1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index de33e6f88f17..ada2a3ea9430 100644
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -731,10 +731,12 @@ static unsigned int ide_get_mode_mask(ide_drive_t *drive, u8 base)
                         mask &= 0x07;
                 break;
         case XFER_MW_DMA_0:
-                mask = id->dma_mword & hwif->mwdma_mask;
+                if (id->field_valid & 2)
+                        mask = id->dma_mword & hwif->mwdma_mask;
                 break;
         case XFER_SW_DMA_0:
-                mask = id->dma_1word & hwif->swdma_mask;
+                if (id->field_valid & 2)
+                        mask = id->dma_1word & hwif->swdma_mask;
                 break;
         default:
                 BUG();