[PATCH AUTOSEL 4.14 14/23] net: korina: Fix return type of korina_send_packet

[Sasha Levin]

From: Nathan Huckleberry <nhuck@xxxxxxxxxx>

[ Upstream commit 106c67ce46f3c82dd276e983668a91d6ed631173 ]

The ndo_start_xmit field in net_device_ops is expected to be of type
netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, struct net_device *dev).

The mismatched return type breaks forward edge kCFI since the underlying
function definition does not match the function hook definition.

The return type of korina_send_packet should be changed from int to
netdev_tx_t.

Reported-by: Dan Carpenter <error27@xxxxxxxxx>
Link: https://github.com/ClangBuiltLinux/linux/issues/1703
Cc: llvm@xxxxxxxxxxxxxxx
Signed-off-by: Nathan Huckleberry <nhuck@xxxxxxxxxx>
Reviewed-by: Nathan Chancellor <nathan@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220912214344.928925-1-nhuck@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/net/ethernet/korina.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/korina.c b/drivers/net/ethernet/korina.c
index ec1c14e3eace..09e3e516ded3 100644
--- a/drivers/net/ethernet/korina.c
+++ b/drivers/net/ethernet/korina.c
@@ -193,7 +193,8 @@ static void korina_chain_rx(struct korina_private *lp,
 }
 
 /* transmit packet */
-static int korina_send_packet(struct sk_buff *skb, struct net_device *dev)
+static netdev_tx_t korina_send_packet(struct sk_buff *skb,
+				      struct net_device *dev)
 {
 	struct korina_private *lp = netdev_priv(dev);
 	unsigned long flags;
-- 
2.35.1