to the driver.
>>
> AFAICS that should only happen for lm99 because all other values
> are bound in the temp_to_xxx functions. Where else do you see an
> overflow (or underflow) ?

You're correct that the overflow affects only lm99. But why we should
ignore it?