linux-kernel - Re: [PATCH] nvme-pci: Force NVME_QUIRK_SIMPLE

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Message-ID: <ZxvDZVKtM9qGYBP_@kbusch-mbp.dhcp.thefacebook.com>
Date: Fri, 25 Oct 2024 10:12:21 -0600
From: Keith Busch <kbusch@...nel.org>
To: Konrad Dybcio <konradybcio@...nel.org>
Cc: Jens Axboe <axboe@...nel.dk>, Christoph Hellwig <hch@....de>,
	Sagi Grimberg <sagi@...mberg.me>,
	Bjorn Andersson <bjorn.andersson@....qualcomm.com>,
	Marijn Suijten <marijn.suijten@...ainline.org>,
	linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Subject: Re: [PATCH] nvme-pci: Force NVME_QUIRK_SIMPLE_SUSPEND on Qualcomm
 hosts

On Thu, Oct 24, 2024 at 07:33:07PM +0200, Konrad Dybcio wrote:
> From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
> 
> The Qualcomm SC8280XP SoC requires that all PCIe hosts are powered down
> before the platform can reach S3-like sleep states. This is very much
> similar in nature to the issue described in [1].

The "SIMPLE" quirk is only supposed to affect kernel managed runtime
suspend states, s2idle or s0ix. Shouldn't s3 already be using the simple
suspend?