USB: serial: refactor generic close

Export usb_serial_generic_close so that drivers can easily kill the read
and write urb and make sure that the write fifo is reset.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

6 files changed, 8 insertions, 21 deletions

diff --git a/drivers/usb/serial/ark3116.c b/drivers/usb/serial/ark3116.c
index 9b66bf19f751..0ae610efa23d 100644
--- a/drivers/usb/serial/ark3116.c
+++ b/drivers/usb/serial/ark3116.c
@@ -355,14 +355,11 @@ static void ark3116_close(struct usb_serial_port *port)
                 /* deactivate interrupts */
                 ark3116_write_reg(serial, UART_IER, 0);
 
-                /* shutdown any bulk reads that might be going on */
-                if (serial->num_bulk_out)
-                        usb_kill_urb(port->write_urb);
-                if (serial->num_bulk_in)
-                        usb_kill_urb(port->read_urb);
+                usb_serial_generic_close(port);
                 if (serial->num_interrupt_in)
                         usb_kill_urb(port->interrupt_in_urb);
         }
+
 }
 
 static int ark3116_open(struct tty_struct *tty, struct usb_serial_port *port)
diff --git a/drivers/usb/serial/belkin_sa.c b/drivers/usb/serial/belkin_sa.c
index 1295e44e3f1c..bdab31afc37d 100644
--- a/drivers/usb/serial/belkin_sa.c
+++ b/drivers/usb/serial/belkin_sa.c
@@ -246,9 +246,7 @@ static void belkin_sa_close(struct usb_serial_port *port)
 {
         dbg("%s port %d", __func__, port->number);
 
-        /* shutdown our bulk reads and writes */
-        usb_kill_urb(port->write_urb);
-        usb_kill_urb(port->read_urb);
+        usb_serial_generic_close(port);
         usb_kill_urb(port->interrupt_in_urb);
 } /* belkin_sa_close */
 
diff --git a/drivers/usb/serial/ch341.c b/drivers/usb/serial/ch341.c
index 7e8e39818414..63f7cc45bcac 100644
--- a/drivers/usb/serial/ch341.c
+++ b/drivers/usb/serial/ch341.c
@@ -305,10 +305,7 @@ static void ch341_close(struct usb_serial_port *port)
 {
         dbg("%s - port %d", __func__, port->number);
 
-        /* shutdown our urbs */
-        dbg("%s - shutting down urbs", __func__);
-        usb_kill_urb(port->write_urb);
-        usb_kill_urb(port->read_urb);
+        usb_serial_generic_close(port);
         usb_kill_urb(port->interrupt_in_urb);
 }
 
diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
index 705a7e7a9746..fa4fb5e0cf12 100644
--- a/drivers/usb/serial/cp210x.c
+++ b/drivers/usb/serial/cp210x.c
@@ -422,10 +422,7 @@ static void cp210x_close(struct usb_serial_port *port)
 {
         dbg("%s - port %d", __func__, port->number);
 
-        /* shutdown our urbs */
-        dbg("%s - shutting down urbs", __func__);
-        usb_kill_urb(port->write_urb);
-        usb_kill_urb(port->read_urb);
+        usb_serial_generic_close(port);
 
         mutex_lock(&port->serial->disc_mutex);
         if (!port->serial->disconnected)
diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c
index 583244bd84b1..e1d245aa4a1d 100644
--- a/drivers/usb/serial/generic.c
+++ b/drivers/usb/serial/generic.c
@@ -179,6 +179,7 @@ void usb_serial_generic_close(struct usb_serial_port *port)
         dbg("%s - port %d", __func__, port->number);
         generic_cleanup(port);
 }
+EXPORT_SYMBOL_GPL(usb_serial_generic_close);
 
 static int usb_serial_multi_urb_write(struct tty_struct *tty,
         struct usb_serial_port *port, const unsigned char *buf, int count)
diff --git a/drivers/usb/serial/mct_u232.c b/drivers/usb/serial/mct_u232.c
index 2849f8c32015..7aa01b95b1d4 100644
--- a/drivers/usb/serial/mct_u232.c
+++ b/drivers/usb/serial/mct_u232.c
@@ -549,12 +549,9 @@ static void mct_u232_close(struct usb_serial_port *port)
 {
         dbg("%s port %d", __func__, port->number);
 
-        if (port->serial->dev) {
-                /* shutdown our urbs */
-                usb_kill_urb(port->write_urb);
-                usb_kill_urb(port->read_urb);
+        usb_serial_generic_close(port);
+        if (port->serial->dev)
                 usb_kill_urb(port->interrupt_in_urb);
-        }
 } /* mct_u232_close */