From 71803c1dfa29e0d13b99e48fda11107cc8caebc7 Mon Sep 17 00:00:00 2001 From: Johan Jonker Date: Mon, 4 Nov 2024 21:01:38 +0800 Subject: net: arc: fix the device for dma_map_single/dma_unmap_single The ndev->dev and pdev->dev aren't the same device, use ndev->dev.parent which has dma_mask, ndev->dev.parent is just pdev->dev. Or it would cause the following issue: [ 39.933526] ------------[ cut here ]------------ [ 39.938414] WARNING: CPU: 1 PID: 501 at kernel/dma/mapping.c:149 dma_map_page_attrs+0x90/0x1f8 Fixes: f959dcd6ddfd ("dma-direct: Fix potential NULL pointer dereference") Signed-off-by: David Wu Signed-off-by: Johan Jonker Signed-off-by: Andy Yan Signed-off-by: Paolo Abeni --- drivers/net/ethernet/arc/emac_main.c | 27 ++++++++++++++++----------- 1 file changed, 16 insertions(+), 11 deletions(-) (limited to 'drivers/net/ethernet/arc/emac_main.c') diff --git a/drivers/net/ethernet/arc/emac_main.c b/drivers/net/ethernet/arc/emac_main.c index 31ee477dd131..8283aeee35fb 100644 --- a/drivers/net/ethernet/arc/emac_main.c +++ b/drivers/net/ethernet/arc/emac_main.c @@ -111,6 +111,7 @@ static void arc_emac_tx_clean(struct net_device *ndev) { struct arc_emac_priv *priv = netdev_priv(ndev); struct net_device_stats *stats = &ndev->stats; + struct device *dev = ndev->dev.parent; unsigned int i; for (i = 0; i < TX_BD_NUM; i++) { @@ -140,7 +141,7 @@ static void arc_emac_tx_clean(struct net_device *ndev) stats->tx_bytes += skb->len; } - dma_unmap_single(&ndev->dev, dma_unmap_addr(tx_buff, addr), + dma_unmap_single(dev, dma_unmap_addr(tx_buff, addr), dma_unmap_len(tx_buff, len), DMA_TO_DEVICE); /* return the sk_buff to system */ @@ -174,6 +175,7 @@ static void arc_emac_tx_clean(struct net_device *ndev) static int arc_emac_rx(struct net_device *ndev, int budget) { struct arc_emac_priv *priv = netdev_priv(ndev); + struct device *dev = ndev->dev.parent; unsigned int work_done; for (work_done = 0; work_done < budget; work_done++) { @@ -223,9 +225,9 @@ static int arc_emac_rx(struct net_device *ndev, int budget) continue; } - addr = dma_map_single(&ndev->dev, (void *)skb->data, + addr = dma_map_single(dev, (void *)skb->data, EMAC_BUFFER_SIZE, DMA_FROM_DEVICE); - if (dma_mapping_error(&ndev->dev, addr)) { + if (dma_mapping_error(dev, addr)) { if (net_ratelimit()) netdev_err(ndev, "cannot map dma buffer\n"); dev_kfree_skb(skb); @@ -237,7 +239,7 @@ static int arc_emac_rx(struct net_device *ndev, int budget) } /* unmap previosly mapped skb */ - dma_unmap_single(&ndev->dev, dma_unmap_addr(rx_buff, addr), + dma_unmap_single(dev, dma_unmap_addr(rx_buff, addr), dma_unmap_len(rx_buff, len), DMA_FROM_DEVICE); pktlen = info & LEN_MASK; @@ -423,6 +425,7 @@ static int arc_emac_open(struct net_device *ndev) { struct arc_emac_priv *priv = netdev_priv(ndev); struct phy_device *phy_dev = ndev->phydev; + struct device *dev = ndev->dev.parent; int i; phy_dev->autoneg = AUTONEG_ENABLE; @@ -445,9 +448,9 @@ static int arc_emac_open(struct net_device *ndev) if (unlikely(!rx_buff->skb)) return -ENOMEM; - addr = dma_map_single(&ndev->dev, (void *)rx_buff->skb->data, + addr = dma_map_single(dev, (void *)rx_buff->skb->data, EMAC_BUFFER_SIZE, DMA_FROM_DEVICE); - if (dma_mapping_error(&ndev->dev, addr)) { + if (dma_mapping_error(dev, addr)) { netdev_err(ndev, "cannot dma map\n"); dev_kfree_skb(rx_buff->skb); return -ENOMEM; @@ -548,6 +551,7 @@ static void arc_emac_set_rx_mode(struct net_device *ndev) static void arc_free_tx_queue(struct net_device *ndev) { struct arc_emac_priv *priv = netdev_priv(ndev); + struct device *dev = ndev->dev.parent; unsigned int i; for (i = 0; i < TX_BD_NUM; i++) { @@ -555,7 +559,7 @@ static void arc_free_tx_queue(struct net_device *ndev) struct buffer_state *tx_buff = &priv->tx_buff[i]; if (tx_buff->skb) { - dma_unmap_single(&ndev->dev, + dma_unmap_single(dev, dma_unmap_addr(tx_buff, addr), dma_unmap_len(tx_buff, len), DMA_TO_DEVICE); @@ -579,6 +583,7 @@ static void arc_free_tx_queue(struct net_device *ndev) static void arc_free_rx_queue(struct net_device *ndev) { struct arc_emac_priv *priv = netdev_priv(ndev); + struct device *dev = ndev->dev.parent; unsigned int i; for (i = 0; i < RX_BD_NUM; i++) { @@ -586,7 +591,7 @@ static void arc_free_rx_queue(struct net_device *ndev) struct buffer_state *rx_buff = &priv->rx_buff[i]; if (rx_buff->skb) { - dma_unmap_single(&ndev->dev, + dma_unmap_single(dev, dma_unmap_addr(rx_buff, addr), dma_unmap_len(rx_buff, len), DMA_FROM_DEVICE); @@ -679,6 +684,7 @@ static netdev_tx_t arc_emac_tx(struct sk_buff *skb, struct net_device *ndev) unsigned int len, *txbd_curr = &priv->txbd_curr; struct net_device_stats *stats = &ndev->stats; __le32 *info = &priv->txbd[*txbd_curr].info; + struct device *dev = ndev->dev.parent; dma_addr_t addr; if (skb_padto(skb, ETH_ZLEN)) @@ -692,10 +698,9 @@ static netdev_tx_t arc_emac_tx(struct sk_buff *skb, struct net_device *ndev) return NETDEV_TX_BUSY; } - addr = dma_map_single(&ndev->dev, (void *)skb->data, len, - DMA_TO_DEVICE); + addr = dma_map_single(dev, (void *)skb->data, len, DMA_TO_DEVICE); - if (unlikely(dma_mapping_error(&ndev->dev, addr))) { + if (unlikely(dma_mapping_error(dev, addr))) { stats->tx_dropped++; stats->tx_errors++; dev_kfree_skb_any(skb); -- cgit v1.2.3-70-g09d2