• Dan Williams's avatar
    usb-wwan: implement TIOCGSERIAL and TIOCSSERIAL to avoid blocking close(2) · 02303f73
    Dan Williams authored
    Some devices (ex ZTE 2726) simply don't respond at all when data is sent
    to some of their USB interfaces.  The data gets stuck in the TTYs queue
    and sits there until close(2), which them blocks because closing_wait
    defaults to 30 seconds (even though the fd is O_NONBLOCK).  This is
    rarely desired.  Implement the standard mechanism to adjust closing_wait
    and let applications handle it how they want to.
    Signed-off-by: default avatarDan Williams <dcbw@redhat.com>
    02303f73
usb-wwan.h 2.23 KB