--- drivers/ata/sata_sil24.c.orig	2017-01-09 08:32:38.000000000 +0100
+++ drivers/ata/sata_sil24.c	2017-01-13 23:44:58.378675018 +0100
@@ -1313,15 +1313,4 @@
 
 	/* configure and activate the device */
-	if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
-		rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
-		if (rc) {
-			rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
-			if (rc) {
-				dev_err(&pdev->dev,
-					"64-bit DMA enable failed\n");
-				return rc;
-			}
-		}
-	} else {
 		rc = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
 		if (rc) {
@@ -1335,5 +1324,4 @@
 			return rc;
 		}
-	}
 
 	/* Set max read request size to 4096.  This slightly increases