• Thomas Pugliese's avatar
    wusbcore: fix kernel panic when disconnecting a wireless USB->serial device · f34a4837
    Thomas Pugliese authored
    commit ec58fad1feb76c323ef47efff1d1e8660ed4644c upstream.
    This patch fixes a kernel panic that can occur when disconnecting a
    wireless USB->serial device.  When the serial device disconnects, the
    device cleanup procedure ends up calling usb_hcd_disable_endpoint on the
    serial device's endpoints.  The wusbcore uses the ABORT_RPIPE command to
    abort all transfers on the given endpoint but it does not properly give
    back the URBs when the transfer results return from the HWA.  This patch
    prevents the transfer result processing code from bailing out when it sees
    a WA_XFER_STATUS_ABORTED result code so that these urbs are flushed
    properly by usb_hcd_disable_endpoint.  It also updates wa_urb_dequeue to
    handle the case where the endpoint has already been cleaned up when
    usb_kill_urb is called which is where the panic originally occurred.
    Signed-off-by: 's avatarThomas Pugliese <thomas.pugliese@gmail.com>
    Signed-off-by: 's avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
wa-xfer.c 46.3 KB