Commit 53997522 authored by Christian Lamparter's avatar Christian Lamparter Committed by Damien Le Moal
Browse files

ata: libata-core: Disable READ LOG DMA EXT for Samsung 840 EVOs 

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: default avatarChristian Lamparter <chunkeey@gmail.com>
Signed-off-by: default avatarDamien Le Moal <damien.lemoal@opensource.wdc.com>
parent 7aa8104a

drivers/ata/libata-core.c

+3 −0
Original line number Diff line number Diff line
@@ -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 |