net: moxa: pass pdev instead of ndev to DMA functions

BugLink: https://bugs.launchpad.net/bugs/1990564
commit 3a12df22a8f68954a4ba48435c06b3d1791c87c4 upstream.

dma_map_single() calls fail in moxart_mac_setup_desc_ring() and
moxart_mac_start_xmit() which leads to an incessant output of this:

[   16.043925] moxart-ethernet 92000000.mac eth0: DMA mapping error
[   16.050957] moxart-ethernet 92000000.mac eth0: DMA mapping error
[   16.058229] moxart-ethernet 92000000.mac eth0: DMA mapping error

Passing pdev to DMA is a common approach among net drivers.

Fixes: 6c821bd9edc9 ("net: Add MOXA ART SoCs ethernet driver")
Signed-off-by: Sergei Antonov <saproj@gmail.com>
Suggested-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20220812171339.2271788-1-saproj@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>

diff --git a/drivers/net/ethernet/moxa/moxart_ether.c b/drivers/net/ethernet/moxa/moxart_ether.c
index 49def6934cad1bbe8ed5fe1a5146d3bc31d49e36..54a91d2b33b532200b38840c28ba97b6d9dcfec3 100644 (file)
--- a/drivers/net/ethernet/moxa/moxart_ether.c
+++ b/drivers/net/ethernet/moxa/moxart_ether.c
@@ -77,7 +77,7 @@ static void moxart_mac_free_memory(struct net_device *ndev)
        int i;
 
        for (i = 0; i < RX_DESC_NUM; i++)
-               dma_unmap_single(&ndev->dev, priv->rx_mapping[i],
+               dma_unmap_single(&priv->pdev->dev, priv->rx_mapping[i],
                                 priv->rx_buf_size, DMA_FROM_DEVICE);
 
        if (priv->tx_desc_base)
@@ -147,11 +147,11 @@ static void moxart_mac_setup_desc_ring(struct net_device *ndev)
                       desc + RX_REG_OFFSET_DESC1);
 
                priv->rx_buf[i] = priv->rx_buf_base + priv->rx_buf_size * i;
-               priv->rx_mapping[i] = dma_map_single(&ndev->dev,
+               priv->rx_mapping[i] = dma_map_single(&priv->pdev->dev,
                                                     priv->rx_buf[i],
                                                     priv->rx_buf_size,
                                                     DMA_FROM_DEVICE);
-               if (dma_mapping_error(&ndev->dev, priv->rx_mapping[i]))
+               if (dma_mapping_error(&priv->pdev->dev, priv->rx_mapping[i]))
                        netdev_err(ndev, "DMA mapping error\n");
 
                moxart_desc_write(priv->rx_mapping[i],
@@ -240,7 +240,7 @@ static int moxart_rx_poll(struct napi_struct *napi, int budget)
                if (len > RX_BUF_SIZE)
                        len = RX_BUF_SIZE;
 
-               dma_sync_single_for_cpu(&ndev->dev,
+               dma_sync_single_for_cpu(&priv->pdev->dev,
                                        priv->rx_mapping[rx_head],
                                        priv->rx_buf_size, DMA_FROM_DEVICE);
                skb = netdev_alloc_skb_ip_align(ndev, len);
@@ -294,7 +294,7 @@ static void moxart_tx_finished(struct net_device *ndev)
        unsigned int tx_tail = priv->tx_tail;
 
        while (tx_tail != tx_head) {
-               dma_unmap_single(&ndev->dev, priv->tx_mapping[tx_tail],
+               dma_unmap_single(&priv->pdev->dev, priv->tx_mapping[tx_tail],
                                 priv->tx_len[tx_tail], DMA_TO_DEVICE);
 
                ndev->stats.tx_packets++;
@@ -358,9 +358,9 @@ static netdev_tx_t moxart_mac_start_xmit(struct sk_buff *skb,
 
        len = skb->len > TX_BUF_SIZE ? TX_BUF_SIZE : skb->len;
 
-       priv->tx_mapping[tx_head] = dma_map_single(&ndev->dev, skb->data,
+       priv->tx_mapping[tx_head] = dma_map_single(&priv->pdev->dev, skb->data,
                                                   len, DMA_TO_DEVICE);
-       if (dma_mapping_error(&ndev->dev, priv->tx_mapping[tx_head])) {
+       if (dma_mapping_error(&priv->pdev->dev, priv->tx_mapping[tx_head])) {
                netdev_err(ndev, "DMA mapping error\n");
                goto out_unlock;
        }
@@ -379,7 +379,7 @@ static netdev_tx_t moxart_mac_start_xmit(struct sk_buff *skb,
                len = ETH_ZLEN;
        }
 
-       dma_sync_single_for_device(&ndev->dev, priv->tx_mapping[tx_head],
+       dma_sync_single_for_device(&priv->pdev->dev, priv->tx_mapping[tx_head],
                                   priv->tx_buf_size, DMA_TO_DEVICE);
 
        txdes1 = TX_DESC1_LTS | TX_DESC1_FTS | (len & TX_DESC1_BUF_SIZE_MASK);
@@ -493,7 +493,7 @@ static int moxart_mac_probe(struct platform_device *pdev)
        priv->tx_buf_size = TX_BUF_SIZE;
        priv->rx_buf_size = RX_BUF_SIZE;
 
-       priv->tx_desc_base = dma_alloc_coherent(&pdev->dev, TX_REG_DESC_SIZE *
+       priv->tx_desc_base = dma_alloc_coherent(p_dev, TX_REG_DESC_SIZE *
                                                TX_DESC_NUM, &priv->tx_base,
                                                GFP_DMA | GFP_KERNEL);
        if (!priv->tx_desc_base) {
@@ -501,7 +501,7 @@ static int moxart_mac_probe(struct platform_device *pdev)
                goto init_fail;
        }
 
-       priv->rx_desc_base = dma_alloc_coherent(&pdev->dev, RX_REG_DESC_SIZE *
+       priv->rx_desc_base = dma_alloc_coherent(p_dev, RX_REG_DESC_SIZE *
                                                RX_DESC_NUM, &priv->rx_base,
                                                GFP_DMA | GFP_KERNEL);
        if (!priv->rx_desc_base) {