[PATCH net 01/11] net: au1000: recycle RX descriptors on allocation failure

[Florian Fainelli <f.fainelli@gmail.com>]

An skb allocation failure retries the same completed descriptor forever
in hard IRQ context. Return the buffer to DMA and advance the ring even
when the packet must be dropped.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 drivers/net/ethernet/amd/au1000_eth.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/amd/au1000_eth.c b/drivers/net/ethernet/amd/au1000_eth.c
index 8682323d693f..cd25248f4e3a 100644
--- a/drivers/net/ethernet/amd/au1000_eth.c
+++ b/drivers/net/ethernet/amd/au1000_eth.c
@@ -788,7 +788,7 @@ static int au1000_rx(struct net_device *dev)
 			skb = netdev_alloc_skb(dev, frmlen + 2);
 			if (!skb) {
 				dev->stats.rx_dropped++;
-				continue;
+				goto next;
 			}
 			skb_reserve(skb, 2);	/* 16 byte IP header align */
 			skb_copy_to_linear_data(skb,
@@ -820,6 +820,7 @@ static int au1000_rx(struct net_device *dev)
 				pr_cont("\n");
 			}
 		}
+next:
 		prxd->buff_stat = lower_32_bits(pDB->dma_addr) | RX_DMA_ENABLE;
 		aup->rx_head = (aup->rx_head + 1) & (NUM_RX_DMA - 1);
 		wmb(); /* drain writebuffer */
-- 
2.53.0