From: Marc Kleine-Budde Date: Tue, 18 Jun 2013 12:33:58 +0000 (+0200) Subject: can: usb_8dev: unregister netdev before free()ing X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=4afe2156eb639e563d6ef0c2706b66ea400348b2;p=linux-beck.git can: usb_8dev: unregister netdev before free()ing The usb_8dev hardware has problems on some xhci USB hosts. The driver fails to read the firmware revision in the probe function. This leads to the following Oops: [ 3356.635912] kernel BUG at net/core/dev.c:5701! The driver tries to free the netdev, which has already been registered, without unregistering it. This patch fixes the problem by unregistering the netdev in the error path. Reported-by: Michael Olbrich Reviewed-by: Bernd Krumboeck Signed-off-by: Marc Kleine-Budde --- diff --git a/drivers/net/can/usb/usb_8dev.c b/drivers/net/can/usb/usb_8dev.c index 6e15ef08f301..cbd388eea682 100644 --- a/drivers/net/can/usb/usb_8dev.c +++ b/drivers/net/can/usb/usb_8dev.c @@ -977,7 +977,7 @@ static int usb_8dev_probe(struct usb_interface *intf, err = usb_8dev_cmd_version(priv, &version); if (err) { netdev_err(netdev, "can't get firmware version\n"); - goto cleanup_cmd_msg_buffer; + goto cleanup_unregister_candev; } else { netdev_info(netdev, "firmware: %d.%d, hardware: %d.%d\n", @@ -989,6 +989,9 @@ static int usb_8dev_probe(struct usb_interface *intf, return 0; +cleanup_unregister_candev: + unregister_netdev(priv->netdev); + cleanup_cmd_msg_buffer: kfree(priv->cmd_msg_buffer);