From: Ahmed S. Darwish Date: Mon, 5 Jan 2015 17:57:13 +0000 (-0500) Subject: can: kvaser_usb: Don't send a RESET_CHIP for non-existing channels X-Git-Tag: Ubuntu-5.4-5.4.0-11.14~13031^2~12^2~1 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=5e7e6e0c9b47a45576c38b4a72d67927a5e049f7;p=mirror_ubuntu-focal-kernel.git can: kvaser_usb: Don't send a RESET_CHIP for non-existing channels Recent Leaf firmware versions (>= 3.1.557) do not allow to send commands for non-existing channels. If a command is sent for a non-existing channel, the firmware crashes. Reported-by: Christopher Storah Signed-off-by: Olivier Sobrie Signed-off-by: Ahmed S. Darwish Cc: linux-stable Signed-off-by: Marc Kleine-Budde --- diff --git a/drivers/net/can/usb/kvaser_usb.c b/drivers/net/can/usb/kvaser_usb.c index 9accc8272c27..cc7bfc0c0a71 100644 --- a/drivers/net/can/usb/kvaser_usb.c +++ b/drivers/net/can/usb/kvaser_usb.c @@ -1503,6 +1503,10 @@ static int kvaser_usb_init_one(struct usb_interface *intf, struct kvaser_usb_net_priv *priv; int i, err; + err = kvaser_usb_send_simple_msg(dev, CMD_RESET_CHIP, channel); + if (err) + return err; + netdev = alloc_candev(sizeof(*priv), MAX_TX_URBS); if (!netdev) { dev_err(&intf->dev, "Cannot alloc candev\n"); @@ -1607,9 +1611,6 @@ static int kvaser_usb_probe(struct usb_interface *intf, usb_set_intfdata(intf, dev); - for (i = 0; i < MAX_NET_DEVICES; i++) - kvaser_usb_send_simple_msg(dev, CMD_RESET_CHIP, i); - err = kvaser_usb_get_software_info(dev); if (err) { dev_err(&intf->dev,