[Bug 29572] Radeon card reports wrong temperature when switched off

[<bug...@bu...>]

https://bugzilla.kernel.org/show_bug.cgi?id=29572





--- Comment #5 from Andrew Morton <ak...@li...>  2011-02-24 05:14:11 ---
(In reply to comment #4)
> The old behavior was wrong.

Don't care really. We shouldn't change interfaces.

>  The temperature value in the register was
> interpreted incorrectly prior to my recent patch (improper handling of signed
> values).

That seems unrelated.

>  Also, if the card is disabled, the value of the mmio registers is
> undefined.

So reads should have returned -EINVAL from day one.  Too late to fix that.  The
best thing to do now would be to detect this situation and to return zero,
preserving the API.

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