[PATCH v2] nvme: put some AMD PCIE downstream NVME device to simple suspend/resume path

[Christoph Hellwig]

On Wed, Mar 31, 2021 at 08:48:05PM +0800, Prike Liang wrote:
> The NVME device pluged in some AMD PCIE root port will resume timeout
> from s2idle which caused by NVME power CFG lost in the SMU FW restore.
> This issue can be workaround by using PCIe power set with simple
> suspend/resume process path instead of APST. In the onwards ASIC will
> try do the NVME shutdown save and restore in the BIOS and still need PCIe
> power seting to resume from RTD3 for s2idle.

Looks like this is a generic PCIe-level quirk and should go into the
core drivers/pci/ quirk table, with NVMe just looking at the
quirk flag.