[PATCH net] net: ethernet: mtk_eth_soc: Reset prog ptr to NULL in case of error in mtk_xdp_setup()

[Lorenzo Bianconi]

Reset eBPF prog pointer to NULL if mtk_open routine in mtk_xdp_setup()
fails.

Fixes: 7c26c20da5d42 ("net: ethernet: mtk_eth_soc: add basic XDP support")
Suggested-by: Paolo Valerio <pvalerio at redhat.com>
Signed-off-by: Lorenzo Bianconi <lorenzo at kernel.org>
---
 drivers/net/ethernet/mediatek/mtk_eth_soc.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index e5e2ffa9c542bfc88dc0d7553d0a6b2a169ec74b..e199f2e243d21f3545e8282ab821135e0962f5c3 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -3751,8 +3751,16 @@ static int mtk_xdp_setup(struct net_device *dev, struct bpf_prog *prog,
 	if (old_prog)
 		bpf_prog_put(old_prog);
 
-	if (netif_running(dev) && need_update)
-		return mtk_open(dev);
+	if (netif_running(dev) && need_update) {
+		int err;
+
+		err = mtk_open(dev);
+		if (err) {
+			rcu_assign_pointer(eth->prog, NULL);
+
+			return err;
+		}
+	}
 
 	return 0;
 }

---
base-commit: fd6dad4e1ae296b67b87291256878a58dad36c93
change-id: 20260227-mtk-xdp-prog-ptr-fix-af59b9cce7ba

Best regards,
-- 
Lorenzo Bianconi <lorenzo at kernel.org>