Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.5 043/189] nvme/pci: Add sleep quirk for Samsung and Toshiba drives | Date | Tue, 10 Mar 2020 13:38:00 +0100 |
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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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