nvme/pci: Add sleep quirk for Samsung and Toshiba drives (1fae37ac) · Commits · 戴 / test

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>

drivers/nvme/host/pci.c

+12 −0

Original line number	Diff line number	Diff line
		@@ -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;

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