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authorShyjumon N <shyjumon.n@intel.com>2020-02-06 13:17:25 -0700
committerKeith Busch <kbusch@kernel.org>2020-02-20 00:29:39 +0900
commit1fae37accfc5872af3905d4ba71dc6ab15829be7 (patch)
tree3b07c0c23e6c127ee527f984a3c038bacf2577dc
parentf25372ffc3f6c2684b57fb718219137e6ee2b64c (diff)
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>
-rw-r--r--drivers/nvme/host/pci.c12
1 files changed, 12 insertions, 0 deletions
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;