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[PATCH] USB: fix usb-serial leaks, oopses on disconnect

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This fix addresses two issues:
- Unattached port structures were not freed
- My initial fix for crash when eventd runs a work in a freed port
  did not go far enough

Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Pete Zaitcev 2006-06-21 15:00:45 -07:00 committed by Greg Kroah-Hartman
parent 92164c5dd1
commit 34f8e76172
1 changed files with 9 additions and 14 deletions
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23
drivers/usb/serial/usb-serial.c
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@ -40,6 +40,8 @@
#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",
@ -146,23 +148,10 @@ static void destroy_serial(struct kref *kref)
port = serial->port[i];
if (!port)
continue;
usb_kill_urb(port->read_urb);
usb_free_urb(port->read_urb);
usb_kill_urb(port->write_urb);
usb_free_urb(port->write_urb);
usb_kill_urb(port->interrupt_in_urb);
usb_free_urb(port->interrupt_in_urb);
usb_kill_urb(port->interrupt_out_urb);
usb_free_urb(port->interrupt_out_urb);
kfree(port->bulk_in_buffer);
kfree(port->bulk_out_buffer);
kfree(port->interrupt_in_buffer);
kfree(port->interrupt_out_buffer);
port_free(port);
}
}
flush_scheduled_work(); /* port->work */
usb_put_dev(serial->dev);
/* free up any memory that we allocated */
@ -564,6 +553,11 @@ static void port_release(struct device *dev)
struct usb_serial_port *port = to_usb_serial_port(dev);
dbg ("%s - %s", __FUNCTION__, dev->bus_id);
port_free(port);
}
static void port_free(struct usb_serial_port *port)
{
usb_kill_urb(port->read_urb);
usb_free_urb(port->read_urb);
usb_kill_urb(port->write_urb);
@ -576,6 +570,7 @@ static void port_release(struct device *dev)
kfree(port->bulk_out_buffer);
kfree(port->interrupt_in_buffer);
kfree(port->interrupt_out_buffer);
flush_scheduled_work(); /* port->work */
kfree(port);
}