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patch "USB: serial: f81232: fix interrupt worker not stop" added to usb-next

PATCH [email protected] 1 participant 1 message May 3, 2019

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This is a note to let you know that I've just added the patch titled

USB: serial: f81232: fix interrupt worker not stop

to my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-next branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will also be merged in the next major kernel release during the merge window.

If you have any questions about this process, please let me know.

From 804dbee1e49774918339c1e5a87400988c0819e8 Mon Sep 17 00:00:00 2001
From: "Ji-Ze Hong (Peter Hong)" <[email protected]>
Date: Tue, 30 Apr 2019 09:22:29 +0800
Subject: 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 Ji-Ze Hong (Peter Hong) <[email protected]>
[ johan: amend commit message ]
Fixes 87fe5adcd8de ("USB: f81232: implement read IIR/MSR with endpoint")
Cc stable <[email protected]> # 4.1
Signed-off-by Johan Hovold <[email protected]>
---
 drivers/usb/serial/f81232.c | 39 +++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
drivers/usb/serial/f81232.c +39 -0
index 0dcdcb4b2cde..dee6f2caf9b5 100644
@@ -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[] = {
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2.21.0