Hi Greg, On Mon, Aug 17, 2020 at 12:04:51PM +0200, gregkh@xxxxxxxxxxxxxxxxxxx wrote: > > The patch below does not apply to the 4.4-stable tree. > If someone wants it applied there, or to any other stable or longterm > tree, then please email the backport, including the original git commit > id to <stable@xxxxxxxxxxxxxxx>. Here is the backport. -- Regards Sudip
>From 51b1f86f8eb5d4f0aa7653fee5cf70555a5e6b85 Mon Sep 17 00:00:00 2001 From: Brant Merryman <brant.merryman@xxxxxxxxxx> Date: Fri, 26 Jun 2020 04:22:58 +0000 Subject: [PATCH] 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@xxxxxxxxxx> Co-developed-by: Phu Luu <phu.luu@xxxxxxxxxx> Signed-off-by: Phu Luu <phu.luu@xxxxxxxxxx> Link: https://lore.kernel.org/r/57401AF3-9961-461F-95E1-F8AFC2105F5E@xxxxxxxxxx [ johan: fix up tags ] Fixes: 39a66b8d22a3 ("[PATCH] USB: CP2101 Add support for flow control") Cc: stable <stable@xxxxxxxxxxxxxxx> # 2.6.12 Signed-off-by: Johan Hovold <johan@xxxxxxxxxx> [sudip: adjust context] Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@xxxxxxxxx> --- drivers/usb/serial/cp210x.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c index 205f31200264..13c718ebaee5 100644 --- 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, -- 2.11.0
