From: Rudolf Marek <r.marek@assembler.cz>
To: lm-sensors@vger.kernel.org
Subject: Re: [lm-sensors] w83793 related question
Date: Thu, 23 Apr 2009 06:57:22 +0000 [thread overview]
Message-ID: <49F01152.30108@assembler.cz> (raw)
In-Reply-To: <49E45712.6020906@aei.mpg.de>
> What makes you think there is a relation between SMM and ACPI?
There should be. See ACPI specs and Global lock chapter. It should be a hw lock
between ACPI and SMM code touching the hw. Maybe we are lucky and something like
this is really implemented.
But since the 1) is true I would suspect that we just see some other transactions.
>> 3) Make a driver more bullet proof. Maybe it would be possible somehow to force
>> the driver to have a longer timeouts, more retries etc.
>
> This is pointless. If another entity is accessing the chip without
> proper locking, no amount of timeouts or retries will help. In this
> scenario, reported errors are in fact the best thing than can happen.
> The worst case is silent misbehavior.
It is not pointless if this entity is just observed. I mean it is not using the
i2c hw like our driver but it is using the bus itself.
Thanks,
Rudolf
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prev parent reply other threads:[~2009-04-23 6:57 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-14 9:27 [lm-sensors] w83793 related question Carsten Aulbert
2009-04-19 9:11 ` Rudolf Marek
2009-04-20 10:21 ` Carsten Aulbert
2009-04-20 19:41 ` Rudolf Marek
2009-04-20 19:44 ` Carsten Aulbert
2009-04-20 20:40 ` Carsten Aulbert
2009-04-22 20:16 ` Rudolf Marek
2009-04-22 20:27 ` Carsten Aulbert
2009-04-22 20:57 ` Jean Delvare
2009-04-23 6:57 ` Rudolf Marek [this message]
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