FAILED: patch "[PATCH] USB: serial: cp210x: enable usb generic throttle/unthrottle" failed to apply to 4.4-stable tree

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 <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 4387b3dbb079d482d3c2b43a703ceed4dd27ed28 Mon Sep 17 00:00:00 2001
From: Brant Merryman <[email protected]>
Date: Fri, 26 Jun 2020 04:22:58 +0000
Subject: [PATCH] USB: serial: cp210x: enable usb generic throttle/unthrottle

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.

index f5143eedbc48..bcceb4ad8be0 100644
@@ -272,6 +272,8 @@ static struct usb_serial_driver cp210x_device = {
 	.break_ctl		= cp210x_break_ctl,
 	.set_termios		= cp210x_set_termios,
 	.tx_empty		= cp210x_tx_empty,
+	.throttle		= usb_serial_generic_throttle,
+	.unthrottle		= usb_serial_generic_unthrottle,
 	.tiocmget		= cp210x_tiocmget,
 	.tiocmset		= cp210x_tiocmset,
 	.attach			= cp210x_attach,

Hi Greg,

Here is the backport.

--
Regards
Sudip

From 51b1f86f8eb5d4f0aa7653fee5cf70555a5e6b85 Mon Sep 17 00:00:00 2001
From: Brant Merryman <[email protected]>
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.

---
 drivers/usb/serial/cp210x.c | 2 ++
 1 file changed, 2 insertions(+)

index 205f31200264..13c718ebaee5 100644
@@ -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

Thanks, now queued up.

greg k-h