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    Subject[PATCH 4.4 021/132] USB: serial: cp210x: enable usb generic throttle/unthrottle
    Date
    From: Brant Merryman <brant.merryman@silabs.com>

    commit 4387b3dbb079d482d3c2b43a703ceed4dd27ed28 upstream

    Assign the .throttle and .unthrottle functions to be generic function
    in the driver structure to prevent data loss that can otherwise occur
    if the host does not enable USB throttling.

    Signed-off-by: Brant Merryman <brant.merryman@silabs.com>
    Co-developed-by: Phu Luu <phu.luu@silabs.com>
    Signed-off-by: Phu Luu <phu.luu@silabs.com>
    Link: https://lore.kernel.org/r/57401AF3-9961-461F-95E1-F8AFC2105F5E@silabs.com
    [ johan: fix up tags ]
    Fixes: 39a66b8d22a3 ("[PATCH] USB: CP2101 Add support for flow control")
    Cc: stable <stable@vger.kernel.org> # 2.6.12
    Signed-off-by: Johan Hovold <johan@kernel.org>
    [sudip: adjust context]
    Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/usb/serial/cp210x.c | 2 ++
    1 file changed, 2 insertions(+)

    --- a/drivers/usb/serial/cp210x.c
    +++ b/drivers/usb/serial/cp210x.c
    @@ -252,6 +252,8 @@ static struct usb_serial_driver cp210x_d
    .close = cp210x_close,
    .break_ctl = cp210x_break_ctl,
    .set_termios = cp210x_set_termios,
    + .throttle = usb_serial_generic_throttle,
    + .unthrottle = usb_serial_generic_unthrottle,
    .tiocmget = cp210x_tiocmget,
    .tiocmset = cp210x_tiocmset,
    .attach = cp210x_startup,

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