[RFC PATCH 4/5] can: vcan: add CAN XL support

[Oliver Hartkopp <socketcan@hartkopp.net>]

Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
---
 drivers/net/can/vcan.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/net/can/vcan.c b/drivers/net/can/vcan.c
index a15619d883ec..a8de50fbfe3d 100644
--- a/drivers/net/can/vcan.c
+++ b/drivers/net/can/vcan.c
@@ -68,15 +68,15 @@ static bool echo; /* echo testing. Default: 0 (Off) */
 module_param(echo, bool, 0444);
 MODULE_PARM_DESC(echo, "Echo sent frames (for testing). Default: 0 (Off)");
 
 static void vcan_rx(struct sk_buff *skb, struct net_device *dev)
 {
-	struct canfd_frame *cfd = (struct canfd_frame *)skb->data;
+	unsigned int len = can_get_data_len(skb);
 	struct net_device_stats *stats = &dev->stats;
 
 	stats->rx_packets++;
-	stats->rx_bytes += cfd->len;
+	stats->rx_bytes += len;
 
 	skb->pkt_type  = PACKET_BROADCAST;
 	skb->dev       = dev;
 	skb->ip_summed = CHECKSUM_UNNECESSARY;
 
@@ -85,16 +85,17 @@ static void vcan_rx(struct sk_buff *skb, struct net_device *dev)
 
 static netdev_tx_t vcan_tx(struct sk_buff *skb, struct net_device *dev)
 {
 	struct canfd_frame *cfd = (struct canfd_frame *)skb->data;
 	struct net_device_stats *stats = &dev->stats;
-	int loop, len;
+	unsigned int len = can_get_data_len(skb);
+	int loop;
 
 	if (can_dropped_invalid_skb(dev, skb))
 		return NETDEV_TX_OK;
 
-	len = cfd->can_id & CAN_RTR_FLAG ? 0 : cfd->len;
+	len = cfd->can_id & CAN_RTR_FLAG ? 0 : len;
 	stats->tx_packets++;
 	stats->tx_bytes += len;
 
 	/* set flag whether this packet has to be looped back */
 	loop = skb->pkt_type == PACKET_LOOPBACK;
@@ -132,11 +133,11 @@ static int vcan_change_mtu(struct net_device *dev, int new_mtu)
 {
 	/* Do not allow changing the MTU while running */
 	if (dev->flags & IFF_UP)
 		return -EBUSY;
 
-	if (new_mtu != CAN_MTU && new_mtu != CANFD_MTU)
+	if (new_mtu != CAN_MTU && new_mtu != CANFD_MTU && new_mtu != CANXL_MTU)
 		return -EINVAL;
 
 	dev->mtu = new_mtu;
 	return 0;
 }
-- 
2.30.2