[AMD Public Use]
From: Greg KH gregkh@linuxfoundation.org Sent: Wednesday, April 14, 2021 3:49 PM To: Liang, Prike Prike.Liang@amd.com Cc: linux-nvme@lists.infradead.org; kbusch@kernel.org; Chaitanya.Kulkarni@wdc.com; hch@infradead.org; S-k, Shyam-sundar Shyam-sundar.S-k@amd.com; Deucher, Alexander Alexander.Deucher@amd.com; # 5 . 11+ stable@vger.kernel.org Subject: Re: [PATCH 2/2] nvme-pci: add AMD PCIe quirk for suspend/resume
On Wed, Apr 14, 2021 at 07:13:15AM +0000, Liang, Prike wrote:
[AMD Public Use]
From: Greg KH gregkh@linuxfoundation.org Sent: Wednesday, April 14, 2021 2:40 PM To: Liang, Prike Prike.Liang@amd.com Cc: linux-nvme@lists.infradead.org; kbusch@kernel.org; Chaitanya.Kulkarni@wdc.com; hch@infradead.org; S-k, Shyam-sundar Shyam-sundar.S-k@amd.com; Deucher, Alexander Alexander.Deucher@amd.com; # 5 . 11+ stable@vger.kernel.org Subject: Re: [PATCH 2/2] nvme-pci: add AMD PCIe quirk for suspend/resume
On Wed, Apr 14, 2021 at 02:20:00PM +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 setting to resume from RTD3 for s2idle.
Update the nvme_acpi_storage_d3() _with previously added quirk.
Signed-off-by: Chaitanya Kulkarni chaitanya.kulkarni@wdc.com [ck: split patches for nvme and pcie] Signed-off-by: Prike Liang Prike.Liang@amd.com Signed-off-by: Shyam Sundar S K Shyam-sundar.S-k@amd.com Reviewed-by: Chaitanya Kulkarni chaitanya.kulkarni@wdc.com Cc: stable@vger.kernel.org # 5.11+
drivers/nvme/host/pci.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 6bad4d4..5a9a192 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -2832,6 +2832,7 @@ static bool nvme_acpi_storage_d3(struct pci_dev *dev) { struct acpi_device *adev; struct pci_dev *root; +struct pci_dev *rdev; acpi_handle handle; acpi_status status; u8 val; @@ -2845,6 +2846,10 @@ static bool nvme_acpi_storage_d3(struct
pci_dev *dev)
if (!root) return false;
+rdev = pci_get_domain_bus_and_slot(0, 0, PCI_DEVFN(0, 0)); if +(rdev && (rdev->dev_flags &
PCI_DEV_FLAGS_AMD_NVME_SIMPLE_SUSPEND))
+return NVME_QUIRK_SIMPLE_SUSPEND;
adev = ACPI_COMPANION(&root->dev); if (!adev) return false;
2.7.4
This is still broken, why resend it?
Sorry can't get how come the reference count leaked, could you help give
more detail about this.
Please read the documentation for the call you are making here. For once, it is actually written down what needs to be done :)
Thanks, get it now and will update the patch.