From: Yunsheng Lin linyunsheng@huawei.com
[ Upstream commit 36c67349a1a1c88b9cf11d7ca7762ababdb38867 ]
The hardware can not handle short frames below or equal to 32 bytes according to the hardware user manual, and it will trigger a RAS error when the frame's length is below 33 bytes.
This patch pads the SKB when skb->len is below 33 bytes before sending it to hardware.
Fixes: 76ad4f0ee747 ("net: hns3: Add support of HNS3 Ethernet Driver for hip08 SoC") Signed-off-by: Yunsheng Lin linyunsheng@huawei.com Signed-off-by: Huazhong Tan tanhuazhong@huawei.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c index 84d8816c8681b..0c8d2269bc46e 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c @@ -54,6 +54,8 @@ MODULE_PARM_DESC(debug, " Network interface message level setting"); #define HNS3_INNER_VLAN_TAG 1 #define HNS3_OUTER_VLAN_TAG 2
+#define HNS3_MIN_TX_LEN 33U + /* hns3_pci_tbl - PCI Device ID Table * * Last entry must be all 0s @@ -1329,6 +1331,10 @@ netdev_tx_t hns3_nic_net_xmit(struct sk_buff *skb, struct net_device *netdev) int ret; int i;
+ /* Hardware can only handle short frames above 32 bytes */ + if (skb_put_padto(skb, HNS3_MIN_TX_LEN)) + return NETDEV_TX_OK; + /* Prefetch the data used later */ prefetch(skb->data);