Commit 467c77d4 authored Mar 11, 2018 by Jarosław Janik Committed by Jens Axboe Mar 26, 2018

nvme-pci: disable APST for Samsung NVMe SSD 960 EVO + ASUS PRIME Z370-A



Yet another "incompatible" Samsung NVMe SSD 960 EVO and Asus motherboard
combination. 960 EVO device disappears from PCIe bus within few minutes
after boot-up when APST is in use and never gets back. Forcing
NVME_QUIRK_NO_APST is the only way to make this drive work with this
particular motherboard. NVME_QUIRK_NO_DEEPEST_PS doesn't work, upgrading
motherboard's BIOS didn't help either.
Since this is a desktop motherboard, the only drawback of not using APST
is increased device temperature.

Signed-off-by: Jarosław Janik <jaroslaw.janik@gmail.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

parent 77d0612d

drivers/nvme/host/pci.c

+5 −2

Original line number	Diff line number	Diff line
		@@ -2467,10 +2467,13 @@ static unsigned long check_vendor_combination_bug(struct pci_dev *pdev)
		} else if (pdev->vendor == 0x144d && pdev->device == 0xa804) {
		/*
		* Samsung SSD 960 EVO drops off the PCIe bus after system
		* suspend on a Ryzen board, ASUS PRIME B350M-A.
		* suspend on a Ryzen board, ASUS PRIME B350M-A, as well as
		* within few minutes after bootup on a Coffee Lake board -
		* ASUS PRIME Z370-A
		*/
		if (dmi_match(DMI_BOARD_VENDOR, "ASUSTeK COMPUTER INC.") &&
		dmi_match(DMI_BOARD_NAME, "PRIME B350M-A"))
		(dmi_match(DMI_BOARD_NAME, "PRIME B350M-A") \|\|
		dmi_match(DMI_BOARD_NAME, "PRIME Z370-A")))
		return NVME_QUIRK_NO_APST;
		}