Samsung' 840 EVO with the latest firmware (EXT0DB6Q) locks up with the a message: "READ LOG DMA EXT failed, trying PIO" during boot. Initially this was discovered because it caused a crash with the sata_dwc_460ex controller on a WD MyBook Live DUO [1]. The reporter "ticerex" which has the unique opportunity that he has two Samsung 840 EVO SSD! One with the older firmware "EXT0BB0Q" which boots fine. But the newer/latest firmware "EXT0DB6Q" caused the headaches. This failure is not limited to sata_dwc_460ex, it also happens on ahci controllers (Asmedia) as found in this forum unraid thread [2]. (This was with a "Samsung SSD 840 EVO 120GB" with firmware "EXT0BB6Q") [1] <https://forum.openwrt.org/t/my-book-live-duo-reboot-loop/122464/11> [2] <https://forums.unraid.net/topic/77007-disks-not-showing-up/#comment-711295> Cc: <stable@xxxxxxxxxx> # 5.10+ Reported-by: ticerex (OpenWrt Forum) Link: https://forum.openwrt.org/t/my-book-live-duo-reboot-loop/122464 Signed-off-by: Christian Lamparter <chunkeey@xxxxxxxxx> --- "Please use my forum nick." <https://forum.openwrt.org/t/my-book-live-duo-reboot-loop/122464/14> The other patch in this series addresses the drivers crash. Note: This "READ LOG DMA EXT failed" also happens on the newer Samsung 870 EVOs too: <https://bugzilla.kernel.org/show_bug.cgi?id=201693#c29>. I guess there needs to be a database maybe based on the firmware revision? For now I've settled with the "840 EVO" since I have found a old, but updated Samsung 840 EVO 120GB in my spare-parts box that I can test with. --- drivers/ata/libata-core.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 0c854aebfe0b..760c0d81d148 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -4014,6 +4014,9 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = { ATA_HORKAGE_ZERO_AFTER_TRIM, }, { "Crucial_CT*MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM | ATA_HORKAGE_ZERO_AFTER_TRIM, }, + { "Samsung SSD 840 EVO*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | + ATA_HORKAGE_NO_DMA_LOG | + ATA_HORKAGE_ZERO_AFTER_TRIM, }, { "Samsung SSD 840*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | ATA_HORKAGE_ZERO_AFTER_TRIM, }, { "Samsung SSD 850*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | -- 2.35.1
