Commit 804dbee1 authored by Ji-Ze Hong (Peter Hong)'s avatar Ji-Ze Hong (Peter Hong) Committed by Johan Hovold
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USB: serial: f81232: fix interrupt worker not stop 



The F81232 will use interrupt worker to handle MSR change.
This patch will fix the issue that interrupt work should stop
in close() and suspend().

This also fixes line-status events being disabled after a suspend cycle
until the port is re-opened.

Signed-off-by: default avatarJi-Ze Hong (Peter Hong) <hpeter+linux_kernel@gmail.com>
[ johan: amend commit message ]
Fixes: 87fe5adc ("USB: f81232: implement read IIR/MSR with endpoint")
Cc: stable <stable@vger.kernel.org>	# 4.1
Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
parent deb55e40

drivers/usb/serial/f81232.c

+39 −0
Original line number Diff line number Diff line
@@ -556,9 +556,12 @@ static int f81232_open(struct tty_struct *tty, struct usb_serial_port *port) 


static void f81232_close(struct usb_serial_port *port)

{

	struct f81232_private *port_priv = usb_get_serial_port_data(port);



	f81232_port_disable(port);

	usb_serial_generic_close(port);

	usb_kill_urb(port->interrupt_in_urb);

	flush_work(&port_priv->interrupt_work);

}



static void f81232_dtr_rts(struct usb_serial_port *port, int on)
@@ -632,6 +635,40 @@ static int f81232_port_remove(struct usb_serial_port *port) 
	return 0;

}



static int f81232_suspend(struct usb_serial *serial, pm_message_t message)

{

	struct usb_serial_port *port = serial->port[0];

	struct f81232_private *port_priv = usb_get_serial_port_data(port);

	int i;



	for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i)

		usb_kill_urb(port->read_urbs[i]);



	usb_kill_urb(port->interrupt_in_urb);



	if (port_priv)

		flush_work(&port_priv->interrupt_work);



	return 0;

}



static int f81232_resume(struct usb_serial *serial)

{

	struct usb_serial_port *port = serial->port[0];

	int result;



	if (tty_port_initialized(&port->port)) {

		result = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO);

		if (result) {

			dev_err(&port->dev, "submit interrupt urb failed: %d\n",

					result);

			return result;

		}

	}



	return usb_serial_generic_resume(serial);

}



static struct usb_serial_driver f81232_device = {

	.driver = {

		.owner =	THIS_MODULE,
@@ -655,6 +692,8 @@ static struct usb_serial_driver f81232_device = { 
	.read_int_callback =	f81232_read_int_callback,

	.port_probe =		f81232_port_probe,

	.port_remove =		f81232_port_remove,

	.suspend =		f81232_suspend,

	.resume =		f81232_resume,

};



static struct usb_serial_driver * const serial_drivers[] = {