diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 3cc7096..e04cdc2 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2560,6 +2560,7 @@ int ata_bus_probe(struct ata_port *ap)
          * bus as we may be talking too fast.
          */
         dev->pio_mode = XFER_PIO_0;
+        dev->dma_mode = 0xff;

         /* If the controller has a pio mode setup function
          * then use it to set the chipset to rights. Don't
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index e60437c..bf039b0 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -2657,6 +2657,7 @@ int ata_eh_reset(struct ata_link *link, int classify,
          * bus as we may be talking too fast.
          */
         dev->pio_mode = XFER_PIO_0;
+        dev->dma_mode = 0xff;

         /* If the controller has a pio mode setup function
          * then use it to set the chipset to rights. Don't