[PATCH v5 1/2] PCI: add AMD PCIe quirk for nvme shutdown opt

[Keith Busch]

On Fri, Apr 16, 2021 at 02:54:34PM +0800, Prike Liang wrote:
> In the NVMe controller default suspend-resume seems only save/restore the
> NVMe link state by APST opt and the NVMe remains in D0 during this time.
> Then the NVMe device will be shutdown by SMU firmware in the s2idle entry
> and then will lost the NVMe power context during s2idle resume.Finally,
> the NVMe command queue request will be processed abnormally and result
> in access timeout.This issue can be settled by using PCIe power set with
> simple suspend-resume process path instead of APST get/set opt.
> 
> In this patch prepare a PCIe RC bus flag to identify the platform whether
> need the quirk.
> 
> Cc: <stable at vger.kernel.org> # 5.11+
> Signed-off-by: Prike Liang <Prike.Liang at amd.com>
> Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k at amd.com>
> [ck: split patches for nvme and pcie]
> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni at wdc.com>
> Signed-off-by: Keith Busch <kbusch at kernel.org>

Just a "Suggested-by:" from me is fine. I'm glad you were able to
confirm this is successful, so I can add my Ack as well

Acked-by: Keith Busch <kbusch at kernel.org>