can: kvaser_usb: fix interface sanity check
authorJohan Hovold <johan@kernel.org>
Tue, 10 Dec 2019 11:32:30 +0000 (12:32 +0100)
committerMarc Kleine-Budde <mkl@pengutronix.de>
Thu, 2 Jan 2020 14:34:27 +0000 (15:34 +0100)
commit5660493c637c9d83786f1c9297f403eae44177b6
tree74d732da4582b6221a201b7af03e9eb7af7cd907
parente7153bf70c3496bac00e7e4f395bb8d8394ac0ea
can: kvaser_usb: fix interface sanity check

Make sure to use the current alternate setting when verifying the
interface descriptors to avoid binding to an invalid interface.

Failing to do so could cause the driver to misbehave or trigger a WARN()
in usb_submit_urb() that kernels with panic_on_warn set would choke on.

Fixes: aec5fb2268b7 ("can: kvaser_usb: Add support for Kvaser USB hydra family")
Cc: stable <stable@vger.kernel.org> # 4.19
Cc: Jimmy Assarsson <extja@kvaser.com>
Cc: Christer Beskow <chbe@kvaser.com>
Cc: Nicklas Johansson <extnj@kvaser.com>
Cc: Martin Henriksson <mh@kvaser.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c
drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c