Commit 6e1cdedc authored by Mao Wenan's avatar Mao Wenan Committed by David S. Miller
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net: sonic: return NETDEV_TX_OK if failed to map buffer

NETDEV_TX_BUSY really should only be used by drivers that call
netif_tx_stop_queue() at the wrong moment. If dma_map_single() is
failed to map tx DMA buffer, it might trigger an infinite loop.
This patch use NETDEV_TX_OK instead of NETDEV_TX_BUSY, and change
printk to pr_err_ratelimited.

Fixes: d9fb9f38

 ("*sonic/natsemi/ns83829: Move the National Semi-conductor drivers")
Signed-off-by: default avatarMao Wenan <>
Signed-off-by: default avatarDavid S. Miller <>
parent 7bdf4de1
......@@ -232,9 +232,9 @@ static int sonic_send_packet(struct sk_buff *skb, struct net_device *dev)
laddr = dma_map_single(lp->device, skb->data, length, DMA_TO_DEVICE);
if (!laddr) {
printk(KERN_ERR "%s: failed to map tx DMA buffer.\n", dev->name);
pr_err_ratelimited("%s: failed to map tx DMA buffer.\n", dev->name);
return NETDEV_TX_OK;
sonic_tda_put(dev, entry, SONIC_TD_STATUS, 0); /* clear status */
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