[PATCH 1/4] can: slcan: do not allocate unused echo skb

[Vincent Mailhol <mailhol@kernel.org>]

The slcan driver does not use the generic CAN echo skb helpers. It leaves
IFF_ECHO clear and relies on the PF_CAN fallback echo path instead.

There is therefore no need to allocate one generic echo skb slot for
slcan. Request zero echo skb slots when allocating the CAN netdevice.

Signed-off-by: Vincent Mailhol <mailhol@kernel.org>
---
 drivers/net/can/slcan/slcan-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/can/slcan/slcan-core.c b/drivers/net/can/slcan/slcan-core.c
index 7439849d5c84..546b9dcb08cc 100644
--- a/drivers/net/can/slcan/slcan-core.c
+++ b/drivers/net/can/slcan/slcan-core.c
@@ -826,7 +826,7 @@ static int slcan_open(struct tty_struct *tty)
 	if (!tty->ops->write)
 		return -EOPNOTSUPP;
 
-	dev = alloc_candev(sizeof(*sl), 1);
+	dev = alloc_candev(sizeof(*sl), 0);
 	if (!dev)
 		return -ENFILE;
 

-- 
2.54.0