linux-kernel - Re: [PATCH] nvme-pci: Use NVME_QUIRK_SIMPLE_SUSPEND for Qualcomm Snapdragon 8cx Gen 3 platforms

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Message-ID: <20250213071043.GA21238@lst.de>
Date: Thu, 13 Feb 2025 08:10:43 +0100
From: Christoph Hellwig <hch@....de>
To: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc: Christoph Hellwig <hch@....de>, Bjorn Helgaas <helgaas@...nel.org>,
	kbusch@...nel.org, axboe@...nel.dk, sagi@...mberg.me,
	linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org,
	andersson@...nel.org, konradybcio@...nel.org, rafael@...nel.org,
	ulf.hansson@...aro.org
Subject: Re: [PATCH] nvme-pci: Use NVME_QUIRK_SIMPLE_SUSPEND for Qualcomm
 Snapdragon 8cx Gen 3 platforms

On Mon, Feb 10, 2025 at 12:06:05PM +0530, Manivannan Sadhasivam wrote:
> Multiple times? As I stated in the commit message, this quirk is *not* going to
> be extended for any Qcom platforms as the rest of them can retain the PCIe power
> state during CX Power Collapse.
> 
> And we don't need this quirk in any other endpoint drivers as this chipset is
> mostly used in Laptop form factors and only the NVMe driver is found to be
> causing the issues. Rest of the endpoint drivers (WLAN, Modem) are all coping
> with PCIe power going down during system suspend.

No matter where you need it - the place is the core and not the driver.