Steve Holland pointed out that we forgot to call break; in the switch
statment.  This probably resolves a lot of the bug reports I've gotten
for the driver lately.
Stupid me...
Reported-by: Steve Holland <sdh4@iastate.edu>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
        switch (cmd) {
        case USBTMC_IOCTL_CLEAR_OUT_HALT:
                retval = usbtmc_ioctl_clear_out_halt(data);
+               break;
 
        case USBTMC_IOCTL_CLEAR_IN_HALT:
                retval = usbtmc_ioctl_clear_in_halt(data);
+               break;
 
        case USBTMC_IOCTL_INDICATOR_PULSE:
                retval = usbtmc_ioctl_indicator_pulse(data);
+               break;
 
        case USBTMC_IOCTL_CLEAR:
                retval = usbtmc_ioctl_clear(data);
+               break;
 
        case USBTMC_IOCTL_ABORT_BULK_OUT:
                retval = usbtmc_ioctl_abort_bulk_out(data);
+               break;
 
        case USBTMC_IOCTL_ABORT_BULK_IN:
                retval = usbtmc_ioctl_abort_bulk_in(data);
+               break;
        }
 
        mutex_unlock(&data->io_mutex);