linux-kernel - [PATCH] dma: plx_dma: switch from 'pci_' to 'dma

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Date:   Fri, 17 Sep 2021 00:18:01 -0700
From:   Qing Wang <wangqing@...o.com>
To:     Logan Gunthorpe <logang@...tatee.com>,
        Vinod Koul <vkoul@...nel.org>, dmaengine@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Qing Wang <wangqing@...o.com>
Subject: [PATCH] dma: plx_dma: switch from 'pci_' to 'dma_' API

The wrappers in include/linux/pci-dma-compat.h should go away.

The patch has been generated with the coccinelle script below.
expression e1, e2;
@@
-    pci_set_dma_mask(e1, e2)
+    dma_set_mask(&e1->dev, e2)

@@
expression e1, e2;
@@
-    pci_set_consistent_dma_mask(e1, e2)
+    dma_set_coherent_mask(&e1->dev, e2)

While at it, some 'dma_set_mask()/dma_set_coherent_mask()' have been
updated to a much less verbose 'dma_set_mask_and_coherent()'.

This type of patches has been going on for a long time, I plan to 
clean it up in the near future. If needed, see post from 
Christoph Hellwig on the kernel-janitors ML:
https://marc.info/?l=kernel-janitors&m=158745678307186&w=4

Signed-off-by: Qing Wang <wangqing@...o.com>
---
 drivers/dma/plx_dma.c | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/drivers/dma/plx_dma.c b/drivers/dma/plx_dma.c
index 1669345..1ffcb5c
--- a/drivers/dma/plx_dma.c
+++ b/drivers/dma/plx_dma.c
@@ -563,15 +563,9 @@ static int plx_dma_probe(struct pci_dev *pdev,
 	if (rc)
 		return rc;
 
-	rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(48));
+	rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(48));
 	if (rc)
-		rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
-	if (rc)
-		return rc;
-
-	rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(48));
-	if (rc)
-		rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
+		rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
 	if (rc)
 		return rc;
 
-- 
2.7.4