[PATCH] net: ax88796c: Fix return type of ax88796c_start_xmit

From: Nathan Huckleberry
Date: Mon Sep 12 2022 - 15:41:05 EST


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 ax88796c_start_xmit 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>
---
drivers/net/ethernet/asix/ax88796c_main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/asix/ax88796c_main.c b/drivers/net/ethernet/asix/ax88796c_main.c
index 6ba5b024a7be..f1d610efd69e 100644
--- a/drivers/net/ethernet/asix/ax88796c_main.c
+++ b/drivers/net/ethernet/asix/ax88796c_main.c
@@ -381,7 +381,7 @@ static int ax88796c_hard_xmit(struct ax88796c_device *ax_local)
return 1;
}

-static int
+static netdev_tx_t
ax88796c_start_xmit(struct sk_buff *skb, struct net_device *ndev)
{
struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
--
2.37.2.789.g6183377224-goog