3.16.83-rc1 review patch. If anyone has any objections, please let me know.
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From: Mao Wenan maowenan@huawei.com
commit 6e1cdedcf0362fed3aedfe051d46bd7ee2a85fe1 upstream.
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: d9fb9f384292 ("*sonic/natsemi/ns83829: Move the National Semi-conductor drivers") Signed-off-by: Mao Wenan maowenan@huawei.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Ben Hutchings ben@decadent.org.uk --- drivers/net/ethernet/natsemi/sonic.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/net/ethernet/natsemi/sonic.c +++ b/drivers/net/ethernet/natsemi/sonic.c @@ -221,9 +221,9 @@ static int sonic_send_packet(struct sk_b
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); dev_kfree_skb(skb); - return NETDEV_TX_BUSY; + return NETDEV_TX_OK; }
sonic_tda_put(dev, entry, SONIC_TD_STATUS, 0); /* clear status */