Commit d70e551c authored by Prarit Bhargava's avatar Prarit Bhargava Committed by Jeff Garzik

[libata] Add " 2GB ATA Flash Disk"/"ADMA428M" to DMA blacklist

A user has several systems with a couple of models of flash disks with IDE
connectors.  These disks work fine in 2.6.18-ish kernels but corrupt data on
new kernels.

The difference appears to be with the default I/O method used by the IDE
controller driver between the kernels.  In the older kernels, the
configuration is very conservative and the driver stays in PIO mode.  With
new kernels, the ata driver (pata_serverworks) attempts to use UDMA/66
which the drive claims to support.  This mode, however, does not appear to
work in DMA mode.  The drive does work correctly and no corruption is
seen if the kernel parameter "libata.force=5:pio0,6:pio0" is used to force
the driver to use PIO instead of DMA mode.

Blacklist these drives.  Unfortunately the model name of the drive is very
generic, " 2GB ATA Flash Disk", but the revision is specific, "ADMA428M".
Signed-off-by: default avatarPrarit Bhargava <prarit@redhat.com>
Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
parent 47ee9108
......@@ -4057,6 +4057,7 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
{ "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
{ "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
{ "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
{ "2GB ATA Flash Disk", "ADMA428M", ATA_HORKAGE_NODMA },
/* Odd clown on sil3726/4726 PMPs */
{ "Config Disk", NULL, ATA_HORKAGE_DISABLE },
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment