Re: [RFC PATCH 0/4] mmc: sdhci: Support maximum DMA latency request via PM QoS

From: Adrian Hunter
Date: Thu Mar 26 2015 - 04:31:19 EST


On 25/03/15 21:43, Pavel Machek wrote:
> Hi!
>
>> Here are some patches to address an issue with SDHCI
>> in Intel Baytrail. Intel Baytrail has been observed
>> sometimes to hang if host controllers are using DMA
>> while deep C-states are used. Workaround that by
>
> I wonder if there is more information on this one? I see your address
> is "@intel". For example which C states are affected, and if there's

The problem starts at C6 - I will add that to the commit message.

> maybe Intel errata number to quote?

I wasn't able to find an errata number.

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