nvme/pci: Add sleep quirk for Samsung and Toshiba drives

The Samsung SSD SM981/PM981 and Toshiba SSD KBG40ZNT256G on the Lenovo
C640 platform experience runtime resume issues when the SSDs are kept in
sleep/suspend mode for long time.

This patch applies the 'Simple Suspend' quirk to these configurations.
With this patch, the issue had not been observed in a 1+ day test.

Reviewed-by: Jon Derrick <jonathan.derrick@intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Shyjumon N <shyjumon.n@intel.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 9c80f9f081496b09c8e17487624dec9008817863..b0434b687b178065bb9ddc80325b69567b2b57d4 100644 (file)
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -2747,6 +2747,18 @@ static unsigned long check_vendor_combination_bug(struct pci_dev *pdev)
                    (dmi_match(DMI_BOARD_NAME, "PRIME B350M-A") ||
                     dmi_match(DMI_BOARD_NAME, "PRIME Z370-A")))
                        return NVME_QUIRK_NO_APST;
+       } else if ((pdev->vendor == 0x144d && (pdev->device == 0xa801 ||
+                   pdev->device == 0xa808 || pdev->device == 0xa809)) ||
+                  (pdev->vendor == 0x1e0f && pdev->device == 0x0001)) {
+               /*
+                * Forcing to use host managed nvme power settings for
+                * lowest idle power with quick resume latency on
+                * Samsung and Toshiba SSDs based on suspend behavior
+                * on Coffee Lake board for LENOVO C640
+                */
+               if ((dmi_match(DMI_BOARD_VENDOR, "LENOVO")) &&
+                    dmi_match(DMI_BOARD_NAME, "LNVNB161216"))
+                       return NVME_QUIRK_SIMPLE_SUSPEND;
        }
 
        return 0;