From 353e3bd5a7081f23a9f015cbf172ec25b1412b93 Mon Sep 17 00:00:00 2001 From: Florian Westphal Date: Sun, 24 Apr 2016 21:38:10 +0200 Subject: [PATCH] atl1c: remove private tx lock AFAICS this is safe: the lock is only used in the .ndo_start_xmit function and this driver does not set LLTX. Gets rid of TX_LOCKED return value, followup patches will remove it. Cc: Jay Cliburn Cc: Chris Snook Signed-off-by: Florian Westphal Signed-off-by: David S. Miller --- drivers/net/ethernet/atheros/atl1c/atl1c.h | 3 +-- drivers/net/ethernet/atheros/atl1c/atl1c_main.c | 11 ----------- 2 files changed, 1 insertion(+), 13 deletions(-) diff --git a/drivers/net/ethernet/atheros/atl1c/atl1c.h b/drivers/net/ethernet/atheros/atl1c/atl1c.h index b9203d928938..c46b489ce9b4 100644 --- a/drivers/net/ethernet/atheros/atl1c/atl1c.h +++ b/drivers/net/ethernet/atheros/atl1c/atl1c.h @@ -488,7 +488,7 @@ struct atl1c_tpd_ring { dma_addr_t dma; /* descriptor ring physical address */ u16 size; /* descriptor ring length in bytes */ u16 count; /* number of descriptors in the ring */ - u16 next_to_use; /* this is protectd by adapter->tx_lock */ + u16 next_to_use; atomic_t next_to_clean; struct atl1c_buffer *buffer_info; }; @@ -542,7 +542,6 @@ struct atl1c_adapter { u16 link_duplex; spinlock_t mdio_lock; - spinlock_t tx_lock; atomic_t irq_sem; struct work_struct common_task; diff --git a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c index d0084d4d1a9b..a3200ea6d765 100644 --- a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c +++ b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c @@ -821,7 +821,6 @@ static int atl1c_sw_init(struct atl1c_adapter *adapter) atl1c_set_rxbufsize(adapter, adapter->netdev); atomic_set(&adapter->irq_sem, 1); spin_lock_init(&adapter->mdio_lock); - spin_lock_init(&adapter->tx_lock); set_bit(__AT_DOWN, &adapter->flags); return 0; @@ -2206,7 +2205,6 @@ static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb, struct net_device *netdev) { struct atl1c_adapter *adapter = netdev_priv(netdev); - unsigned long flags; u16 tpd_req = 1; struct atl1c_tpd_desc *tpd; enum atl1c_trans_queue type = atl1c_trans_normal; @@ -2217,16 +2215,10 @@ static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb, } tpd_req = atl1c_cal_tpd_req(skb); - if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) { - if (netif_msg_pktdata(adapter)) - dev_info(&adapter->pdev->dev, "tx locked\n"); - return NETDEV_TX_LOCKED; - } if (atl1c_tpd_avail(adapter, type) < tpd_req) { /* no enough descriptor, just stop queue */ netif_stop_queue(netdev); - spin_unlock_irqrestore(&adapter->tx_lock, flags); return NETDEV_TX_BUSY; } @@ -2234,7 +2226,6 @@ static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb, /* do TSO and check sum */ if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) { - spin_unlock_irqrestore(&adapter->tx_lock, flags); dev_kfree_skb_any(skb); return NETDEV_TX_OK; } @@ -2257,12 +2248,10 @@ static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb, "tx-skb droppted due to dma error\n"); /* roll back tpd/buffer */ atl1c_tx_rollback(adapter, tpd, type); - spin_unlock_irqrestore(&adapter->tx_lock, flags); dev_kfree_skb_any(skb); } else { netdev_sent_queue(adapter->netdev, skb->len); atl1c_tx_queue(adapter, skb, tpd, type); - spin_unlock_irqrestore(&adapter->tx_lock, flags); } return NETDEV_TX_OK;