net: fec: fix improper use of NETDEV_TX_BUSY
[ Upstream commit 06a4df5863f73af193a4ff7abf7cb04058584f06 ]
The ndo_start_xmit() method must not free skb when returning
NETDEV_TX_BUSY, since caller is going to requeue freed skb.
Fix it by returning NETDEV_TX_OK in case of dma_map_single() fails.
Fixes: 79f339125e
("net: fec: Add software TSO support")
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -623,7 +623,7 @@ fec_enet_txq_put_data_tso(struct fec_enet_priv_tx_q *txq, struct sk_buff *skb,
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dev_kfree_skb_any(skb);
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if (net_ratelimit())
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netdev_err(ndev, "Tx DMA memory map failed\n");
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return NETDEV_TX_BUSY;
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return NETDEV_TX_OK;
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}
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bdp->cbd_datlen = cpu_to_fec16(size);
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@ -685,7 +685,7 @@ fec_enet_txq_put_hdr_tso(struct fec_enet_priv_tx_q *txq,
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dev_kfree_skb_any(skb);
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if (net_ratelimit())
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netdev_err(ndev, "Tx DMA memory map failed\n");
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return NETDEV_TX_BUSY;
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return NETDEV_TX_OK;
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}
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}
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