[PATCH net-next] net: dnet: remove unused variable 'tx_status 'in dnet_start_xmit()

[Zhang Changzhong]

Fixes the following W=1 kernel build warning(s):

drivers/net/ethernet/dnet.c:510:6: warning:
 variable 'tx_status' set but not used [-Wunused-but-set-variable]
  u32 tx_status, irq_enable;
      ^~~~~~~~~

After commit 4796417417a6 ("dnet: Dave DNET ethernet controller driver
(updated)"), variable 'tx_status' is never used in dnet_start_xmit(),
so removing it to avoid build warning.

Reported-by: Hulk Robot <hul...@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzh...@huawei.com>
---
 drivers/net/ethernet/dnet.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/dnet.c b/drivers/net/ethernet/dnet.c
index 3143df9..7f87b0f 100644
--- a/drivers/net/ethernet/dnet.c
+++ b/drivers/net/ethernet/dnet.c
@@ -507,12 +507,12 @@ static netdev_tx_t dnet_start_xmit(struct sk_buff *skb, 
struct net_device *dev)
 {
 
        struct dnet *bp = netdev_priv(dev);
-       u32 tx_status, irq_enable;
+       u32 irq_enable;
        unsigned int i, tx_cmd, wrsz;
        unsigned long flags;
        unsigned int *bufp;
 
-       tx_status = dnet_readl(bp, TX_STATUS);
+       dnet_readl(bp, TX_STATUS);
 
        pr_debug("start_xmit: len %u head %p data %p\n",
               skb->len, skb->head, skb->data);
@@ -520,7 +520,7 @@ static netdev_tx_t dnet_start_xmit(struct sk_buff *skb, 
struct net_device *dev)
 
        spin_lock_irqsave(&bp->lock, flags);
 
-       tx_status = dnet_readl(bp, TX_STATUS);
+       dnet_readl(bp, TX_STATUS);
 
        bufp = (unsigned int *)(((unsigned long) skb->data) & ~0x3UL);
        wrsz = (u32) skb->len + 3;
@@ -542,7 +542,7 @@ static netdev_tx_t dnet_start_xmit(struct sk_buff *skb, 
struct net_device *dev)
 
        if (dnet_readl(bp, TX_FIFO_WCNT) > DNET_FIFO_TX_DATA_AF_TH) {
                netif_stop_queue(dev);
-               tx_status = dnet_readl(bp, INTR_SRC);
+               dnet_readl(bp, INTR_SRC);
                irq_enable = dnet_readl(bp, INTR_ENB);
                irq_enable |= DNET_INTR_ENB_TX_FIFOAE;
                dnet_writel(bp, irq_enable, INTR_ENB);
-- 
2.9.5