From: Christoph Hellwig <hch@lst.de>
Date: Mon, 26 Aug 2019 12:57:24 +0200
Subject: [PATCH] sata_sil24: use dma_set_mask_and_coherent
Git-commit: dcc02c19cc06bd7bc1b6db0aa0087a2b6eb05b94
Patch-mainline: v5.4-rc1
References: bsc#1175995,jsc#SLE-15608

Use the dma_set_mask_and_coherent helper to set the DMA mask.  Rely
on the relatively recent change that setting a larger than required
mask will never fail to avoid the need for the boilerplate 32-bit
fallback code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Hannes Reinecke <hare@suse.com>
---
 drivers/ata/sata_sil24.c | 26 ++++----------------------
 1 file changed, 4 insertions(+), 22 deletions(-)

diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index 98aad8206921..7bef82de53ca 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -1301,28 +1301,10 @@ static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 	host->iomap = iomap;
 
 	/* 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) {
-			dev_err(&pdev->dev, "32-bit DMA enable failed\n");
-			return rc;
-		}
-		rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
-		if (rc) {
-			dev_err(&pdev->dev,
-				"32-bit consistent DMA enable failed\n");
-			return rc;
-		}
+	rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+	if (rc) {
+		dev_err(&pdev->dev, "DMA enable failed\n");
+		return rc;
 	}
 
 	/* Set max read request size to 4096.  This slightly increases
-- 
2.16.4