Many users reported the issue when running the system with Samsung 860, 870 SSD, and AMD chipset. Therefore, completely disabling the NCQ can avoid this issue. Entire disabling NCQ for Samsung 860/870 SSD will cause I/O performance drop. In this case, a flag ATA_HORKAGE_NONCQ_ON_AMD is introduced to used to perform an additional check for these SSDs. If it finds its parent ATA controller is AMD, the NCQ will be disabled. Otherwise, the NCQ is kept to enable. Changes since v3 * Modified the flag from ATA_HORKAGE_NONCQ_ON_ASMEDIA_AMD_MARVELL to ATA_HORKAGE_NONCQ_ON_AMD. * Modified and fixed the code to completely disable NCQ on AMD controller. Kate Hsuan (1): libata: Add ATA_HORKAGE_NONCQ_ON_AMD for Samsung 860 and 870 SSD. drivers/ata/libata-core.c | 24 ++++++++++++++++++++++-- include/linux/libata.h | 1 + 2 files changed, 23 insertions(+), 2 deletions(-) -- 2.31.1
