From 1fae37accfc5872af3905d4ba71dc6ab15829be7 Mon Sep 17 00:00:00 2001 From: Shyjumon N Date: Thu, 6 Feb 2020 13:17:25 -0700 Subject: 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 Reviewed-by: Christoph Hellwig Signed-off-by: Shyjumon N Signed-off-by: Keith Busch --- drivers/nvme/host/pci.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'drivers') diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 9c80f9f08149..b0434b687b17 100644 --- 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; -- cgit