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From:   Christoph Hellwig <hch@lst.de>
To:     Mauro Carvalho Chehab <mchehab@kernel.org>,
        Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
        "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>,
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        Seung-Woo Kim <sw0312.kim@samsung.com>,
        Ben Skeggs <bskeggs@redhat.com>,
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        Tomasz Figa <tfiga@chromium.org>,
        Matt Porter <mporter@kernel.crashing.org>,
        iommu@lists.linux-foundation.org
Cc:     Stefan Richter <stefanr@s5r6.in-berlin.de>,
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Subject: [PATCH 05/17] net/au1000-eth: stop using DMA_ATTR_NON_CONSISTENT
Date:   Mon, 14 Sep 2020 16:44:21 +0200
Message-Id: <20200914144433.1622958-6-hch@lst.de>
In-Reply-To: <20200914144433.1622958-1-hch@lst.de>
References: <20200914144433.1622958-1-hch@lst.de>
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Sender: linux-kernel-owner@vger.kernel.org
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The au1000-eth driver contains none of the manual cache synchronization
required for using DMA_ATTR_NON_CONSISTENT.  From what I can tell it
can be used on both dma coherent and non-coherent DMA platforms, but
I suspect it has been buggy on the non-coherent platforms all along.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/net/ethernet/amd/au1000_eth.c | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ethernet/amd/au1000_eth.c b/drivers/net/ethernet/amd/au1000_eth.c
index 75dbd221dc594b..19e195420e2434 100644
--- a/drivers/net/ethernet/amd/au1000_eth.c
+++ b/drivers/net/ethernet/amd/au1000_eth.c
@@ -1131,10 +1131,9 @@ static int au1000_probe(struct platform_device *pdev)
 	/* Allocate the data buffers
 	 * Snooping works fine with eth on all au1xxx
 	 */
-	aup->vaddr = (u32)dma_alloc_attrs(&pdev->dev, MAX_BUF_SIZE *
+	aup->vaddr = (u32)dma_alloc_coherent(&pdev->dev, MAX_BUF_SIZE *
 					  (NUM_TX_BUFFS + NUM_RX_BUFFS),
-					  &aup->dma_addr, 0,
-					  DMA_ATTR_NON_CONSISTENT);
+					  &aup->dma_addr, 0);
 	if (!aup->vaddr) {
 		dev_err(&pdev->dev, "failed to allocate data buffers\n");
 		err = -ENOMEM;
@@ -1310,9 +1309,8 @@ static int au1000_probe(struct platform_device *pdev)
 err_remap2:
 	iounmap(aup->mac);
 err_remap1:
-	dma_free_attrs(&pdev->dev, MAX_BUF_SIZE * (NUM_TX_BUFFS + NUM_RX_BUFFS),
-			(void *)aup->vaddr, aup->dma_addr,
-			DMA_ATTR_NON_CONSISTENT);
+	dma_free_coherent(&pdev->dev, MAX_BUF_SIZE * (NUM_TX_BUFFS + NUM_RX_BUFFS),
+			(void *)aup->vaddr, aup->dma_addr);
 err_vaddr:
 	free_netdev(dev);
 err_alloc:
@@ -1344,9 +1342,8 @@ static int au1000_remove(struct platform_device *pdev)
 		if (aup->tx_db_inuse[i])
 			au1000_ReleaseDB(aup, aup->tx_db_inuse[i]);
 
-	dma_free_attrs(&pdev->dev, MAX_BUF_SIZE * (NUM_TX_BUFFS + NUM_RX_BUFFS),
-			(void *)aup->vaddr, aup->dma_addr,
-			DMA_ATTR_NON_CONSISTENT);
+	dma_free_coherent(&pdev->dev, MAX_BUF_SIZE * (NUM_TX_BUFFS + NUM_RX_BUFFS),
+			(void *)aup->vaddr, aup->dma_addr);
 
 	iounmap(aup->macdma);
 	iounmap(aup->mac);
-- 
2.28.0