diff options
| -rw-r--r-- | drivers/usb/serial/mos7720.c | 33 | ||||
| -rw-r--r-- | drivers/usb/serial/usb-serial.c | 28 | ||||
| -rw-r--r-- | include/linux/usb/serial.h | 2 |
3 files changed, 34 insertions, 29 deletions
diff --git a/drivers/usb/serial/mos7720.c b/drivers/usb/serial/mos7720.c index 725991f..40f3a01 100644 --- a/drivers/usb/serial/mos7720.c +++ b/drivers/usb/serial/mos7720.c @@ -564,22 +564,25 @@ static void mos7720_close(struct usb_serial_port *port, struct file *filp) } /* While closing port, shutdown all bulk read, write * - * and interrupt read if they exists */ - if (serial->dev) { - dbg("Shutdown bulk write"); - usb_kill_urb(port->write_urb); - dbg("Shutdown bulk read"); - usb_kill_urb(port->read_urb); + * and interrupt read if they exists, otherwise nop */ + dbg("Shutdown bulk write"); + usb_kill_urb(port->write_urb); + dbg("Shutdown bulk read"); + usb_kill_urb(port->read_urb); + + mutex_lock(&serial->disc_mutex); + /* these commands must not be issued if the device has + * been disconnected */ + if (!serial->disconnected) { + data = 0x00; + send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor, + 0x04, &data); + + data = 0x00; + send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor, + 0x01, &data); } - - data = 0x00; - send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor, - 0x04, &data); - - data = 0x00; - send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor, - 0x01, &data); - + mutex_unlock(&serial->disc_mutex); mos7720_port->open = 0; dbg("Leaving %s", __FUNCTION__); diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c index 28315b0..3ce98e8 100644 --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -634,6 +634,7 @@ static struct usb_serial * create_serial (struct usb_device *dev, serial->type = driver; serial->interface = interface; kref_init(&serial->kref); + mutex_init(&serial->disc_mutex); return serial; } @@ -1089,20 +1090,22 @@ void usb_serial_disconnect(struct usb_interface *interface) usb_serial_console_disconnect(serial); dbg ("%s", __FUNCTION__); + mutex_lock(&serial->disc_mutex); usb_set_intfdata (interface, NULL); - if (serial) { - for (i = 0; i < serial->num_ports; ++i) { - port = serial->port[i]; - if (port) { - if (port->tty) - tty_hangup(port->tty); - kill_traffic(port); - } + /* must set a flag, to signal subdrivers */ + serial->disconnected = 1; + for (i = 0; i < serial->num_ports; ++i) { + port = serial->port[i]; + if (port) { + if (port->tty) + tty_hangup(port->tty); + kill_traffic(port); } - /* let the last holder of this object - * cause it to be cleaned up */ - usb_serial_put(serial); } + /* let the last holder of this object + * cause it to be cleaned up */ + mutex_unlock(&serial->disc_mutex); + usb_serial_put(serial); dev_info(dev, "device disconnected\n"); } @@ -1112,9 +1115,6 @@ int usb_serial_suspend(struct usb_interface *intf, pm_message_t message) struct usb_serial_port *port; int i, r = 0; - if (!serial) /* device has been disconnected */ - return 0; - for (i = 0; i < serial->num_ports; ++i) { port = serial->port[i]; if (port) diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h index ef1e430..63b29b5 100644 --- a/include/linux/usb/serial.h +++ b/include/linux/usb/serial.h @@ -129,6 +129,7 @@ struct usb_serial { struct usb_device * dev; struct usb_serial_driver * type; struct usb_interface * interface; + unsigned char disconnected; unsigned char minor; unsigned char num_ports; unsigned char num_port_pointers; @@ -138,6 +139,7 @@ struct usb_serial { char num_bulk_out; struct usb_serial_port * port[MAX_NUM_PORTS]; struct kref kref; + struct mutex disc_mutex; void * private; }; #define to_usb_serial(d) container_of(d, struct usb_serial, kref) |