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Date:   Sun, 23 Jun 2019 18:25:37 +0200
From:   Andrew Lunn <>
To:     Vadim Pasternak <>
Cc:     Ido Schimmel <>,
        "" <>,
        "" <>,
        Jiri Pirko <>, mlxsw <>,
        Ido Schimmel <>
Subject: Re: [PATCH net-next 3/3] mlxsw: core: Add support for negative
 temperature readout

> > Why the > 0?
> We don't consider negative temperature for thermal control.

Is this because the thermal control is also broken and does not
support negative values? This is just a workaround papering over the

I've worked on some systems where the thermal subsystem has controller
a heater. Mostly industrial systems, extended temperature range, and
you have to make sure the hardware is kept above -25C, otherwise the
DRAM timing goes to pot and the system crashed and froze.


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