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net: r6040: Utilize skb_put_padto() 

Pad the SKB to the minimum length of ETH_ZLEN by using skb_put_padto()
and take this operation out of the critical section since there is no
need to check any HW resources before doing that.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2016-07-04 14:36:03 -07:00 committed by David S. Miller
parent 7def171ddc
commit a546e557d9
1 changed files with 4 additions and 5 deletions
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9
drivers/net/ethernet/rdc/r6040.c
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@ -815,6 +815,9 @@ static netdev_tx_t r6040_start_xmit(struct sk_buff *skb,
void __iomem *ioaddr = lp->base;
unsigned long flags;
if (skb_put_padto(skb, ETH_ZLEN) < 0)
return NETDEV_TX_OK;
/* Critical Section */
spin_lock_irqsave(&lp->lock, flags);
@ -829,11 +832,7 @@ static netdev_tx_t r6040_start_xmit(struct sk_buff *skb,
/* Set TX descriptor & Transmit it */
lp->tx_free_desc--;
descptr = lp->tx_insert_ptr;
if (skb->len < ETH_ZLEN)
descptr->len = ETH_ZLEN;
else
descptr->len = skb->len;
descptr->len = skb->len;
descptr->skb_ptr = skb;
descptr->buf = cpu_to_le32(pci_map_single(lp->pdev,
skb->data, skb->len, PCI_DMA_TODEVICE));