linux-kernel - [PATCH net-next] net: systemport: Set correct DMA mask

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Date:   Tue, 17 Dec 2019 16:29:50 -0800
From:   Florian Fainelli <f.fainelli@...il.com>
To:     netdev@...r.kernel.org
Cc:     jakub.kicinski@...ronome.com,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        bcm-kernel-feedback-list@...adcom.com (open list:BROADCOM SYSTEMPORT
        ETHERNET DRIVER), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH net-next] net: systemport: Set correct DMA mask

SYSTEMPORT is capabable of doing up to 40-bit of physical addresses, set
an appropriate DMA mask to permit that.

Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
---
 drivers/net/ethernet/broadcom/bcmsysport.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/net/ethernet/broadcom/bcmsysport.c b/drivers/net/ethernet/broadcom/bcmsysport.c
index 8e3152779a61..1907e47fd0af 100644
--- a/drivers/net/ethernet/broadcom/bcmsysport.c
+++ b/drivers/net/ethernet/broadcom/bcmsysport.c
@@ -2427,6 +2427,14 @@ static int bcm_sysport_probe(struct platform_device *pdev)
 	if (!of_id || !of_id->data)
 		return -EINVAL;
 
+	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40));
+	if (ret)
+		ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+	if (ret) {
+		dev_err(&pdev->dev, "unable to set DMA mask: %d\n", ret);
+		return ret;
+	}
+
 	/* Fairly quickly we need to know the type of adapter we have */
 	params = of_id->data;
 
-- 
2.17.1