From: Jun He Date: Tue, 21 Jun 2016 03:56:36 +0000 (+0800) Subject: net: hns: fix bug that alloc skb fail lead to port unavailable X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=3a31b64e3e4f37452709d73f2c0b5c433faad3f3;p=linux-beck.git net: hns: fix bug that alloc skb fail lead to port unavailable When hns_nic_poll_rx_skb alloc skb fail, it will break receive cycle and read new fbd_num to start new receive cycle. It recomputes cycle num is fbd_num minus clean_count, actually this cycle num is too big because it drop out receive cycle. It brings about the port unavailable. So we will goto out when alloc skb fail to fix this bug. Signed-off-by: Jun He Signed-off-by: Ding Tianhong Signed-off-by: Yisen Zhuang Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.c b/drivers/net/ethernet/hisilicon/hns/hns_enet.c index f49246dfa40c..c0ce37b1702c 100644 --- a/drivers/net/ethernet/hisilicon/hns/hns_enet.c +++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.c @@ -768,10 +768,10 @@ recv: clean_count = 0; } - /* poll one pkg*/ + /* poll one pkt*/ err = hns_nic_poll_rx_skb(ring_data, &skb, &bnum); if (unlikely(!skb)) /* this fault cannot be repaired */ - break; + goto out; recv_bds += bnum; clean_count += bnum; @@ -797,6 +797,7 @@ recv: } } +out: /* make all data has been write before submit */ if (clean_count > 0) hns_nic_alloc_rx_buffers(ring_data, clean_count);