linux-kernel - [PATCH v3 1/4] can: slcan: use can_dropped_invalid

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Date:   Sat, 14 May 2022 23:16:47 +0900
From:   Vincent Mailhol <mailhol.vincent@...adoo.fr>
To:     Marc Kleine-Budde <mkl@...gutronix.de>
Cc:     linux-can@...r.kernel.org, linux-kernel@...r.kernel.org,
        Max Staudt <max@...as.org>,
        Oliver Hartkopp <socketcan@...tkopp.net>,
        netdev@...r.kernel.org,
        Vincent Mailhol <mailhol.vincent@...adoo.fr>
Subject: [PATCH v3 1/4] can: slcan: use can_dropped_invalid_skb() instead of manual check

slcan does a manual check in slc_xmit() to verify if the skb is
valid. This check is incomplete, use instead
can_dropped_invalid_skb().

Signed-off-by: Vincent Mailhol <mailhol.vincent@...adoo.fr>
---
 drivers/net/can/slcan.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/can/slcan.c b/drivers/net/can/slcan.c
index 27783fbf011f..1879b50391ee 100644
--- a/drivers/net/can/slcan.c
+++ b/drivers/net/can/slcan.c
@@ -359,8 +359,8 @@ static netdev_tx_t slc_xmit(struct sk_buff *skb, struct net_device *dev)
 {
 	struct slcan *sl = netdev_priv(dev);
 
-	if (skb->len != CAN_MTU)
-		goto out;
+	if (can_dropped_invalid_skb(dev, skb))
+		return NETDEV_TX_OK;
 
 	spin_lock(&sl->lock);
 	if (!netif_running(dev))  {
-- 
2.35.1