[PATCH net-next 2/3] net: stmmac: selftests: use skb_share_check() in the loopback receive hook

[Nicolai Buchwitz]

The loopback hook gets a shared skb when another ETH_P_IP handler is
bound to the device. skb_unshare() does not unshare it, so
skb_linearize() on a non-linear frame hits BUG_ON(skb_shared()).

Use skb_share_check() instead.

Fixes: 091810dbded9 ("net: stmmac: Introduce selftests support")
Signed-off-by: Nicolai Buchwitz <nb at tipi-net.de>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c
index 6097f312fce4..c910675a9d9b 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c
@@ -244,7 +244,7 @@ static int stmmac_test_loopback_validate(struct sk_buff *skb,
 	struct tcphdr *thdr;
 	struct iphdr *ihdr;
 
-	skb = skb_unshare(skb, GFP_ATOMIC);
+	skb = skb_share_check(skb, GFP_ATOMIC);
 	if (!skb)
 		goto out;
 

-- 
2.53.0