diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index ff644a5..097d6e9 100644
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -673,8 +673,13 @@
 			mask &= 0x07;
 		break;
 	case XFER_MW_DMA_0:
-		if (id->field_valid & 2)
-			mask = id->dma_mword & hwif->mwdma_mask;
+		if ((id->field_valid & 2) == 0)
+			break;
+		if (hwif->mdma_filter)
+			mask = hwif->mdma_filter(drive);
+		else
+			mask = hwif->mwdma_mask;
+		mask &= id->dma_mword;
 		break;
 	case XFER_SW_DMA_0:
 		if (id->field_valid & 2) {