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staging: et131x: Remove send_hw_lock spinlock

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We don't need to use this lock - the tx path is protected by the
networking subsystem xmit_lock, so we don't also need it in
nic_send_packet().

The other use of this spinlock in et1310_enable_phy_coma() to protect
a low power flag makes no sense, so can just be removed.

Signed-off-by: Mark Einon <mark.einon@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mark Einon 2014-09-14 16:59:00 +01:00 committed by Greg Kroah-Hartman
parent 82d95799d8
commit bacb71edb4
1 changed files with 1 additions and 14 deletions
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15
drivers/staging/et131x/et131x.c
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@ -477,8 +477,6 @@ struct et131x_adapter {
/* Spinlocks */
spinlock_t tcb_send_qlock;
spinlock_t tcb_ready_qlock;
spinlock_t send_hw_lock;
spinlock_t rcv_lock;
/* Packet Filter and look ahead size */
@ -1929,19 +1927,14 @@ static void et131x_init_send(struct et131x_adapter *adapter)
*/
static void et1310_enable_phy_coma(struct et131x_adapter *adapter)
{
unsigned long flags;
u32 pmcsr;
pmcsr = readl(&adapter->regs->global.pm_csr);
u32 pmcsr = readl(&adapter->regs->global.pm_csr);
/* Save the GbE PHY speed and duplex modes. Need to restore this
* when cable is plugged back in
*/
/* Stop sending packets. */
spin_lock_irqsave(&adapter->send_hw_lock, flags);
adapter->flags |= FMP_ADAPTER_LOWER_POWER;
spin_unlock_irqrestore(&adapter->send_hw_lock, flags);
/* Wait for outstanding Receive packets */
et131x_disable_txrx(adapter->netdev);
@ -2621,7 +2614,6 @@ static int nic_send_packet(struct et131x_adapter *adapter, struct tcb *tcb)
struct sk_buff *skb = tcb->skb;
u32 nr_frags = skb_shinfo(skb)->nr_frags + 1;
struct skb_frag_struct *frags = &skb_shinfo(skb)->frags[0];
unsigned long flags;
struct phy_device *phydev = adapter->phydev;
dma_addr_t dma_addr;
struct tx_ring *tx_ring = &adapter->tx_ring;
@ -2717,8 +2709,6 @@ static int nic_send_packet(struct et131x_adapter *adapter, struct tcb *tcb)
tcb->index_start = tx_ring->send_idx;
tcb->stale = 0;
spin_lock_irqsave(&adapter->send_hw_lock, flags);
thiscopy = NUM_DESC_PER_RING_TX - INDEX10(tx_ring->send_idx);
if (thiscopy >= frag) {
@ -2781,8 +2771,6 @@ static int nic_send_packet(struct et131x_adapter *adapter, struct tcb *tcb)
writel(PARM_TX_TIME_INT_DEF * NANO_IN_A_MICRO,
&adapter->regs->global.watchdog_timer);
}
spin_unlock_irqrestore(&adapter->send_hw_lock, flags);
return 0;
}
@ -3553,7 +3541,6 @@ static struct et131x_adapter *et131x_adapter_init(struct net_device *netdev,
/* Initialize spinlocks here */
spin_lock_init(&adapter->tcb_send_qlock);
spin_lock_init(&adapter->tcb_ready_qlock);
spin_lock_init(&adapter->send_hw_lock);
spin_lock_init(&adapter->rcv_lock);
adapter->registry_jumbo_packet = 1514; /* 1514-9216 */