nvme-pci: disable APST on Samsung SSD 960 EVO + ASUS PRIME B350M-A

The NVMe device in question drops off the PCIe bus after system suspend.
I've tried several approaches to workaround this issue, but none of them
works:
- NVME_QUIRK_DELAY_BEFORE_CHK_RDY
- NVME_QUIRK_NO_DEEPEST_PS
- Disable APST before controller shutdown
- Delay between controller shutdown and system suspend
- Explicitly set power state to 0 before controller shutdown

Fortunately it's a desktop, so disable APST won't hurt the battery.

Also, change the quirk function name to reflect it's for vendor
combination quirks.

BugLink: https://bugs.launchpad.net/bugs/1705748
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index a11cfd4..8a15aa5 100644 (file)
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -2428,7 +2428,7 @@ static int nvme_dev_map(struct nvme_dev *dev)
        return -ENODEV;
 }
 
-static unsigned long check_dell_samsung_bug(struct pci_dev *pdev)
+static unsigned long check_vendor_combination_bug(struct pci_dev *pdev)
 {
        if (pdev->vendor == 0x144d && pdev->device == 0xa802) {
                /*
@@ -2443,6 +2443,14 @@ static unsigned long check_dell_samsung_bug(struct pci_dev *pdev)
                    (dmi_match(DMI_PRODUCT_NAME, "XPS 15 9550") ||
                     dmi_match(DMI_PRODUCT_NAME, "Precision 5510")))
                        return NVME_QUIRK_NO_DEEPEST_PS;
+       } else if (pdev->vendor == 0x144d && pdev->device == 0xa804) {
+               /*
+                * Samsung SSD 960 EVO drops off the PCIe bus after system
+                * suspend on a Ryzen board, ASUS PRIME B350M-A.
+                */
+               if (dmi_match(DMI_BOARD_VENDOR, "ASUSTeK COMPUTER INC.") &&
+                   dmi_match(DMI_BOARD_NAME, "PRIME B350M-A"))
+                       return NVME_QUIRK_NO_APST;
        }
 
        return 0;
@@ -2482,7 +2490,7 @@ static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id)
        if (result)
                goto unmap;
 
-       quirks |= check_dell_samsung_bug(pdev);
+       quirks |= check_vendor_combination_bug(pdev);
 
        result = nvme_init_ctrl(&dev->ctrl, &pdev->dev, &nvme_pci_ctrl_ops,
                        quirks);