linux-kernel - [PATCH can 3/3] can: rockchip-canfd: rkcanfd_start_xmit(): use can_dev_dropped_skb() instead of can_dropped_invalid

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Message-Id: <20251017-fix-skb-drop-check-v1-3-556665793fa4@pengutronix.de>
Date: Fri, 17 Oct 2025 17:00:01 +0200
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: Dario Binacchi <dario.binacchi@...rulasolutions.com>, 
 Vincent Mailhol <mailhol@...nel.org>, 
 Oliver Hartkopp <socketcan@...tkopp.net>, 
 Stefan Mätje <stefan.maetje@....eu>, socketcan@....eu, 
 Heiko Stuebner <heiko@...ech.de>
Cc: kernel@...gutronix.de, linux-can@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-rockchip@...ts.infradead.org, Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH can 3/3] can: rockchip-canfd: rkcanfd_start_xmit(): use
 can_dev_dropped_skb() instead of can_dropped_invalid_skb()

In addition to can_dropped_invalid_skb(), the helper function
can_dev_dropped_skb() checks whether the device is in listen-only mode and
discards the skb accordingly.

Replace can_dropped_invalid_skb() by can_dev_dropped_skb() to also drop
skbs in for listen-only mode.

Reported-by: Marc Kleine-Budde <mkl@...gutronix.de>
Closes: https://lore.kernel.org/all/20251017-bizarre-enchanted-quokka-f3c704-mkl@pengutronix.de/
Fixes: ff60bfbaf67f ("can: rockchip_canfd: add driver for Rockchip CAN-FD controller")
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
 drivers/net/can/rockchip/rockchip_canfd-tx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/can/rockchip/rockchip_canfd-tx.c b/drivers/net/can/rockchip/rockchip_canfd-tx.c
index 865a15e033a9..12200dcfd338 100644
--- a/drivers/net/can/rockchip/rockchip_canfd-tx.c
+++ b/drivers/net/can/rockchip/rockchip_canfd-tx.c
@@ -72,7 +72,7 @@ netdev_tx_t rkcanfd_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 	int err;
 	u8 i;
 
-	if (can_dropped_invalid_skb(ndev, skb))
+	if (can_dev_dropped_skb(ndev, skb))
 		return NETDEV_TX_OK;
 
 	if (!netif_subqueue_maybe_stop(priv->ndev, 0,

-- 
2.51.0