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Date: Thu, 21 Apr 2022 13:40:02 -0700 (PDT) From: "Kenneth R. Crudup" <kenny@...ix.com> To: Kai-Heng Feng <kai.heng.feng@...onical.com> cc: Bjorn Helgaas <helgaas@...nel.org>, Vidya Sagar <vidyas@...dia.com>, bhelgaas@...gle.com, lorenzo.pieralisi@....com, hkallweit1@...il.com, wangxiongfeng2@...wei.com, mika.westerberg@...ux.intel.com, chris.packham@...iedtelesis.co.nz, yangyicong@...ilicon.com, treding@...dia.com, jonathanh@...dia.com, abhsahu@...dia.com, sagupta@...dia.com, linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org, kthota@...dia.com, mmaddireddy@...dia.com, sagar.tv@...il.com, Ricky Wu <ricky_wu@...ltek.com>, Rajat Jain <rajatja@...gle.com>, Prasad Malisetty <quic_pmaliset@...cinc.com>, Victor Ding <victording@...gle.com>, "Kenneth R. Crudup" <kenny@...ix.com> Subject: Re: [PATCH V1] PCI/ASPM: Save/restore L1SS Capability for suspend/resume On Thu, 21 Apr 2022, Kai-Heng Feng wrote: > I went through the whole discussion again, maybe Kenneth's case is > also the result of pcie_aspm_pm_state_change()? > Since Kenneth is using TLP to switch ASPM between performance and > powersaving/powersupersaving, that means 'aspm_disabled' is false. > Hence the KOXIA NVMe stops working post suspend and Realtek card > reader toggles L1ss post hibernation. > Kenneth, can you please see if removing pcie_aspm_pm_state_change() > from pci_raw_set_power_state() helps? > Anyway, this can be easier to spot if dmesg was attached. Well, I haven't had an issue with resume/return from hibernate for quite some time, and the patch I'd reported a long time ago is now in the Linus' master I've been running. I believe a BIOS change from Dell fixed it up for me. But if you're looking for information in any case, I could still do this and get back to the topic re: the results. -Kenny -- Kenneth R. Crudup / Sr. SW Engineer, Scott County Consulting, Orange County CA
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