[Intel-wired-lan] [PATCH v1 iwl-net] igc: fix missing update of skb->tail in igc_xmit_frame()

[Kohei Enju]

igc_xmit_frame() misses updating skb->tail when the packet size is
shorter than the minimum one.
Use skb_put_padto() in alignment with other Intel Ethernet drivers.

Fixes: 0507ef8a0372 ("igc: Add transmit and receive fastpath and interrupt 
handlers")
Signed-off-by: Kohei Enju <ko...@enjuk.jp>
---
 drivers/net/ethernet/intel/igc/igc_main.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/intel/igc/igc_main.c 
b/drivers/net/ethernet/intel/igc/igc_main.c
index 1abbdbebf8a4..7ebeca5333b6 100644
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -1727,11 +1727,8 @@ static netdev_tx_t igc_xmit_frame(struct sk_buff *skb,
        /* The minimum packet size with TCTL.PSP set is 17 so pad the skb
         * in order to meet this minimum size requirement.
         */
-       if (skb->len < 17) {
-               if (skb_padto(skb, 17))
-                       return NETDEV_TX_OK;
-               skb->len = 17;
-       }
+       if (skb_put_padto(skb, 17))
+               return NETDEV_TX_OK;
 
        return igc_xmit_frame_ring(skb, igc_tx_queue_mapping(adapter, skb));
 }
-- 
2.51.0