This is a note to let you know that I've just added the patch titled ata: libata-core: Disable READ LOG DMA EXT for Samsung 840 EVOs to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: ata-libata-core-disable-read-log-dma-ext-for-samsung.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 3ea2382b6124e9551ce2e65fb9c0d3226954a627 Author: Christian Lamparter <chunkeey@xxxxxxxxx> Date: Sat Mar 19 21:11:03 2022 +0100 ata: libata-core: Disable READ LOG DMA EXT for Samsung 840 EVOs [ Upstream commit 5399752299396a3c9df6617f4b3c907d7aa4ded8 ] 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. The reporter "Tice Rex" which has the unique opportunity that he has two Samsung 840 EVO SSD! One with the older firmware "EXT0BB0Q" which booted fine and didn't expose "READ LOG DMA EXT". But the newer/latest firmware "EXT0DB6Q" caused the headaches. BugLink: https://github.com/openwrt/openwrt/issues/9505 Signed-off-by: Christian Lamparter <chunkeey@xxxxxxxxx> Signed-off-by: Damien Le Moal <damien.lemoal@xxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 791374199e22..d3a7b3bb5043 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -4588,6 +4588,9 @@ 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 |