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authorPrarit Bhargava <prarit@redhat.com>2012-05-08 09:08:02 -0400
committerJeff Garzik <jgarzik@redhat.com>2012-05-22 16:02:14 -0400
commitd70e551c8e1ecb6f20422f8db6bfe6a0049edcb8 (patch)
tree5c563b30ec17293cd52d8a44c90e5951d36e3242 /drivers/ata/libata-core.c
parent47ee9108c1dcca434f479e9e520789d2a2ab7917 (diff)
downloadlinux-linaro-stable-d70e551c8e1ecb6f20422f8db6bfe6a0049edcb8.tar.gz
[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: Prarit Bhargava <prarit@redhat.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata/libata-core.c')
-rw-r--r--drivers/ata/libata-core.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index d31ee557b395..cece3a4d11ea 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -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 },