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    Subject[PATCH 5.5 043/189] nvme/pci: Add sleep quirk for Samsung and Toshiba drives
    Date
    From: Shyjumon N <shyjumon.n@intel.com>

    [ Upstream commit 1fae37accfc5872af3905d4ba71dc6ab15829be7 ]

    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>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/nvme/host/pci.c | 12 ++++++++++++
    1 file changed, 12 insertions(+)

    diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
    index bb5e13ad1aff2..ec4165e879163 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;
    --
    2.20.1


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