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moxa: fix missing unlock on error in moxart_mac_start_xmit() 

Add the missing unlock before return from function moxart_mac_start_xmit()
in the error handling case.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Wei Yongjun 2013-08-18 16:09:30 +08:00 committed by David S. Miller
parent 2bc9ff01f1
commit 0aa857f83f
1 changed files with 6 additions and 4 deletions
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10
drivers/net/ethernet/moxa/moxart_ether.c
View File

@ -314,6 +314,7 @@ static int moxart_mac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
unsigned int len; unsigned int len;
unsigned int tx_head = priv->tx_head; unsigned int tx_head = priv->tx_head;
u32 txdes1; u32 txdes1;
int ret = NETDEV_TX_BUSY;
desc = priv->tx_desc_base + (TX_REG_DESC_SIZE * tx_head); desc = priv->tx_desc_base + (TX_REG_DESC_SIZE * tx_head);
@ -321,7 +322,7 @@ static int moxart_mac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
if (readl(desc + TX_REG_OFFSET_DESC0) & TX_DESC0_DMA_OWN) { if (readl(desc + TX_REG_OFFSET_DESC0) & TX_DESC0_DMA_OWN) {
net_dbg_ratelimited("no TX space for packet\n"); net_dbg_ratelimited("no TX space for packet\n");
priv->stats.tx_dropped++; priv->stats.tx_dropped++;
return NETDEV_TX_BUSY; goto out_unlock;
} }
len = skb->len > TX_BUF_SIZE ? TX_BUF_SIZE : skb->len; len = skb->len > TX_BUF_SIZE ? TX_BUF_SIZE : skb->len;
@ -330,7 +331,7 @@ static int moxart_mac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
len, DMA_TO_DEVICE); len, DMA_TO_DEVICE);
if (dma_mapping_error(&ndev->dev, priv->tx_mapping[tx_head])) { if (dma_mapping_error(&ndev->dev, priv->tx_mapping[tx_head])) {
netdev_err(ndev, "DMA mapping error\n"); netdev_err(ndev, "DMA mapping error\n");
return NETDEV_TX_BUSY; goto out_unlock;
} }
priv->tx_len[tx_head] = len; priv->tx_len[tx_head] = len;
@ -360,10 +361,11 @@ static int moxart_mac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
priv->tx_head = TX_NEXT(tx_head); priv->tx_head = TX_NEXT(tx_head);
ndev->trans_start = jiffies; ndev->trans_start = jiffies;
ret = NETDEV_TX_OK;
out_unlock:
spin_unlock_irq(&priv->txlock); spin_unlock_irq(&priv->txlock);
return NETDEV_TX_OK; return ret;
} }
static struct net_device_stats *moxart_mac_get_stats(struct net_device *ndev) static struct net_device_stats *moxart_mac_get_stats(struct net_device *ndev)