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

Orabug: 15929836
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: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
(cherry picked from commit d70e551c8e1ecb6f20422f8db6bfe6a0049edcb8)

Signed-off-by: Joe Jin <joe.jin@oracle.com>

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 600ede0c0720d223785e25b2f9690443fe0e2490..466824fb0ff58298b1a9b239f25c0ac2007f968b 100644 (file)
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -4070,6 +4070,7 @@ 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 },