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Message-ID: <aP9Ed1Y1lcayFn7Q@hovoldconsulting.com>
Date: Mon, 27 Oct 2025 11:07:51 +0100
From: Johan Hovold <johan@...nel.org>
To: Bjorn Helgaas <helgaas@...nel.org>
Cc: Manivannan Sadhasivam <mani@...nel.org>, linux-pci@...r.kernel.org,
Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>,
Krzysztof Wilczyński <kwilczynski@...nel.org>,
Frank Li <Frank.li@....com>, Shawn Lin <shawn.lin@...k-chips.com>,
Rob Herring <robh@...nel.org>,
"David E . Box" <david.e.box@...ux.intel.com>,
Kai-Heng Feng <kai.heng.feng@...onical.com>,
"Rafael J . Wysocki" <rafael@...nel.org>,
Heiner Kallweit <hkallweit1@...il.com>,
Chia-Lin Kao <acelan.kao@...onical.com>,
Gustavo Pimentel <Gustavo.Pimentel@...opsys.com>,
Han Jingoo <jingoohan1@...il.com>,
Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
Bartosz Golaszewski <brgl@...ev.pl>, linux-arm-msm@...r.kernel.org,
linux-kernel@...r.kernel.org, Bjorn Helgaas <bhelgaas@...gle.com>
Subject: Re: [PATCH] Revert "PCI: qcom: Remove custom ASPM enablement code"
On Sun, Oct 26, 2025 at 02:37:54PM -0500, Bjorn Helgaas wrote:
> On Sun, Oct 26, 2025 at 08:58:29PM +0530, Manivannan Sadhasivam wrote:
> As far as I know, it's L1SS that has catastrophic effects. I haven't
> seen anything for L0s or L1.
Enabling L0s unconditionally certainly blew up on some Qualcomm
machines. See commit d1997c987814 ("PCI: qcom: Disable ASPM L0s for
sc8280xp, sa8540p and sa8295p").
Johan
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