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Date: Sun, 23 Jun 2019 18:25:37 +0200 From: Andrew Lunn <andrew@...n.ch> To: Vadim Pasternak <vadimp@...lanox.com> Cc: Ido Schimmel <idosch@...sch.org>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "davem@...emloft.net" <davem@...emloft.net>, Jiri Pirko <jiri@...lanox.com>, mlxsw <mlxsw@...lanox.com>, Ido Schimmel <idosch@...lanox.com> 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 cracks? 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. Andrew
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