diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/libata-core.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index c17df3f22fd..439b6db1380 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -819,7 +819,10 @@ static unsigned int ata_id_xfermask(const u16 *id) } mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; - udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; + + udma_mask = 0; + if (id[ATA_ID_FIELD_VALID] & (1 << 2)) + udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); } |