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-rw-r--r--drivers/usb/serial/usb-serial.c95
1 files changed, 20 insertions, 75 deletions
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 80c1f4d8e91..f1a1f0fb6d1 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -43,8 +43,6 @@
#define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com, http://www.kroah.com/linux/"
#define DRIVER_DESC "USB Serial Driver core"
-static void port_free(struct usb_serial_port *port);
-
/* Driver structure we register with the USB core */
static struct usb_driver usb_serial_driver = {
.name = "usbserial",
@@ -145,27 +143,16 @@ static void destroy_serial(struct kref *kref)
serial->type->release(serial);
- for (i = 0; i < serial->num_ports; ++i) {
+ /* Now that nothing is using the ports, they can be freed */
+ for (i = 0; i < serial->num_port_pointers; ++i) {
port = serial->port[i];
- if (port)
+ if (port) {
+ port->serial = NULL;
put_device(&port->dev);
- }
-
- /* If this is a "fake" port, we have to clean it up here, as it will
- * not get cleaned up in port_release() as it was never registered with
- * the driver core */
- if (serial->num_ports < serial->num_port_pointers) {
- for (i = serial->num_ports;
- i < serial->num_port_pointers; ++i) {
- port = serial->port[i];
- if (port)
- port_free(port);
}
}
usb_put_dev(serial->dev);
-
- /* free up any memory that we allocated */
kfree(serial);
}
@@ -201,8 +188,6 @@ static int serial_open (struct tty_struct *tty, struct file *filp)
port = serial->port[portNumber];
if (!port || serial->disconnected)
retval = -ENODEV;
- else
- get_device(&port->dev);
/*
* Note: Our locking order requirement does not allow port->mutex
* to be acquired while serial->disc_mutex is held.
@@ -213,7 +198,7 @@ static int serial_open (struct tty_struct *tty, struct file *filp)
if (mutex_lock_interruptible(&port->mutex)) {
retval = -ERESTARTSYS;
- goto bailout_port_put;
+ goto bailout_serial_put;
}
++port->port.count;
@@ -273,8 +258,6 @@ bailout_mutex_unlock:
tty->driver_data = NULL;
tty_port_tty_set(&port->port, NULL);
mutex_unlock(&port->mutex);
-bailout_port_put:
- put_device(&port->dev);
bailout_serial_put:
usb_serial_put(serial);
return retval;
@@ -333,14 +316,13 @@ static void serial_do_free(struct tty_struct *tty)
serial = port->serial;
owner = serial->type->driver.owner;
- put_device(&port->dev);
- /* Mustn't dereference port any more */
+
mutex_lock(&serial->disc_mutex);
if (!serial->disconnected)
usb_autopm_put_interface(serial->interface);
mutex_unlock(&serial->disc_mutex);
+
usb_serial_put(serial);
- /* Mustn't dereference serial any more */
module_put(owner);
}
@@ -581,14 +563,6 @@ static void usb_serial_port_work(struct work_struct *work)
tty_kref_put(tty);
}
-static void port_release(struct device *dev)
-{
- struct usb_serial_port *port = to_usb_serial_port(dev);
-
- dbg ("%s - %s", __func__, dev_name(dev));
- port_free(port);
-}
-
static void kill_traffic(struct usb_serial_port *port)
{
usb_kill_urb(port->read_urb);
@@ -608,8 +582,12 @@ static void kill_traffic(struct usb_serial_port *port)
usb_kill_urb(port->interrupt_out_urb);
}
-static void port_free(struct usb_serial_port *port)
+static void port_release(struct device *dev)
{
+ struct usb_serial_port *port = to_usb_serial_port(dev);
+
+ dbg ("%s - %s", __func__, dev_name(dev));
+
/*
* Stop all the traffic before cancelling the work, so that
* nobody will restart it by calling usb_serial_port_softint.
@@ -955,6 +933,11 @@ int usb_serial_probe(struct usb_interface *interface,
mutex_init(&port->mutex);
INIT_WORK(&port->work, usb_serial_port_work);
serial->port[i] = port;
+ port->dev.parent = &interface->dev;
+ port->dev.driver = NULL;
+ port->dev.bus = &usb_serial_bus_type;
+ port->dev.release = &port_release;
+ device_initialize(&port->dev);
}
/* set up the endpoint information */
@@ -1097,15 +1080,10 @@ int usb_serial_probe(struct usb_interface *interface,
/* register all of the individual ports with the driver core */
for (i = 0; i < num_ports; ++i) {
port = serial->port[i];
- port->dev.parent = &interface->dev;
- port->dev.driver = NULL;
- port->dev.bus = &usb_serial_bus_type;
- port->dev.release = &port_release;
-
dev_set_name(&port->dev, "ttyUSB%d", port->number);
dbg ("%s - registering %s", __func__, dev_name(&port->dev));
port->dev_state = PORT_REGISTERING;
- retval = device_register(&port->dev);
+ retval = device_add(&port->dev);
if (retval) {
dev_err(&port->dev, "Error registering port device, "
"continuing\n");
@@ -1123,39 +1101,7 @@ exit:
return 0;
probe_error:
- for (i = 0; i < num_bulk_in; ++i) {
- port = serial->port[i];
- if (!port)
- continue;
- usb_free_urb(port->read_urb);
- kfree(port->bulk_in_buffer);
- }
- for (i = 0; i < num_bulk_out; ++i) {
- port = serial->port[i];
- if (!port)
- continue;
- usb_free_urb(port->write_urb);
- kfree(port->bulk_out_buffer);
- }
- for (i = 0; i < num_interrupt_in; ++i) {
- port = serial->port[i];
- if (!port)
- continue;
- usb_free_urb(port->interrupt_in_urb);
- kfree(port->interrupt_in_buffer);
- }
- for (i = 0; i < num_interrupt_out; ++i) {
- port = serial->port[i];
- if (!port)
- continue;
- usb_free_urb(port->interrupt_out_urb);
- kfree(port->interrupt_out_buffer);
- }
-
- /* free up any memory that we allocated */
- for (i = 0; i < serial->num_port_pointers; ++i)
- kfree(serial->port[i]);
- kfree(serial);
+ usb_serial_put(serial);
return -EIO;
}
EXPORT_SYMBOL_GPL(usb_serial_probe);
@@ -1206,8 +1152,7 @@ void usb_serial_disconnect(struct usb_interface *interface)
}
serial->type->disconnect(serial);
- /* let the last holder of this object
- * cause it to be cleaned up */
+ /* let the last holder of this object cause it to be cleaned up */
usb_serial_put(serial);
dev_info(dev, "device disconnected\n");
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 00:47:23 +0000