• Thomas Pugliese's avatar
    wusbcore: fix kernel panic when disconnecting a wireless USB->serial device · ec58fad1
    Thomas Pugliese authored
    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: default avatarThomas Pugliese <thomas.pugliese@gmail.com>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
    ec58fad1
wa-xfer.c 50.6 KB