[PATCH net-next 6/9] e1000e: use pskb_may_pull() in the 82571/2/3 TSO workaround

[Josef Bacik <josef@xxxxxxxxxxxxxx>]

e1000_xmit_frame() uses __pskb_pull_tail() to pull up to 4 bytes of
payload into the head when the head holds only the TSO headers.  It
already checks the result.  Switch to pskb_may_pull(), which takes the
length the head should end up with and checks it against the skb, so
this driver no longer calls __pskb_pull_tail() directly.

Assisted-by: LLM
Signed-off-by: Josef Bacik <josef@xxxxxxxxxxxxxx>
---
 drivers/net/ethernet/intel/e1000e/netdev.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c 
b/drivers/net/ethernet/intel/e1000e/netdev.c
index 844f31ab37ad..e216868e15cb 100644
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -5859,8 +5859,8 @@ static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
                        unsigned int pull_size;
 
                        pull_size = min_t(unsigned int, 4, skb->data_len);
-                       if (!__pskb_pull_tail(skb, pull_size)) {
-                               e_err("__pskb_pull_tail failed.\n");
+                       if (!pskb_may_pull(skb, len + pull_size)) {
+                               e_err("pskb_may_pull failed.\n");
                                dev_kfree_skb_any(skb);
                                return NETDEV_TX_OK;
                        }

-- 
2.55.0