| From 7dd92c94c2f6617da6f2d0a14fe9f4fde3106913 Mon Sep 17 00:00:00 2001 |
| From: Sasha Levin <sashal@kernel.org> |
| Date: Thu, 6 Feb 2020 13:17:25 -0700 |
| Subject: nvme/pci: Add sleep quirk for Samsung and Toshiba drives |
| |
| 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 |
| |