[libata] MWDMA0 is unsupported on PIIX-like PATA controllers

MWDMA0 timings cannot be met with the PIIX based controller
programming interface.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/ata/pata_rdc.c b/drivers/ata/pata_rdc.c
index c843a1e07c4f..237a24d41a2d 100644
--- a/drivers/ata/pata_rdc.c
+++ b/drivers/ata/pata_rdc.c
@@ -284,7 +284,7 @@ static struct ata_port_info rdc_port_info = {
 
         .flags          = ATA_FLAG_SLAVE_POSS,
         .pio_mask       = ATA_PIO4,
-        .mwdma_mask     = ATA_MWDMA2,
+        .mwdma_mask     = ATA_MWDMA12_ONLY,
         .udma_mask      = ATA_UDMA5,
         .port_ops       = &rdc_pata_ops,
 };