This is a note to let you know that I've just added the patch titled
USB: serial: add wait_until_sent operation
to the 3.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
usb-serial-add-wait_until_sent-operation.patch
and it can be found in the queue-3.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 0693196fe7bbb5e6cafd255dfce91ff6d10bc18f Mon Sep 17 00:00:00 2001
From: Johan Hovold <jhovold@xxxxxxxxx>
Date: Sun, 5 May 2013 20:32:27 +0200
Subject: USB: serial: add wait_until_sent operation
From: Johan Hovold <jhovold@xxxxxxxxx>
commit 0693196fe7bbb5e6cafd255dfce91ff6d10bc18f upstream.
Add wait_until_sent operation which can be used to wait for hardware
buffers to drain.
Signed-off-by: Johan Hovold <jhovold@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/serial/usb-serial.c | 17 +++++++++++++++++
include/linux/usb/serial.h | 1 +
2 files changed, 18 insertions(+)
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -379,6 +379,22 @@ static int serial_chars_in_buffer(struct
return count;
}
+static void serial_wait_until_sent(struct tty_struct *tty, int timeout)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct usb_serial *serial = port->serial;
+
+ dev_dbg(tty->dev, "%s\n", __func__);
+
+ if (!port->serial->type->wait_until_sent)
+ return;
+
+ mutex_lock(&serial->disc_mutex);
+ if (!serial->disconnected)
+ port->serial->type->wait_until_sent(tty, timeout);
+ mutex_unlock(&serial->disc_mutex);
+}
+
static void serial_throttle(struct tty_struct *tty)
{
struct usb_serial_port *port = tty->driver_data;
@@ -1204,6 +1220,7 @@ static const struct tty_operations seria
.unthrottle = serial_unthrottle,
.break_ctl = serial_break,
.chars_in_buffer = serial_chars_in_buffer,
+ .wait_until_sent = serial_wait_until_sent,
.tiocmget = serial_tiocmget,
.tiocmset = serial_tiocmset,
.get_icount = serial_get_icount,
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -267,6 +267,7 @@ struct usb_serial_driver {
struct usb_serial_port *port, struct ktermios *old);
void (*break_ctl)(struct tty_struct *tty, int break_state);
int (*chars_in_buffer)(struct tty_struct *tty);
+ void (*wait_until_sent)(struct tty_struct *tty, long timeout);
void (*throttle)(struct tty_struct *tty);
void (*unthrottle)(struct tty_struct *tty);
int (*tiocmget)(struct tty_struct *tty);
Patches currently in stable-queue which might be from jhovold@xxxxxxxxx are
queue-3.9/usb-mos7720-fix-dma-to-stack.patch
queue-3.9/usb-zte_ev-fix-broken-open.patch
queue-3.9/usb-ark3116-fix-control-message-timeout.patch
queue-3.9/usb-serial-add-wait_until_sent-operation.patch
queue-3.9/usb-mos7840-fix-dma-to-stack.patch
queue-3.9/usb-serial-fix-treo-kyocera-interrrupt-in-urb-context.patch
queue-3.9/usb-serial-add-generic-wait_until_sent-implementation.patch
queue-3.9/usb-mos7720-fix-hardware-flow-control.patch
queue-3.9/usb-keyspan-fix-bogus-array-index.patch
queue-3.9/usb-zte_ev-fix-control-message-timeouts.patch
queue-3.9/usb-mos7720-fix-message-timeouts.patch
queue-3.9/usb-iuu_phoenix-fix-bulk-message-timeout.patch
queue-3.9/usb-whiteheat-fix-broken-port-configuration.patch
queue-3.9/usb-visor-fix-initialisation-of-treo-kyocera-devices.patch
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