[PATCH net-next v3 RESEND 1/4] octeon_ep: add padding for small packets

[Shinas Rasheed]

Pad small packets to ETH_ZLEN before transmit, as hardware
cannot pad and requires software padding to ensure
minimum ethernet frame length.

Signed-off-by: Shinas Rasheed <srasheed@xxxxxxxxxxx>
---
V3:
  - Updated changelog to provide more info.
V2: https://lore.kernel.org/all/20231024145119.2366588-2-srasheed@xxxxxxxxxxx/
  - Introduced the patch

 drivers/net/ethernet/marvell/octeon_ep/octep_main.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
index 552970c7dec0..2c86b911a380 100644
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
@@ -820,6 +820,9 @@ static netdev_tx_t octep_start_xmit(struct sk_buff *skb,
 	u16 nr_frags, si;
 	u16 q_no, wi;
 
+	if (skb_put_padto(skb, ETH_ZLEN))
+		return NETDEV_TX_OK;
+
 	q_no = skb_get_queue_mapping(skb);
 	if (q_no >= oct->num_iqs) {
 		netdev_err(netdev, "Invalid Tx skb->queue_mapping=%d\n", q_no);
-- 
2.25.1