linux-kernel - [PATCH net] macmace: Set platform device coherent_dma

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Message-Id: <S1751901AbeECEYC/20180503042404Z+257@vger.kernel.org>
Date:   Thu, 03 May 2018 14:23:55 +1000
From:   Finn Thain <fthain@...egraphics.com.au>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     linux-m68k@...ts.linux-m68k.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH net] macmace: Set platform device coherent_dma_mask

Set the device's coherent_dma_mask to avoid a WARNING splat.
Please see commit 205e1b7f51e4 ("dma-mapping: warn when there is
no coherent_dma_mask").

Cc: linux-m68k@...ts.linux-m68k.org
Tested-by: Stan Johnson <userm57@...oo.com>
Signed-off-by: Finn Thain <fthain@...egraphics.com.au>
---
 drivers/net/ethernet/apple/macmace.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/apple/macmace.c b/drivers/net/ethernet/apple/macmace.c
index 137cbb470af2..98292c49ecf0 100644
--- a/drivers/net/ethernet/apple/macmace.c
+++ b/drivers/net/ethernet/apple/macmace.c
@@ -203,6 +203,10 @@ static int mace_probe(struct platform_device *pdev)
 	unsigned char checksum = 0;
 	int err;
 
+	err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+	if (err)
+		return err;
+
 	dev = alloc_etherdev(PRIV_BYTES);
 	if (!dev)
 		return -ENOMEM;
-- 
2.16.1