linux-kernel - Re: Possible nvme regression in 6.4.11

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Message-ID: <5d38cf11-114a-4997-a0fc-4627402468f8@sapience.com>
Date:   Wed, 30 Aug 2023 17:09:07 -0400
From:   Genes Lists <lists@...ience.com>
To:     Ricky WU <ricky_wu@...ltek.com>, Keith Busch <kbusch@...nel.org>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "axboe@...nel.dk" <axboe@...nel.dk>,
        "sagi@...mberg.me" <sagi@...mberg.me>,
        "linux-nvme@...ts.infradead.org" <linux-nvme@...ts.infradead.org>,
        "hch@....de" <hch@....de>, "arnd@...db.de" <arnd@...db.de>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
Subject: Re: Possible nvme regression in 6.4.11

...
> I think maybe it is a system power saving issue....
> In the past if the BIOS(config space) not set L1-substate, our driver will keep drive low CLKREQ# when HOST want to enter power saving state that make whole system not enter the power saving state.
> But this patch we release the CLKREQ# to HOST, make whole system can enter power saving state success when the HOST want to enter the power saving state, but I don't  know why your system can not wake out success from power saving stat on the platform
> 
> Ricky
>      

Hi

    Thanks for continuing to look into this. Can you share your thoughts 
on best way to proceed going forward - do you plan to revert or 
something else?

thanks

gene