From: Shyjumon N <shyjumon.n@intel.com>
Date: Thu, 6 Feb 2020 13:17:25 -0700
Subject: [PATCH] nvme/pci: Add sleep quirk for Samsung and Toshiba drives
Git-commit: 1fae37accfc5872af3905d4ba71dc6ab15829be7
Patch-mainline: v5.6-rc3
References: bsc#1169045
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>
Acked-by: Hannes Reinecke <hare@suse.com>
---
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 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;
--
2.16.4