USB: serial: cp210x: enable usb generic throttle/unthrottle

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>

diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
index 205f31200264b99fdda97915c6d1d258e4706351..13c718ebaee5b1e78331932db4e1fe6e536c4a10 100644 (file)
--- a/drivers/usb/serial/cp210x.c
+++ b/drivers/usb/serial/cp210x.c
@@ -252,6 +252,8 @@ static struct usb_serial_driver cp210x_device = {
        .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,