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SubjectRe: [PATCH v2 0/3] PCI: Notify PCI drivers about powerdown during suspend
On Wed, May 18, 2022 at 3:19 PM Manivannan Sadhasivam
<manivannan.sadhasivam@linaro.org> wrote:
>
> Hi,
>
> This series adds support for notifying the PCI drivers like NVMe about the
> transition of PCI devices into powerdown mode during system suspend.

What kind of system suspend are you referring to? Suspend-to-idle or
suspend-to-RAM?

For suspend-to-RAM this series should not be necessary at all, because
drivers cannot assume that the state of devices will be preserved
anyway in this case.

For suspend-to-idle, drivers can expect the preservation of the device
state, so perhaps the firmware should be prevented from powering them
off in the suspend-to-idle path instead.

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