Re: [PATCH] intel_idle: PCI quirk to prevent Lenovo Ideapad s10-3boot hang

[Matthew Garrett]

On Fri, Sep 24, 2010 at 09:26:31PM -0400, Len Brown wrote:
> From: Len Brown <len.brown@xxxxxxxxx>
> 
> When the Lenovo Ideapad S10-3 is booted with HT enabled,
> it hits a boot hang in the intel_idle driver.
> 
> This occurs when entering ATM-C4 for the first time,
> unless BM_STS is first cleared.
> 
> acpi_idle doesn't see this because it first checks
> and clears BM_STS, but it would hit the same hang
> if that check were disabled.

If there's hardware that expects BM_STS to be cleared, and if we've 
previously always cleared BM_STS, shouldn't intel_idle be doing the same 
thing?

-- 
Matthew Garrett | mjg59@xxxxxxxxxxxxx
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